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2024 Water Quality Report

The Wayne County Airport Authority wants you to know the water we supply to our customers complies with all Federal and State standards for quality and safety.

Water System Serial Number (WSSN): 01798

DTW 2024 Consumer Confidence Report

Consumer Confidence Report

Drinking water quality is important to communities near Detroit Metropolitan Airport (DTW). The Wayne County Airport Authority (WCAA) and the Great Lakes Water Authority (GLWA) are committed to meeting state and federal water quality standards, including the Lead and Copper Rule. With the Great Lakes as our water source and proven treatment technologies, GLWA consistently delivers safe drinking water to Detroit Metro Airport. The WCAA operates the system of water mains that carry this water to Airport buildings. The Water Quality Report highlights the performance of GLWA and WCAA water professionals in delivering some of the nation's best drinking water. Together, GLWA and WCAA remain committed to protecting public health and maintaining open communication with the public concerning DTW's drinking water.

OUR WATER IS SAFE

Last year DTW's tap water met all standards required by the U.S. Environmental Protection Agency (EPA) and the State of Michigan Department of Environment, Great Lakes, and Energy (EGLE). This 2024 Annual Water Quality Report describes water sources, lists test results, and contains important information about water and health. This report is intended to provide consumers with an understanding of drinking water issues and to heighten awareness of the need to protect drinking water resources. For more information on these testing results, please see the water quality tables and definitions as provided. The WCAA hopes you find this report helpful.

DRINKING WATER

Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency's Safe Drinking Water Hotline at (800-426-4791).

The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.

Contaminants that may be present in source water include:

Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.

Inorganic contaminants, such as salts and metals, which can be naturally occurring or result from urban storm water runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.

Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban storm water runoff, and residential uses.

Organic chemical contaminants, including synthetic and volatile organics, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban storm water runoff and septic systems.

Radioactive contaminants, which can be naturally occurring or be the result of oil and gas production and mining activities.

DTW 2024 Consumer Confidence Report

In order to ensure that tap water is safe to drink, EPA prescribes regulations, which limit the amount of certain contaminants in water provided by public water systems. The Food and Drug Administration (FDA) regulations establish limits for contaminants in bottled water, which must provide the same protection for human health.

PEOPLE WITH SPECIAL HEALTH CONCERNS

Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune systems disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. USEPA/Center for Disease Control guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (800-426-4791).

LEAD & COPPER INFORMATION

If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Infants and children who drink water containing lead could experience delays in their physical and mental development. Children could show slight deficits in attention span and learning abilities. Adults who drink this water over many years could develop kidney problems or high blood pressure.

Lead can cause serious health effects in people of all ages, especially pregnant people, infants (both formula-fed and breastfed), and young children. Lead in drinking water is primarily from materials and parts used in service lines and in home plumbing. WCAA is responsible for providing high quality drinking water and removing lead pipes but cannot control the variety of materials used in the plumbing in your home. Because lead levels may vary over time, lead exposure is possible even when your tap sampling results do not detect lead at one point in time. You can help protect yourself and your family by identifying and removing lead materials within your home plumbing and taking steps to reduce your family's risk. Using a filter, certified by an American National Standards Institute accredited certifier to reduce lead, is effective in reducing lead exposures. Follow the instructions provided with the filter to ensure the filter is used properly. Use only cold water for drinking, cooking, and making baby formula. Boiling water does not remove lead from water. Before using tap water for drinking, cooking, or making baby formula, flush your pipes for several minutes. You can do this by running your tap, taking a shower, doing laundry or a load of dishes. If you have a lead service line or galvanized requiring replacement service line, you may need to flush your pipes for at least 5 minutes to flush water from both your home plumbing and the lead service line. If you are concerned about lead in your water and wish to have your water tested, contact Wayne County Airport Authority Detroit Metro Water System Utility Manager and Water Operator at (734) 247-2780 for available resources. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available at https://www.epa.gov/safewater/lead.

Copper is an essential nutrient, but some people who drink water containing copper in excess of the action level over a relatively short amount of time could experience gastrointestinal distress. Some people who drink water containing copper in excess of the action level over many years could suffer liver or kidney damage. People with Wilson's Disease should consult their personal doctor. Copper in drinking water is primarily from corrosion of household plumbing systems, erosion of natural deposits, and leaching from wood preservatives.

DTW 2024 Consumer Confidence Report

SOURCE WATER INFORMATION

Your source water comes from the Detroit River, situated within the Lake St. Clair, Clinton River, Detroit River, Rouge River, Ecorse River, watersheds in the U.S. and parts of the Thames River, Little River, Turkey Creek, and Sydenham watersheds in Canada. The Michigan Department of Environmental Quality in partnership with the U.S. Geological Survey, the Detroit Water and Sewerage Department, and the Michigan Public Health Institute performed a source water assessment in 2004 to determine the susceptibility of GLWA's Detroit River source water for potential contamination. The susceptibility rating is based on a seven-tiered scale and ranges from very low to very high determined primarily using geologic sensitivity, water chemistry, and potential contaminant sources. The report described GLWA's Detroit River intakes as highly susceptible to potential contamination. GLWA's Springwells and Southwest water treatment plants that draw water from the Detroit River have historically provided satisfactory treatment and meets drinking water standards.

Our water system is a shared responsibility.

GLWA has initiated source-water protection activities that include chemical containment, spill response, and a mercury reduction program. GLWA participates in the National Pollutant Discharge Elimination System permit discharge program and has an emergency response management plan. GLWA has an updated Surface Water Intake Protection plan for the Fighting Island Intake. The plan has seven elements that include: roles and duties of government units and water supply agencies, delineation of a source water protection areas, identification of potential sources of contamination, management approaches for protection, contingency plans, siting of new water sources, public participation, and public education activities. If you would like to know more information about the Source Water Assessment Report, please contact GLWA at (313) 926-8127).

DTW 2024 Consumer Confidence Report

As a water supplier to the Detroit Metropolitan Airport, the Great Lakes Water Authority (GLWA) is required to notify water users of any unresolved significant deficiencies identified by the Michigan Department of Environment, Great Lakes, and Energy, Drinking Water and Environment Health Division (EGLE). Below is the status of significant deficiencies in the GLWA water system identified by EGLE:

WCAA and the Great Lakes Water Authority are committed to safeguarding our water supply and delivering the highest quality drinking water to protect public health. Please contact us with any questions or concerns about your water.

For more information please contact:

Jason O. Ferrall

Department of Environment & Sustainability Wayne County Airport Authority Berry Administration Building Detroit Metropolitan Airport, 11050 Rogell Dr. Detroit MI 48242 Office: (734) 247 2780 Mon-Fri, 8:00am to 4:30pm

DTW 2024 Consumer Confidence Report

IMPORTANT INFORMATION ABOUT YOUR DRINKING WATER

Reporting Requirements Not Met for GLWA Springwells

We are required to monitor your drinking water for specific contaminants on a regular basis. Results of regular monitoring are an indicator of whether or not our drinking water meets health standards. We routinely monitoring your water for turbidity (cloudiness). This tells us whether we are effectively filtering the water supply. We did not monitor individual filter turbidity for five hours on September 2, 2024, due to an interruption of power at the GLWA Springwells Water Treatment Plant.

