2026 water quality report · 2025 reporting year
Public water system GA0630000. Use these measurements only for this system; they do not describe private wells or every address in Clayton County.
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
34mg/L as CaCO₃
MyTapWater estimates 2.0 gpg for Clayton County from USGS data. This is regional context, not measured hardness for this utility or your tap.
USGS: soft ≤60; moderately hard 61–120 mg/L as CaCO₃.
0.97mg/L
Reported amount; range 0.01–1.99.
MRDL in the utility report: 4 mg/L.
0.71mg/L
Reported amount; range 0.00–1.26.
MCL in the utility report: 4 mg/L.
69.8µg/L
Reported rolling-average value; individual samples 22.1–83.8.
MCL in the utility report: 80 µg/L.
47.3µg/L
Reported rolling-average value; samples 16.2–60.0.
MCL in the utility report: 60 µg/L.
0.74mg/L
Reported amount; range 0.00–0.74.
MCL in the utility report: 10 mg/L.
0samples over action level
The tap table shows zero samples above the report’s lead action level.
The report uses 15 µg/L for its system assessment. A tap with lead plumbing needs its own test.
0.407NTU
Highest value of the year.
99.99% of samples were below 0.3 NTU.
Continue with your home details for general filtration guidance. We will not use another utility’s numbers as your result.
Find My Water System →A city report cannot establish a well’s water quality. Well-water treatment depends on your test results and site conditions.
Explore well-water systems →The figures below are provider-specific. They are not a countywide average.
| Utility | Hardness | Hardness source |
|---|---|---|
| 34 mg/L as CaCO₃ · Soft regional estimate | Regional estimate · sample year not identified |
Selected results with the original sampling dates and measurement basis. Open the utility report for every parameter, notice and footnote.
Open the complete utility report ↗
| What was measured | Reported amount | Sample year / source date | How to read it |
|---|---|---|---|
| Hardness | 34 mg/L as CaCO₃MyTapWater estimates 2.0 gpg for Clayton County from USGS data. This is regional context, not measured hardness for this utility or your tap. | Regional estimate · sample year not identifiedView source ↗ | Soft regional estimate |
| Chlorine | 0.97 mg/LReported amount; range 0.01–1.99. | 2025View source ↗ | Below 4 mg/L disinfectant limitMRDL in the utility report: 4 mg/L. |
| Fluoride | 0.71 mg/LReported amount; range 0.00–1.26. | 2025View source ↗ | Below 4 mg/L limitMCL in the utility report: 4 mg/L. |
| Total trihalomethanes (TTHM) | 69.8 µg/LReported rolling-average value; individual samples 22.1–83.8. | 2025View source ↗ | Below 80 µg/L limitMCL in the utility report: 80 µg/L. |
| Haloacetic acids (HAA5) | 47.3 µg/LReported rolling-average value; samples 16.2–60.0. | 2025View source ↗ | Below 60 µg/L limitMCL in the utility report: 60 µg/L. |
| Nitrate | 0.74 mg/LReported amount; range 0.00–0.74. | 2025View source ↗ | Below 10 mg/L limitMCL in the utility report: 10 mg/L. |
| Lead | 0 samples over action levelThe tap table shows zero samples above the report’s lead action level. | 2026 report · tap-sampling tableView source ↗ | No sampled sites over levelThe report uses 15 µg/L for its system assessment. A tap with lead plumbing needs its own test. |
| Turbidity | 0.407 NTUHighest value of the year. | 2025View source ↗ | Treatment target met99.99% of samples were below 0.3 NTU. |
| Chlorite | 0.41 mg/LReported amount; range 0.13–0.81. | 2025View source ↗ | Below 1 mg/L limitMCL in the utility report: 1 mg/L. |
| Chlorine dioxide | 0.12 mg/LReported residual; range 0.00–0.69. | 2025View source ↗ | Below 0.8 mg/L disinfectant limitMRDL in the utility report: 0.8 mg/L. |
In drinking water, ppm ≈ mg/L, ppb ≈ µg/L and ppt ≈ ng/L. Calculated hardness in grains per US gallon (gpg) = mg/L as CaCO₃ ÷ 17.118, rounded to one decimal. ND means below the reporting limit, not zero.
MCL means a regulatory contaminant limit; MRDL is a disinfectant limit. Lead and copper use tap-sampling action levels. TTHM and HAA5 compliance is assessed using running averages at specific locations, not the highest single sample.
PFAS results depend on the compound, sample location, year and reporting limit. A missing result or nondetect is not proof of zero PFAS. EPA PFAS benchmarks and implementation ↗
Choose the system size, keep useful existing equipment, and review your filtration goals.
Source water. CCWA collects surface water in five reservoirs. Smith, Hooper and Hicks are the authority’s three drinking-water production facilities.
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More about your local water
Clayton’s chlorine result was 0.97 mg/L in its 2025 data.
Clayton County Water Authority treats surface water at three facilities. Its annual report is a system summary; hardness shown here is a separately labeled regional estimate.
A useful local question
No. The authority distinguishes the 69.8 µg/L result from the range of 22.1–83.8 µg/L. Comparing the highest individual sample directly with the annual-average limit can misstate compliance.
Results retain the utility, sample year, units and comparison used in the source. Hardness is shown separately as a utility measurement, utility guidance or regional estimate. USGS categories describe mineral content, not drinking-water safety.
Use the published report for your own retail water system. These sources can help identify the right report; a county or ZIP alone cannot confirm service.
Sources reviewed November 5, 2026.
Your water → your home → your system
Choose the system size, keep useful existing equipment, and review your filtration goals.