2024 Southwest Regulated Detected Contaminants Table
| 2024 Inorganic Chemicals - Annual Monitoring at Plant Finished Tap |
| Regulated Contaminant | Test Date | Unit | Health Goal MCLG | Allowed Level MCL | Highest Level Detected | Range of Detection | Violation | Major Sources in Drinking Water |
|---|
| Fluoride | 02-13-2024 | ppm | 4 | 4 | 0.66 | n/a | no | Erosion of natural deposit; Water additive, which promotes strong teeth; Discharge from fertilizer and aluminum factories. |
| Nitrate | 02-13-2024 | ppm | 10 | 10 | 0.31 | n/a | no | Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits. |
2024 Disinfection Residual - Monitoring in the Distribution System
| Regulated Contaminant | Test Date | Unit | Health Goal MRDLG | Allowed Level MRDL | Highest Level RAA | Range of Quarterly Results | Violation | Major Sources in Drinking Water |
|---|
| Total Chlorine Residual | 2024 | ppm | 4 | 4 | 0.70 | 0.52-0.80 | no | Water additive used to control microbes |
| 2024 Turbidity - Monitored Every 4 Hours at the Plant Finished Water Tap |
| Highest Single Measurement Cannot Exceed 1 NTU | Lowest Monthly % of Samples Meeting Turbidity Limit of 0.3 NTU (minimum 95%) | Violation | Major Sources in Drinking Water |
|---|
| 0.1 NTU | 100% | no | Soil Runoff |
| Turbidity is a measure of the cloudiness of the water. We monitor it because it is a good indicator of the effectiveness of our filtration system |
| 2024 Special Monitoring |
| Contaminant | Test Date | Unit | MCLG | MCL | Highest Level Detected | Source of Contaminant |
|---|
| Sodium | 02-13-2024 | ppm | n/a | n/a | 5.2 | Erosion of natural deposits |
| Regulated Contaminant | Treatment Technique | Typical Source of Contaminant |
|---|
| Total Organic Carbon ppm | The Total Organic Carbon (TOC) removal ratio is calculated as the ratio between the actual TOC removal and the TOC removal requirements. The TOC is measured each quarter and because the level is low, there is no requirement for TOC removal. | Erosion of natural deposits |
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.
| Unregulated Contaminant | Average Level Detected | Range | Year Sampled | Comments |
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| [Name of Unregulated Contaminant] (unit) | | | | |
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| [Name of Unregulated Contaminant] (unit) | | | | |
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