“Turbidity has no health effects. However, turbidity can interfere with disinfection and provide a medium for microbial growth. Turbidity may indicate the presence of disease causing organisms. These organisms include bacteria, viruses, and parasites which can cause symptoms such as nausea, cramps, diarrhea, and associated headaches.” These symptoms are not caused only by organisms in drinking water. If you experience any of these symptoms and they persist, you may want to seek medical advice.

What should I do? There is nothing you need to do at this time. This is not an emergency. You do not need to boil water or use an alternative source of water at this time. Even though this is not an emergency, as our customers, you have a right to know what happened and what we did to correct the situation.

What happened? What is being done? Power was restored and turbidity monitoring resumed on September 2, 2024. Additional response actions have also been implemented at the plant. We are making every effort to ensure this does not happen again.

For more information, please contact GLWA Water Quality, at waterquality@glwater.org Please share this information with all the other people who drink this water, especially those who may not have received this notice directly (for example, people in apartments, nursing homes, schools, and businesses). You can do this by posting this notice in a public place or distributing copies by hand or mail. This notice is being sent to you by GLWA.

CERTIFICATION:

WSSN: 02838

I certify that this water supply has fully complied with the public notification regulations in the Michigan Safe Drinking Water Act, 1976 PA 399, as amended, and the administrative rules.

Signature: Patrick Williford Title: Water Quality Manager Date Distributed:_____

2024 Detroit Metro Airport (DTW) Regulated Detected Contaminants Table

These tables are based on tests conducted by the WCAA in the year 2024. The WCAA conducts tests throughout the year, only tests that show the presence of a substance or require special monitoring are presented in these tables. The data is representative of the water quality, but some may be more than one year old.

2024 Southwest Regulated Detected Contaminants Table

2024 Disinfection Residual - Monitoring in the Distribution System

These tables are based on tests conducted by GLWA in the year 2024 or the most recent testing done within the last five calendar years. GLWA conducts tests throughout the year only tests that show the presence of a substance or require special monitoring are presented in these tables. The State allows us to monitor for certain contaminants less than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year. The data is representative of the water quality, but some are more than one year old.

About Unregulated Contaminant Monitoring

Unregulated contaminants are those for which EPA has not established drinking water standards. Monitoring helps EPA to determine where these contaminants occur and whether it needs to regulate those contaminants.

2024 Springwells Regulated Detected Contaminants Table

2024 Disinfection Residual - Monitoring in the Distribution System

2024 Special Monitoring

These tables are based on tests conducted by GLWA in the year 2024 or the most recent testing done within the last five calendar years. GLWA conducts tests throughout the year only tests that show the presence of a substance or require special monitoring are presented in these tables. The State allows us to monitor for certain contaminants less than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year. The data is representative of the water quality, but some are more than one year old.

About Unregulated Contaminant Monitoring

Unregulated contaminants are those for which EPA has not established drinking water standards. Monitoring helps EPA to determine where these contaminants occur and whether it needs to regulate those contaminants.

Key to the Detected Contaminants Table

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 1.16 0.24 0.53 0.56 0.62 1.16 0.49 0.35 0.64 0.29 0.41 0.78 0.24 0.43 0.36 0.3/95% (1) 0.25

Total Solids mg/L 146 112 124 118 112 115 123 125 120 130 123 146 123 128 119 500 10 9

Total Dissolved Solids mg/L 133 86 112 104 92 86 113 122 100 129 125 128 108 133 106 500 10 15

Aluminum mg/L 0.041 0.003 0.012 0.010 0.023 0.041 0.011 0.005 0.013 0.003 0.006 AE AE 0.007 0.005 0.05-0.2 0.001 0.012

Iron mg/L 0.3 0.2 0.2 0.2 0.2 0.3 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.1 0.054

Copper mg/L 0.009 0.003 0.005 0.009 0.005 0.004 0.004 0.003 0.006 0.005 0.007 0.006 0.003 0.005 0.006 1.3 (AL) 0.001 0.002

Magnesium mg/L 8.1 7.3 7.7 7.5 7.6 7.3 7.9 7.9 8.1 7.6 7.8 7.7 7.4 7.5 7.9 0.1 0.23

Calcium mg/L 27.9 24.1 26.2 25.5 24.1 25.2 26.8 26.8 27.9 26.1 26.4 27.2 25.4 25.8 27.4 0.1 1.1

Sodium mg/L 5.3 0.5 4.3 4.3 5.1 5.3 0.5 5.2 5.3 5.2 5.1 5.0 4.9 0.5 5.2 20 (2) 0.1 1.80

Potassium mg/L 1.1 1.0 1.0 1.0 1.0 1.0 1.1 1.1 1.1 1.0 1.0 1.1 1.0 1.0 1.0 0.1 0.04

Manganese mg/L 0.004 ND 0.001 0.001 0.002 0.004 <0.001 <0.001 0.002 <0.001 <0.001 0.001 <0.001 <0.001 <0.001 0.05 0.001 0.001

Lead mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.015 (AL) 0.001

Zinc mg/L 0.005 ND 0.003 0.002 0.003 AE 0.002 <0.001 0.005 0.003 0.005 0.003 0.002 0.003 0.004 5 0.001 0.00

Silica mg/L 2.1 1.6 1.9 2.0 2.1 2.1 2.0 1.7 1.6 1.8 1.9 1.8 1.6 1.9 2.0 0.4 0.2

Sulfate mg/L 28.4 15.2 17.4 16.5 16.1 16.1 28.4 15.4 16.1 15.8 18.4 18.2 16.9 15.5 15.2 3.6

Chloride mg/L 9.2 7.5 8.4 8.7 7.9 9.0 8.1 9.0 8.9 8.2 7.5 9.2 8.5 7.6 8.2 250 5 0.6

Phosphorus mg/L ND ND 0.00 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 0.05

Free Carbon Dioxide mg/L 1.8 0.7 1.2 1.3 1.8 1.7 1.0 1.1 1.3 0.9 0.8 1.1 0.7 1.0 1.1 0.3

Total Hardness (3), (4), (5) mg/L 110 88 99 102 102 104 104 110 98 90 88 96 88 104 104 7

Total Alkalinity (3) mg/L 90 82 86 86 82 86 84 88 90 88 86 86 84 84 82 2

Carbonate Alkalinity (3) mg/L 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0

Bi-Carbonate Alkalinity (3) mg/L 89 81 84 85 81 85 82 87 89 86 84 85 82 83 81 2

Non-Carbonate Hardness (3) mg/L 22 2 14 16 20 18 20 22 8 2 2 10 4 20 22 8

Chemical Oxygen Demand mg/L 11.4 2.4 5.9 3.2 5.5 11.4 8.7 9.1 9.2 7.6 2.7 2.4 3.5 3.4 3.7 2 3.1

Dissolved Oxygen mg/L 13.5 8.2 10.5 11.5 13.5 13.0 11.8 11.8 9.7 9.4 8.2 8.2 8.7 9.3 10.7 1.8

