2026 water quality report · 2025 reporting year
Public water system GA1170050. Use these measurements only for this system; they do not describe private wells or every address in Forsyth County.
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
12mg/L as CaCO₃
MyTapWater estimates 0.7 gpg for Forsyth 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.
1.91mg/L
Average; range 1.32–2.37.
MRDL in the utility report: 4 mg/L.
0.71mg/L
Average; range 0.27–1.1.
MCL in the utility report: 4 mg/L.
31.98µg/L
Average in the county table; sample range 1.9–69.95.
MCL in the utility report: 80 µg/L.
26.35µg/L
Average in the county table; sample range 4.6–43.0.
MCL in the utility report: 60 µg/L.
0.35mg/L
Average; reported range 0.35–0.35.
MCL in the utility report: 10 mg/L.
1µg/L
90th percentile; tap samples ranged from 0 to 49.
AL in the utility report: 15 µg/L.
99% at or below 0.3 NTU
Turbidity range 0.07–0.70 NTU.
The report’s treatment-technique criterion is ≥95% at or 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 |
|---|---|---|
| 12 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 | 12 mg/L as CaCO₃MyTapWater estimates 0.7 gpg for Forsyth 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 |
| Free chlorine | 1.91 mg/LAverage; range 1.32–2.37. | 2025View source ↗ | Below 4 mg/L disinfectant limitMRDL in the utility report: 4 mg/L. |
| Fluoride | 0.71 mg/LAverage; range 0.27–1.1. | 2025View source ↗ | Below 4 mg/L limitMCL in the utility report: 4 mg/L. |
| Total trihalomethanes (TTHM) | 31.98 µg/LAverage in the county table; sample range 1.9–69.95. | 2025View source ↗ | Below 80 µg/L limitMCL in the utility report: 80 µg/L. |
| Haloacetic acids (HAA5) | 26.35 µg/LAverage in the county table; sample range 4.6–43.0. | 2025View source ↗ | Below 60 µg/L limitMCL in the utility report: 60 µg/L. |
| Nitrate/nitrite | 0.35 mg/LAverage; reported range 0.35–0.35. | 2025View source ↗ | Below 10 mg/L limitMCL in the utility report: 10 mg/L. |
| Lead | 1 µg/L90th percentile; tap samples ranged from 0 to 49. | 2024View source ↗ | Below 15 µg/L action levelAL in the utility report: 15 µg/L. |
| Turbidity | 99 % at or below 0.3 NTUTurbidity range 0.07–0.70 NTU. | 2025View source ↗ | Above 95% minimumThe report’s treatment-technique criterion is ≥95% at or below 0.3 NTU. |
| Copper | 0.15 mg/L90th percentile; sample range 0.0037–0.35. | 2024View source ↗ | Below 1.3 mg/L action levelAL in the utility report: 1.3 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. Most of the county system’s supply originates in Lake Lanier and is treated by Forsyth County or Cumming. Smaller supplies can come from Fulton County or local wells.
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More about your local water
Most county water starts in Lake Lanier; the source mix can vary.
Cumming can treat water supplied to county customers, but a customer billed by Cumming Utilities has a separate utility report. The county also describes smaller Fulton and groundwater supplies.
A useful local question
Start with the retail water provider shown on your bill. A wholesale or treatment relationship does not make two retail systems’ distribution and tap-sampling results interchangeable.
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.