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Clarke County water quality report

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Athens-Clarke County Public Utilities

2025 water quality results

Routine results are from 2025, while the listed residential lead sampling took place in 2024. The disinfection by-product values are system-wide running averages.

Your water at a glance

See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.

Hardness

Measurement needed

Not reported

The reviewed utility report does not give a hardness measurement. Test incoming water to size a softener.

Reviewed report; no hardness valueView source

Chlorine

Below 4 mg/L disinfectant limit

0.89mg/L

Average; highest reported value 1.90.

2025View source

Fluoride

Below 4 mg/L limit

0.78mg/L

Average; maximum 1.42 and range 0.41–1.42.

2025View source

Total trihalomethanes (TTHM)

Utility reports standard met

46.62µg/L

System-wide running annual average, as labeled by the utility; sample range 0–76.02.

The report lists an 80 µg/L limit. Compliance uses running annual averages, not a single sample.

2025View source

Haloacetic acids (HAA5)

Utility reports standard met

35.70µg/L

System-wide running annual average; sample range 0–58.50.

The report lists a 60 µg/L limit; use the stated reporting basis.

2025View source

Nitrate

Below 10 mg/L limit

0.37mg/L

Reported result as nitrogen.

2025View source

Lead

90th-percentile tap result

3.50µg/L

90th percentile; two samples exceeded the report’s 15 µg/L action level.

This is a sample-set statistic, not a measurement at your home.

2024View source

Water hardness by provider

The figures below are provider-specific. They are not a countywide average.

UtilityHardnessHardness source
Not published in the reviewed reportNo numeric hardness result in the reviewed report
View Full Water ReportOpen the measured results, dates, comparisons and original utility report.

The numbers behind your report

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 measuredReported amountSample year / source dateHow to read it
HardnessNot reported The reviewed utility report does not give a hardness measurement. Test incoming water to size a softener.Reviewed report; no hardness valueView source ↗Measurement needed
Chlorine0.89 mg/LAverage; highest reported value 1.90.2025View source ↗Below 4 mg/L disinfectant limit
Fluoride0.78 mg/LAverage; maximum 1.42 and range 0.41–1.42.2025View source ↗Below 4 mg/L limit
Total trihalomethanes (TTHM)46.62 µg/LSystem-wide running annual average, as labeled by the utility; sample range 0–76.02.2025View source ↗Utility reports standard metThe report lists an 80 µg/L limit. Compliance uses running annual averages, not a single sample.
Haloacetic acids (HAA5)35.70 µg/LSystem-wide running annual average; sample range 0–58.50.2025View source ↗Utility reports standard metThe report lists a 60 µg/L limit; use the stated reporting basis.
Nitrate0.37 mg/LReported result as nitrogen.2025View source ↗Below 10 mg/L limit
Lead3.50 µg/L90th percentile; two samples exceeded the report’s 15 µg/L action level.2024View source ↗90th-percentile tap resultThis is a sample-set statistic, not a measurement at your home.

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 ↗

Hardness source ↗USGS hardness classification ↗

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Source water. Athens-Clarke County uses the North Oconee River, Middle Oconee River and Bear Creek Reservoir.

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More about your local water

What this means for your home

Read Athens-Clarke County’s 2025 results, with system-wide averages and 2024 tap sampling distinguished.

Routine results are from 2025, while the listed residential lead sampling took place in 2024. The disinfection by-product values are system-wide running averages.

Filter vs. softener: what each doesPlan installation with your plumber

A useful local question

Are the Athens-Clarke TTHM numbers single samples?

No. The highlighted 46.62 µg/L TTHM value is a system-wide running annual average as labeled in the report. The individual sample range is separate, and the residential lead results shown are from 2024.

Sources and methodology

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.

Different name on your water bill?

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 7, 2026.

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