Nitrite Nitrogen mg/L ND ND 0.0 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 0.1

Nitrate Nitrogen mg/L 0.39 0.19 0.29 0.34 0.34 0.32 0.39 0.34 0.34 0.29 0.20 0.22 0.19 0.25 0.23 10 10 0.1 0.07

Fluoride mg/L 0.10 0.07 0.09 0.09 0.09 0.09 0.07 0.09 0.09 0.09 0.10 0.09 0.08 0.09 0.08 4 0.5 0.01

pH 8.40 7.96 8.18 8.10 7.96 8.00 8.20 8.20 8.14 8.30 8.30 8.20 8.40 8.20 8.15 6.5-8.5 6.5-8.5 0.12

Specific Conductance @25 °C. \mu moles 217 131 187 172 186 181 217 213 189 166 131 209 196 204 176 24

Temperature °C 23.0 4.4 16.1 4.4 11.3 11.2 13.5 15.3 17.8 18.4 23.0 22.7 21.2 18.3 16.6 5.4

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.4 5.1 5.8 GPG

Modified: 01/13/2025, 17:27

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 0.10 0.04 0.07 0.04 0.09 0.06 0.04 0.05 0.07 0.09 0.10 0.09 0.09 0.06 0.04 0.3/95% (1) 0.02

Total Solids mg/L 156 89 125 128 89 121 122 144 139 144 117 156 94 113 133 500 10 20

Total Dissolved Solids mg/L 140 92 113 105 95 122 99 126 92 140 124 115 116 116 105 500 10 14

Aluminum mg/L 0.084 0.022 0.043 0.024 0.026 0.022 0.024 0.027 0.039 0.072 0.060 0.084 0.073 0.044 0.023 0.05-0.2 0.001 0.023

Iron mg/L 0.3 0.2 0.2 0.2 0.2 0.3 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.1 0.047

Copper mg/L 0.005 ND 0.001 < 0.001 < 0.001 0.002 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.005 0.001 1.3 (AL) 0.001 0.002

Magnesium mg/L 8.0 7.4 7.6 7.5 7.4 7.5 7.8 7.7 7.9 7.6 7.5 7.7 7.6 7.5 8.0 0.1 0.19

Calcium mg/L 27.9 23.3 26.2 25.5 23.3 26.0 27.2 26.5 27.3 26.2 25.8 26.9 25.9 25.6 27.9 0.1 1.2

Sodium mg/L 5.3 0.5 4.3 4.3 5.1 5.3 0.5 5.1 5.3 5.2 5.2 5.0 4.9 0.5 5.2 20 (2) 1.79

Potassium mg/L 1.1 1.0 1.0 1.0 1.0 1.0 1.1 1.0 1.1 1.0 1.0 1.0 1.0 1.0 1.0 0.1 0.03

Manganese mg/L 0.001 ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.001 <0.001 0.05 0.001

Lead mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.015 (AL) 0.001

Zinc mg/L 0.010 ND 0.003 0.002 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.005 5 0.001 0.00

Silica mg/L 2.4 1.9 2.2 2.2 2.3 2.2 2.3 2.3 2.4 1.9 2.1 2.0 2.1 2.0 2.3 0.4 0.2

Sulfate mg/L 32.8 18.1 21.4 20.3 20.6 18.9 32.8 18.8 18.1 19.9 20.7 23.0 23.9 21.5 18.8 4.0

Chloride mg/L 11.0 9.0 9.9 10.0 9.0 11.0 9.0 11.0 10.5 9.7 10.2 10.0 9.7 9.8 9.1 250 5 0.7

Phosphorus mg/L 0.68 0.37 0.48 0.37 0.49 0.55 0.43 0.41 0.45 0.42 0.42 0.41 0.55 0.54 0.68 0.05 0.09

Free Carbon Dioxide mg/L 7.8 4.6 6.2 6.0 6.6 7.8 4.6 6.6 6.2 6.5 4.8 6.2 4.7 7.4 7.2 1.1

Total Hardness (3), (4), (5) mg/L 106 88 99 104 106 102 104 106 100 88 90 102 88 104 98 7

Total Alkalinity (3) mg/L 82 74 77 76 76 78 74 80 80 82 76 78 74 74 74 3

Carbonate Alkalinity (3) mg/L 6 0 0 0 0 0 6 0 0 0 0 0 0 0 0 2

Bi-Carbonate Alkalinity (3) mg/L 82 63 76 76 76 78 63 80 80 82 76 78 74 74 74 5

Non-Carbonate Hardness (3) mg/L 30 6 23 28 30 24 30 26 20 6 14 24 14 30 24 8

Chemical Oxygen Demand mg/L 8.7 2.0 4.4 2.1 4.1 3.8 5.3 6.5 8.7 7.5 2.0 2.8 2.1 3.6 4.7 2 2.2

Dissolved Oxygen mg/L 12.9 8.3 10.3 10.5 12.7 12.9 12.0 10.2 10.0 9.6 8.3 8.4 8.9 9.3 11.0 1.6

Nitrite Nitrogen mg/L ND ND 0.0 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 0.1

Nitrate Nitrogen mg/L 0.40 0.20 0.28 0.34 0.35 0.33 0.40 0.32 0.35 0.27 0.20 0.21 0.20 0.20 0.23 10 10 0.1 0.07

Fluoride mg/L 0.80 0.51 0.72 0.73 0.80 0.74 0.51 0.74 0.79 0.80 0.78 0.75 0.69 0.71 0.60 4 0.5 0.09

pH 7.50 7.30 7.39 7.40 7.36 7.30 7.44 7.39 7.41 7.40 7.50 7.40 7.50 7.30 7.31 6.5-8.5 6.5-8.5 0.07

Specific Conductance @25 °C. μm/hos 222 135 189 183 190 183 222 205 196 163 135 210 201 205 180 23

Temperature °C 22.8 8.9 16.1 9.6 9.5 8.9 12.4 14.5 17.2 21.6 22.8 22.4 21.0 18.9 14.8 5.3

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.1 5.1 5.8 GPG

Modified: 01/13/2025, 17:27

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 18.00 1.10 4.47 18.00 1.57 5.18 3.50 2.50 1.26 1.10 1.53 2.00 1.40 4.20 11.40 0.3/95% (1) 5.14

Total Solids mg/L 145 107 128 132 107 123 121 145 135 132 122 129 123 131 140 500 10 10

Total Dissolved Solids mg/L 148 79 117 103 79 85 115 124 122 139 124 110 146 148 114 500 10 22

Aluminum mg/L 0.463 0.031 0.116 0.463 0.052 0.141 0.097 0.047 AE 0.032 AE AE 0.031 0.080 0.104 0.05-0.2 0.001 0.135

Iron mg/L 0.9 0.2 0.4 0.9 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.2 0.2 0.3 0.4 12.000 0.3 0.1 0.187

Copper mg/L 0.045 0.019 0.033 0.029 0.028 0.040 0.039 0.034 0.032 0.019 0.033 0.031 0.039 0.045 0.032 1.3 (AL) 0.001 0.007

Magnesium mg/L 8.1 7.0 7.4 8.1 7.5 7.4 7.3 7.6 7.0 7.6 7.7 7.0 7.1 7.0 8.0 0.1 0.38

Calcium mg/L 28.3 24.1 25.8 27.7 24.1 25.9 25.4 27.4 24.2 25.3 26.4 25.2 25.3 24.8 28.3 0.1 1.4

Sodium mg/L 5.9 0.5 4.5 4.7 5.1 5.2 0.5 5.7 5.3 5.5 5.6 5.1 4.9 0.5 5.9 20 (2) 0.1 1.90

Potassium mg/L 1.3 0.9 1.1 1.3 1.1 1.1 1.0 1.1 0.9 1.0 1.2 1.0 1.0 1.0 1.1 0.1 0.10

Manganese mg/L 0.010 0.002 0.003 0.010 0.002 0.004 0.003 0.002 0.002 0.002 0.003 0.002 0.002 0.003 0.005 0.05 0.001 0.003

Lead mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.015 (AL) 0.001

Zinc mg/L 0.004 ND 0.001 0.003 0.002 AE AE <0.001 AE <0.001 <0.001 AE AE 0.004 0.001 5 0.001 0.00

Silica mg/L 2.6 1.3 1.9 2.1 2.1 2.0 1.8 1.3 1.5 1.5 2.2 1.7 1.9 1.9 2.6 0.4 0.4

Sulfate mg/L 28.2 14.3 18.3 20.2 17.0 18.0 28.2 14.3 16.0 17.3 19.8 17.8 18.2 14.5 17.8 3.6

Chloride mg/L 10.2 7.8 8.8 10.0 8.1 8.0 7.8 10.2 9.2 9.0 8.5 9.2 8.5 8.3 8.4 250 5 0.8

Phosphorus mg/L ND ND 0.00 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 0.05

Free Carbon Dioxide mg/L 1.7 0.4 1.0 1.2 1.0 1.4 1.0 0.8 0.9 0.4 0.5 0.8 1.1 1.1 1.7 0.4

Total Hardness (3), (4), (5) mg/L 112 86 98 104 98 96 104 112 102 86 88 92 90 100 100 8

Total Alkalinity (3) mg/L 96 82 88 88 86 82 84 96 92 90 88 88 86 86 86 4

Carbonate Alkalinity (3) mg/L 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0

Bi-Carbonate Alkalinity (3) mg/L 94 81 86 87 85 81 82 94 90 86 85 86 85 85 85 3

Non-Carbonate Hardness (3) mg/L 20 -4 10 16 12 14 20 16 10 -4 0 4 4 14 14 7

Chemical Oxygen Demand mg/L 10.2 ND 5.8 5.0 5.6 5.3 10.1 7.9 10.2 8.4 3.9 5.9 3.4 3.9 <2 2 2.4

Dissolved Oxygen mg/L 13.9 8.1 10.7 13.9 13.4 13.8 10.6 11.2 8.7 9.6 8.1 8.4 8.6 9.1 12.7 2.2

Nitrite Nitrogen mg/L ND ND 0.0 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 0.1

Nitrate Nitrogen mg/L 0.55 0.18 0.31 0.55 0.39 0.27 0.38 0.47 0.31 0.22 0.28 0.18 0.19 0.24 0.27 10 10 0.1 0.11

Fluoride mg/L 0.81 0.07 0.15 0.09 0.08 0.09 0.07 0.09 0.10 0.10 0.10 0.81 0.08 0.08 0.08 4 0.5 0.21

pH 8.66 7.99 8.27 8.16 8.23 8.07 8.20 8.38 8.29 8.66 8.51 8.33 8.18 8.20 7.99 6.5-8.5 6.5-8.5 0.18

Specific Conductance @25 °C. \mu moles 223 144 190 184 191 177 223 200 189 161 144 212 206 208 185 22

Temperature °C 23.0 2.8 15.0 2.8 18.2 6.2 11.2 15.0 18.0 23.0 22.9 20.7 19.0 16.0 6.6 6.8

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.5 5.0 5.7 GPG

Modified: 01/13/2025, 17:27

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 1.50 0.05 0.27 0.08 1.50 0.12 0.18 0.08 0.20 0.26 0.35 0.05 0.10 0.09 0.24 0.3/95% (1) 0.40

Total Solids mg/L 158 125 140 135 130 129 139 158 148 148 125 134 143 153 142 500 10 10

Total Dissolved Solids mg/L 153 101 126 109 111 106 101 133 110 143 142 153 132 148 128 500 10 18

Aluminum mg/L 0.118 0.023 0.054 0.091 0.030 0.052 0.037 0.023 0.041 0.063 0.057 0.044 0.046 0.050 0.118 0.05-0.2 0.001 0.027

Iron mg/L 0.4 0.2 0.2 0.2 0.2 0.3 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.1 0.062

Copper mg/L 0.032 ND 0.004 0.001 < 0.001 0.001 0.001 0.001 0.001 0.001 0.001 < 0.001 < 0.001 0.002 0.032 1.3 (AL) 0.001 0.010

Magnesium mg/L 8.2 7.5 7.8 7.9 7.5 8.0 7.9 8.1 8.2 7.7 7.7 7.8 7.5 7.6 8.1 0.1 0.24

Calcium mg/L 29.3 23.3 27.2 27.8 23.3 27.9 27.2 29.3 28.2 26.2 27.0 27.3 26.6 26.7 28.9 0.1 1.6

Sodium mg/L 6.1 0.5 4.6 5.0 5.2 5.2 0.5 6.1 5.7 5.5 5.7 5.2 5.1 0.5 5.7 20 (2) 1.95

Potassium mg/L 1.2 1.0 1.1 1.1 1.0 1.1 1.1 1.2 1.1 1.0 1.2 1.1 1.1 1.0 1.1 0.1 0.06

Manganese mg/L 0.005 ND 0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.001 <0.001 <0.001 0.001 0.005 0.05 0.001 0.002

Lead mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.015 (AL) 0.001

Zinc mg/L 0.002 ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.001 0.002 5 0.001 0.00

Silica mg/L 3.6 1.5 2.2 1.5 2.5 2.4 1.9 1.5 2.2 1.7 3.6 1.9 2.1 2.2 3.2 0.4 0.6

Sulfate mg/L 38.3 24.1 30.5 36.0 28.6 32.8 38.3 35.5 27.2 27.6 31.9 29.5 27.2 24.1 27.6 4.3

Chloride mg/L 12.2 8.8 10.4 11.6 9.3 10.0 8.8 12.2 11.3 10.5 11.2 10.8 10.2 9.5 9.5 250 5

Phosphorus mg/L 0.61 0.38 0.47 0.39 0.47 0.44 0.41 0.45 0.49 0.51 0.38 0.46 0.40 0.61 0.58 0.05 0.07

Free Carbon Dioxide mg/L 18.1 6.6 9.6 11.8 7.3 8.3 7.3 11.7 8.7 7.5 11.7 8.6 6.6 7.2 18.1 3.3

Total Hardness (3), (4), (5) mg/L 114 90 102 104 106 104 112 114 106 96 90 102 92 94 100 8

Total Alkalinity (3) mg/L 76 64 70 68 70 64 64 74 76 72 72 70 72 72 64 4

Carbonate Alkalinity (3) mg/L 10 0 1 0 0 0 10 0 0 0 0 0 0 0 0 3

Bi-Carbonate Alkalinity (3) mg/L 76 46 68 68 70 64 46 74 76 72 72 70 72 72 64 8

Non-Carbonate Hardness (3) mg/L 48 18 32 36 36 40 48 40 30 24 18 32 20 22 36 9

Chemical Oxygen Demand mg/L 8.7 ND 4.2 <2 5.3 3.6 6.4 5.8 8.7 7.7 2.6 2.2 2.4 2.8 2.3 2 2.4

Dissolved Oxygen mg/L 16.9 8.4 11.4 16.9 15.4 15.8 10.6 11.0 9.0 9.6 8.4 9.2 9.1 9.7 12.5 3.0

Nitrite Nitrogen mg/L ND ND 0.0 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 0.1

Nitrate Nitrogen mg/L 0.48 0.17 0.29 0.46 0.31 0.28 0.38 0.48 0.33 0.21 0.28 0.17 0.17 0.19 0.26 10 10 0.1 0.11

Fluoride mg/L 0.82 0.39 0.68 0.57 0.66 0.70 0.53 0.72 0.78 0.72 0.82 0.81 0.74 0.67 0.39 4 0.5 0.13

pH 7.34 6.85 7.17 7.06 7.28 7.19 7.10 7.10 7.24 7.28 7.09 7.21 7.34 7.30 6.85 6.5-8.5 6.5-8.5 0.14

Specific Conductance @25 °C. μm/hos 231 151 199 197 197 183 231 218 203 166 151 218 208 214 200 23

Temperature °C 22.6 2.9 13.5 2.9 8.4 5.1 11.3 14.3 17.7 22.0 22.6 20.0 18.6 14.2 4.6 7.0

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.6 5.2 5.9 GPG

Modified: 01/13/2025, 17:27

Plant Name:

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 16.20 1.50 3.72 16.20 2.36 1.50 3.10 1.56 1.70 1.95 1.74 1.60 2.90 3.70 6.29 0.3/95% (1) 4.16

Total Solids mg/L 156 105 132 130 105 109 130 146 134 140 127 156 133 153 122 500 10 16

Total Dissolved Solids mg/L 148 88 121 105 88 112 106 123 148 137 123 138 120 140 108 500 10 18

Aluminum mg/L 0.382 0.031 0.085 0.382 0.056 0.036 0.041 0.031 AE 0.046 0.041 0.046 0.050 0.093 0.111 0.05-0.2 0.001 0.102

Iron mg/L 0.8 0.3 0.3 0.8 0.3 0.3 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.4 0.4 0.3 0.1 0.139

Copper mg/L 0.003 ND 0.001 0.001 <0.001 AE AE <0.001 AE 0.002 0.002 0.002 0.002 0.003 0.001 1.3 (AL) 0.001 0.001

Magnesium mg/L 7.7 6.9 7.3 7.6 7.5 6.9 7.4 7.5 7.3 7.1 7.7 7.2 7.1 7.3 7.4 0.1 0.22

Calcium mg/L 26.8 23.7 25.5 25.7 26.5 24.4 26.2 26.8 25.7 24.3 26.1 25.4 25.7 25.5 23.7 0.1 0.9

Sodium mg/L 5.4 0.5 4.3 4.4 5.1 5.0 0.5 5.3 5.4 5.3 5.2 4.9 4.9 0.6 5.2 20 (2) 0.1 1.76

Potassium mg/L 1.2 0.9 1.0 1.2 1.0 1.0 1.0 1.1 1.0 0.9 1.0 1.0 1.0 1.1 1.0 0.1 0.06

Manganese mg/L 0.007 0.001 0.003 0.007 0.002 0.001 0.002 0.002 0.004 0.004 0.004 0.003 0.003 0.005 0.004 0.05 0.001 0.002

Lead mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.015 (AL) 0.001

Zinc mg/L 0.003 ND 0.002 0.003 0.001 AE AE <0.001 AE AE 0.001 AE AE 0.003 0.002 5 0.001 0.00

Silica mg/L 2.2 1.3 1.8 2.1 2.2 2.1 1.4 1.3 1.7 1.6 1.8 1.6 1.9 1.9 2.2 0.4 0.3

Sulfate mg/L 29.1 15.1 17.9 19.2 16.3 16.1 29.1 15.1 15.9 15.6 16.4 19.4 17.7 19.0 15.4 3.8

Chloride mg/L 10.2 7.5 8.5 9.5 7.9 7.5 9.0 9.2 8.7 8.2 8.0 8.2 8.5 10.2 7.5 250 5 0.8

Phosphorus mg/L ND ND 0.00 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 0.05

Free Carbon Dioxide mg/L 2.7 0.2 1.0 1.2 1.2 0.8 0.2 0.9 1.1 0.5 0.7 0.9 1.0 2.7 1.3 0.6

Total Hardness (3), (4), (5) mg/L 115 84 98 102 104 100 114 115 100 88 84 84 92 94 96 10

Total Alkalinity (3) mg/L 94 82 87 90 82 82 88 94 92 92 86 84 85 86 82 4

Carbonate Alkalinity (3) mg/L 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0

Bi-Carbonate Alkalinity (3) mg/L 92 61 83 89 81 80 61 92 91 89 84 82 84 85 81 8

Non-Carbonate Hardness (3) mg/L 26 -4 11 12 22 18 26 21 8 -4 -2 0 7 8 14 10

Chemical Oxygen Demand mg/L 9.2 3.9 6.3 5.0 5.1 6.4 9.2 8.4 8.4 8.4 5.7 4.2 3.9 4.0 6.3 2 1.9

Dissolved Oxygen mg/L 14.9 7.4 11.1 14.1 14.2 12.7 11.8 10.0 7.4 8.0 8.4 13.6 8.1 10.7 14.9 2.7

Nitrite Nitrogen mg/L ND ND 0.0 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 0.1

Nitrate Nitrogen mg/L 0.39 0.18 0.29 0.37 0.39 0.29 0.39 0.35 0.32 0.22 0.18 0.18 0.21 0.31 0.21 10 10 0.1 0.08

Fluoride mg/L 0.10 0.07 0.09 0.09 0.09 0.09 0.07 0.09 0.09 0.09 0.10 0.09 0.09 0.09 0.08 4 0.5 0.01

pH 8.53 7.80 8.23 8.17 8.14 8.30 8.32 8.33 8.21 8.53 8.36 8.27 8.23 7.80 8.11 6.5-8.5 6.5-8.5 0.18

Specific Conductance @25 °C. \mu moles 233 136 192 176 197 186 223 220 190 160 136 206 204 233 170 28

Temperature °C 23.0 5.7 14.6 5.7 8.4 7.0 11.2 15.1 17.8 22.9 23.0 21.1 18.8 15.9 8.0 6.3

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.7 4.9 5.7 GPG

Modified: 01/13/2025, 17:27

Plant Name:

Water Works Park (WWP)

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 0.70 0.03 0.13 0.03 0.06 0.05 0.05 0.05 0.70 0.13 0.12 0.17 0.04 0.08 0.07 0.3/95% (1) 0.18

Total Solids mg/L 160 121 139 127 127 121 131 155 127 152 125 160 141 152 152 500 10 14

Total Dissolved Solids mg/L 140 97 120 117 107 97 102 134 122 139 127 140 110 122 119 500 10 14

Aluminum mg/L 0.293 0.012 0.075 0.012 0.022 0.017 0.030 0.094 0.053 0.105 0.293 0.161 0.062 0.037 0.016 0.05-0.2 0.001 0.082

Iron mg/L 0.3 0.2 0.2 0.2 0.2 0.3 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.1 0.056

Copper mg/L 0.001 ND 0.000 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.001 < 0.001 1.3 (AL) 0.001

Magnesium mg/L 8.1 7.4 7.7 7.7 7.4 7.6 7.7 8.0 8.1 7.8 7.7 7.8 7.6 7.5 8.0 0.1 0.21

Calcium mg/L 28.1 2.6 24.9 2.6 25.7 26.4 26.9 27.9 28.1 25.9 26.8 28.0 26.6 25.9 28.0 0.1 7.1

Sodium mg/L 6.0 0.5 4.6 4.5 5.1 5.9 0.5 5.4 5.7 5.9 5.4 5.1 5.1 0.5 6.0 20 (2) 1.95

Potassium mg/L 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.1 1.1 1.0 1.1 1.1 1.1 1.0 1.1 0.1 0.03

Manganese mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.05 0.001

Lead mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.015 (AL) 0.001

Zinc mg/L 0.003 ND 0.002 0.002 0.002 0.003 0.002 <0.001 0.003 0.002 0.003 0.002 0.002 0.003 0.003 5 0.001 0.00

Silica mg/L 3.6 1.5 2.2 2.1 2.4 2.3 1.7 1.5 2.3 1.8 1.9 1.9 2.1 3.6 2.3 0.4 0.5

Sulfate mg/L 37.2 23.6 27.7 28.6 25.8 26.0 37.2 23.6 27.1 24.1 27.1 24.0 26.2 30.0 32.6 4.0

Chloride mg/L 11.8 9.5 10.5 10.8 9.8 10.0 9.5 11.2 11.8 11.7 10.5 10.3 10.0 10.5 9.5 250 5 0.8

Phosphorus mg/L 0.82 0.34 0.52 0.34 0.47 0.62 0.47 0.53 0.43 0.37 0.61 0.43 0.52 0.69 0.82 0.05 0.14

Free Carbon Dioxide mg/L 11.1 5.7 7.5 7.2 7.4 7.9 5.7 6.1 8.2 6.8 6.4 6.5 6.4 10.5 11.1 1.7

Total Hardness (3), (4), (5) mg/L 110 74 99 104 98 106 108 110 102 74 86 102 90 104 100 10

Total Alkalinity (3) mg/L 81 64 72 74 72 70 70 81 70 74 74 78 74 66 64 5

Carbonate Alkalinity (3) mg/L 7 0 1 0 0 0 7 0 0 0 0 0 0 0 0 2

Bi-Carbonate Alkalinity (3) mg/L 81 57 71 74 72 70 57 81 70 74 74 78 74 66 64 6

Non-Carbonate Hardness (3) mg/L 38 0 26 30 26 36 38 29 32 0 12 24 16 38 36 12

Chemical Oxygen Demand mg/L 7.8 ND 3.5 2.1 3.2 3.0 6.1 6.5 6.2 7.8 <2 <2 <2 4.8 2.4 2 2.1

Dissolved Oxygen mg/L 19.0 7.7 12.9 14.1 14.5 15.4 11.8 10.2 7.7 8.0 11.2 19.0 11.6 13.7 17.2 3.4

Nitrite Nitrogen mg/L ND ND 0.0 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 0.1

Nitrate Nitrogen mg/L 0.39 ND 0.25 0.37 0.38 0.27 0.39 0.34 0.30 0.21 0.17 0.18 0.19 <0.1 0.25 10 10 0.1 0.08

Fluoride mg/L 0.78 0.43 0.63 0.54 0.55 0.71 0.43 0.56 0.68 0.70 0.66 0.66 0.55 0.78 0.71 4 0.5 0.10

pH 7.42 7.06 7.28 7.31 7.29 7.25 7.30 7.42 7.23 7.34 7.36 7.38 7.36 7.10 7.06 6.5-8.5 6.5-8.5 0.11

Specific Conductance @25 °C. μm/hos 226 138 194 182 196 193 226 210 202 163 138 211 205 215 182 24

Temperature °C 21.9 6.9 14.4 6.9 8.0 7.0 12.0 14.0 18.0 21.8 21.9 21.0 18.2 15.3 8.5 5.8

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.4 4.3 5.7 GPG

Modified: 01/13/2025, 17:27

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 0.07 0.02 0.06 0.07 0.04 0.02 0.04 0.06 0.07 0.03 0.05 0.07 0.07 0.07 0.07 0.3/95% (1) 0.02

Total Solids mg/L 147 76 128 128 123 127 130 136 140 144 129 147 131 120 76 500 10 18

Total Dissolved Solids mg/L 148 102 122 102 108 113 109 127 126 148 139 138 124 115 112 500 10 14

Aluminum mg/L 0.104 0.024 0.050 0.094 0.052 0.024 0.028 0.029 0.034 0.087 0.033 0.050 0.030 0.033 0.104 0.05-0.2 0.001 0.029

Iron mg/L 0.3 0.2 0.2 0.2 0.2 0.3 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.1 0.058

Copper mg/L 0.032 ND 0.004 0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 <0.001 0.001 0.002 0.032 1.3 (AL) 0.001 0.009

Magnesium mg/L 8.1 7.5 7.8 7.7 7.5 8.1 8.0 8.0 8.1 7.6 7.5 7.6 7.5 7.5 8.1 0.1 0.27

Calcium mg/L 29.0 25.8 27.3 26.6 28.1 27.7 28.0 28.4 28.0 25.8 26.4 26.8 26.7 26.1 29.0 0.1 1.0

Sodium mg/L 6.0 0.5 4.6 4.6 5.3 5.4 0.5 5.5 5.7 6.0 5.4 5.2 5.2 0.5 5.7 20 (2) 0.1 1.93

Potassium mg/L 1.1 1.0 1.1 1.0 1.0 1.1 1.1 1.1 1.1 1.0 1.0 1.0 1.0 1.0 1.1 0.1 0.04

Manganese mg/L 0.005 ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.005 0.05 0.001

Lead mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.015 (AL) 0.001

Zinc mg/L 0.002 ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 0.002 <0.001 <0.001 <0.001 <0.001 <0.001 0.001 5 0.001 0.00

Silica mg/L 2.3 1.5 2.0 2.1 2.3 2.2 2.1 1.5 1.8 1.7 1.9 1.7 2.3 2.3 2.2 0.4 0.3

Sulfate mg/L 40.0 21.6 29.3 40.0 29.5 27.7 37.4 26.8 23.9 24.1 29.7 29.3 32.1 21.6 29.7 5.3

Chloride mg/L 11.7 9.5 10.6 10.8 9.8 9.5 9.9 11.5 11.6 11.7 10.7 10.8 10.5 9.5 10.7 250 5 0.8

Phosphorus mg/L 0.70 0.43 0.53 0.43 0.45 0.57 0.46 0.54 0.54 0.46 0.67 0.53 0.43 0.59 0.70 0.05 0.09

Free Carbon Dioxide mg/L 15.1 6.3 10.4 15.1 10.4 10.9 6.3 9.2 8.6 7.4 11.2 8.7 11.1 13.4 12.3 2.5

Total Hardness (3), (4), (5) mg/L 108 88 99 100 106 101 108 106 100 88 90 105 90 90 98 7

Total Alkalinity (3) mg/L 80 60 72 60 70 70 72 78 80 76 74 72 70 72 66 5

Carbonate Alkalinity (3) mg/L 8 0 1 0 0 0 8 0 0 0 0 0 0 0 0 2

Bi-Carbonate Alkalinity (3) mg/L 80 57 70 60 70 70 57 78 80 76 74 72 70 72 66 7

Non-Carbonate Hardness (3) mg/L 40 12 27 40 36 31 36 28 20 12 16 33 20 18 32 9

Chemical Oxygen Demand mg/L 7.9 ND 4.0 <2 3.0 4.1 7.2 7.0 7.9 6.1 2.4 <2 2.5 5.2 2.0 2 2.2

Dissolved Oxygen mg/L 13.1 6.7 9.6 13.1 11.8 12.7 11.0 8.1 9.4 8.9 8.9 6.9 6.7 9.7 7.9 2.1

Nitrite Nitrogen mg/L ND ND 0.0 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 0.1

Nitrate Nitrogen mg/L 0.39 0.18 0.26 0.37 0.32 0.26 0.39 0.33 0.30 0.21 0.19 0.18 0.18 0.20 0.23 10 10 0.1 0.08

Fluoride mg/L 0.66 0.46 0.55 0.46 0.47 0.66 0.48 0.56 0.63 0.66 0.56 0.51 0.52 0.65 0.49 4 0.5 0.08

pH 7.31 6.90 7.14 6.90 7.13 7.11 7.26 7.23 7.27 7.31 7.12 7.22 7.10 7.03 7.03 6.5-8.5 6.5-8.5 0.12

Specific Conductance @25 °C. μm/hos 231 146 196 187 194 186 231 204 201 170 146 219 214 209 191 23

Temperature °C 23.2 8.4 16.0 8.4 10.9 10.1 13.1 16.6 18.4 23.0 23.2 22.4 19.7 16.4 10.3 5.4

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.3 5.1 5.7 GPG

Modified: 01/13/2025, 17:27

Plant Name: Springwells (SPW)

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 0.78 0.03 0.13 0.07 0.06 0.03 0.04 0.08 0.08 0.03 0.08 0.10 0.04 0.78 0.13 0.3/95% (1) 0.21

Total Solids mg/L 148 126 136 130 129 126 138 148 136 144 139 129 138 138 135 500 10 6

Total Dissolved Solids mg/L 150 92 120 98 100 92 111 127 130 150 132 130 141 123 110 500 10 18

Aluminum mg/L 0.088 0.020 0.037 0.029 0.030 0.025 0.026 0.020 0.032 0.088 0.033 0.038 0.035 0.058 0.023 0.05-0.2 0.001 0.019

Iron mg/L 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.1 0.051

Copper mg/L 0.002 ND 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.001 0.001 < 0.001 0.001 0.001 0.001 0.002 0.002 1.3 (AL) 0.001 0.000

Magnesium mg/L 8.6 6.7 7.8 7.6 6.7 7.7 8.1 8.1 8.6 7.5 7.6 8.0 7.7 7.5 8.2 0.1 0.48

Calcium mg/L 29.8 25.6 27.4 26.6 28.1 26.6 27.7 28.1 29.8 25.6 26.6 28.0 27.1 26.1 29.0 0.1 1.2

Sodium mg/L 8.9 0.5 4.8 4.5 5.2 5.2 0.5 5.6 5.9 5.9 5.3 5.2 5.1 0.5 8.9 20 (2) 2.28

Potassium mg/L 1.2 0.9 1.1 1.0 0.9 1.0 1.1 1.1 1.2 1.0 1.0 1.1 1.1 1.0 1.1 0.1 0.07

Manganese mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.05 0.001

Lead mg/L ND ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.015 (AL) 0.001

Zinc mg/L 0.002 ND 0.000 <0.001 <0.001 <0.001 <0.001 <0.001 0.002 <0.001 <0.001 <0.001 <0.001 <0.001 0.002 5 0.001 0.00

Silica mg/L 3.7 1.7 2.3 2.3 2.2 2.3 2.1 2.8 1.9 1.7 3.7 1.8 2.2 2.4 2.2 0.4 0.5

Sulfate mg/L 35.9 24.8 28.8 32.8 28.4 24.9 35.9 26.5 26.5 24.8 32.3 28.1 31.0 26.0 28.5 3.5

Chloride mg/L 13.2 9.9 11.1 10.5 10.2 10.0 9.9 11.5 13.2 11.7 11.2 11.3 11.7 11.4 10.2 250 5 0.9

Phosphorus mg/L 0.81 0.35 0.52 0.42 0.51 0.44 0.50 0.46 0.42 0.35 0.45 0.47 0.69 0.81 0.75 0.05 0.14

Free Carbon Dioxide mg/L 13.6 6.2 10.3 12.6 9.5 7.2 7.3 10.3 13.6 6.2 11.2 10.9 9.7 11.6 13.4 2.4

Total Hardness (3), (4), (5) mg/L 110 88 101 100 102 104 110 106 104 88 92 106 90 106 100 7

Total Alkalinity (3) mg/L 82 66 73 66 72 70 74 82 80 76 72 72 72 70 70 4

Carbonate Alkalinity (3) mg/L 9 0 1 0 0 0 9 0 0 0 0 0 0 0 0 3

Bi-Carbonate Alkalinity (3) mg/L 82 56 71 66 72 70 56 82 80 76 72 72 72 70 70 6

Non-Carbonate Hardness (3) mg/L 36 12 28 34 30 34 36 24 24 12 20 34 18 36 30 8

Chemical Oxygen Demand mg/L 8.3 ND 4.2 2.5 2.7 4.8 6.7 7.5 8.3 8.0 2.1 <2 2.5 2.6 3.2 2 2.5

Dissolved Oxygen mg/L 14.3 6.7 10.5 11.7 14.3 10.2 11.2 9.6 10.1 10.0 9.2 9.8 6.7 10.3 12.5 1.9

Nitrite Nitrogen mg/L ND ND 0.0 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 0.1

Nitrate Nitrogen mg/L 0.40 0.17 0.27 0.40 0.31 0.31 0.38 0.36 0.31 0.20 0.20 0.18 0.17 0.24 0.21 10 10 0.1 0.08

Fluoride mg/L 0.65 0.43 0.54 0.56 0.49 0.64 0.46 0.55 0.59 0.65 0.54 0.49 0.50 0.62 0.43 4 0.5 0.07

pH 7.39 7.02 7.15 7.02 7.18 7.29 7.19 7.20 7.07 7.39 7.11 7.12 7.17 7.08 7.02 6.5-8.5 6.5-8.5 0.11

Specific Conductance @25 °C. μm/hos 233 147 200 182 198 191 231 233 204 163 147 220 220 218 193 27

Temperature °C 23.2 1.9 13.7 1.9 4.5 5.0 10.3 13.9 18.5 23.0 23.2 20.4 19.0 16.4 8.6 7.5

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.4 5.1 5.8 GPG

Modified: 01/13/2025, 17:27

Plant Name:

Yearly Summary Monthly Mineral Analyses Annual Averages

Parameter Units Max. Min. Avg. 01/16/2024 02/13/2024 03/12/2024 04/16/2024 05/14/2024 06/11/2024 07/09/2024 08/13/2024 09/10/2024 10/08/2024 11/05/2024 12/10/2024 Sample Dates

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MCL Sec.Std RL STDEV

Turbidity N.T.U. 1.50 0.02 0.15 0.06 0.42 0.05 0.08 0.07 0.26 0.11 0.15 0.10 0.06 0.26 0.13 0.3/95% (1) 0.11

Total Solids mg/L 160 76 136 130 127 126 135 149 138 147 130 143 138 141 126 500 10 8

Total Dissolved Solids mg/L 153 92 122 107 107 102 106 130 122 145 135 140 127 127 117 500 10 15

Aluminum mg/L 0.293 0.012 0.054 0.056 0.034 0.030 0.030 0.041 0.040 0.086 0.104 0.074 0.043 0.045 0.065 0.05-0.2 0.001 0.024

Iron mg/L 0.4 0.2 0.2 0.2 0.2 0.3 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.1 0.052

Copper mg/L 0.032 ND 0.002 0.001 0.000 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.001 0.002 0.017 1.3 (AL) 0.001 0.005

Magnesium mg/L 8.6 6.7 7.8 7.7 7.3 7.8 7.9 8.1 8.3 7.7 7.6 7.8 7.6 7.5 8.1 0.1 0.28

Calcium mg/L 29.8 2.6 26.7 20.9 26.3 27.2 27.5 28.4 28.5 25.9 26.7 27.5 26.8 26.2 28.7 0.1 2.1

Sodium mg/L 8.9 0.5 4.7 4.6 5.2 5.4 0.5 5.6 5.7 5.8 5.4 5.2 5.1 0.5 6.6 20 (2) 0.1 1.99

Potassium mg/L 1.2 0.9 1.1 1.1 1.0 1.1 1.1 1.1 1.1 1.0 1.1 1.1 1.1 1.0 1.1 0.1 0.04

Manganese mg/L 0.005 ND 0.000 ND ND ND ND ND ND ND 0.000 ND ND 0.000 0.002 0.05 0.001 0.001

Lead mg/L ND ND 0.000 ND ND ND ND ND ND ND ND ND ND ND ND 0.015 (AL) 0.001

Zinc mg/L 0.003 ND 0.001 0.001 0.001 0.001 0.001 0.001 0.002 0.000 0.001 0.000 0.000 0.001 0.002 5 0.001 0.00

Silica mg/L 3.7 1.5 2.2 2.0 2.3 2.3 1.9 1.8 2.1 1.7 2.8 1.8 2.2 2.6 2.5 0.4 0.3

Sulfate mg/L 40.0 21.6 29.1 34.3 28.1 27.8 37.2 28.1 26.2 25.1 30.3 27.7 29.1 25.4 29.6 3.5

Chloride mg/L 13.2 8.8 10.6 10.9 9.8 9.9 9.5 11.6 12.0 11.4 10.9 10.8 10.6 10.2 10.0 250 5 0.8

Phosphorus mg/L 0.82 0.34 0.51 0.39 0.47 0.52 0.46 0.50 0.47 0.42 0.53 0.47 0.51 0.67 0.71 0.05 0.09

Free Carbon Dioxide mg/L 18.1 5.7 9.4 11.7 8.6 8.5 6.6 9.3 9.8 7.0 10.1 8.7 8.5 10.7 13.7 2.0

Total Hardness (3), (4), (5) mg/L 114 74 100 102 103 104 110 109 103 87 90 104 91 99 100 7

Total Alkalinity (3) mg/L 82 60 72 67 71 69 70 79 77 75 73 73 72 70 66 4

Carbonate Alkalinity (3) mg/L 10 0 1 0 0 0 8 0 0 0 0 0 0 0 0 2

Bi-Carbonate Alkalinity (3) mg/L 82 46 70 67 71 68 54 79 76 74 73 73 72 70 66 6

Non-Carbonate Hardness (3) mg/L 48 0 28 35 32 35 40 30 27 12 17 31 19 29 34 8

Chemical Oxygen Demand mg/L 8.7 ND 4.0 1.2 3.6 3.9 6.6 6.7 7.8 7.4 1.8 0.6 1.9 3.9 2.5 2 2.6

Dissolved Oxygen mg/L 19.0 6.7 11.1 14.0 14.0 13.5 11.2 9.7 9.1 9.1 9.4 11.2 8.5 10.8 12.5 2.0

Nitrite Nitrogen mg/L ND ND 0.0 ND ND ND ND ND ND ND ND ND ND ND ND 1 0.1

Nitrate Nitrogen mg/L 0.48 ND 0.27 0.40 0.33 0.28 0.39 0.38 0.31 0.21 0.21 0.18 0.17 0.16 0.24 10 10 0.1 0.09

Fluoride mg/L 0.82 0.39 0.60 0.53 0.54 0.68 0.47 0.60 0.67 0.68 0.64 0.62 0.58 0.68 0.51 4 0.5 0.07

pH 7.42 6.85 7.19 7.07 7.22 7.21 7.21 7.24 7.20 7.33 7.17 7.23 7.24 7.13 6.99 6.5-8.5 6.5-8.5 0.09

Specific Conductance @25 °C. μm/hos 233 138 197 187 196 188 230 216 203 165 146 217 212 214 192 24

Temperature °C 23.2 1.9 14.4 5.0 8.0 6.8 11.7 14.7 18.2 22.5 22.7 21.0 18.9 15.6 8.0 6.4

Legend Notes:

MCL: Maximum Contaminant Level Sec.Std: Secondary Standard NTU: Nephelometric Turbidity Unit mg/L: Milligram Per Liter (ppm) AL: Action Level RL: Reporting Limit < : Less than AE: Analytical Error IN: Invalid Sample (1) Turbidity must not exceed 0.3 NTU in 95% of daily samples in any month (2) EPA Guidance Level (3) As Calcium Carbonate (4) By Titration (5) Tap Water Hardness in Grains per Gallon multiply value by 0.058 (Grains/Gallon)/(mg/L) --> (6) Reported results are below the low calibration standard but above the instrument detection limit. NA = Not available ND = Not detected above the reporting limit Maximum Minimum Average

6.6 4.3 5.8 GPG

Modified: 01/13/2025, 17:27