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Tap water quality report

Zanesville, OH

EPA monitoring detected 20 contaminants across the 3 water suppliers serving Zanesville. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

3
water suppliers
32,661
people served
20
contaminants found
Ohio rankings Lead in Ohio PFAS in Ohio

What was found in Zanesville's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
900 µg/L 9%
of the EPA limit 10000 µg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
Highest in the city: 1500 µg/L — SOUTH ZANESVILLE PWS · 2,800 people · 2019
2/3 SYR4
Nitrate-Nitrite
840 µg/L 8.4%
of the EPA limit 10000 µg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
Highest in the city: 1487.5 µg/L — SOUTH ZANESVILLE PWS · 2,800 people · 2019
2/3 SYR4
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2018
2/3 SYR4
Copper
570.5 µg/L 44%
of the EPA limit 1300 µg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
TTHM
61.41 µg/L 77%
of the EPA limit 80 µg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
Barium
53.77 µg/L 2.7%
of the EPA limit 2000 µg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2018
2/3 SYR4
Lead
42.22 µg/L 281%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
Chloroform
23.83 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
Bromodichloromethane
21.43 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
Total Haloacetic Acids (HAA5)
19.4 µg/L 32%
of the EPA limit 60 µg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
Dibromochloromethane
14.04 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
Dichloroacetic Acid
9.86 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
Trichloroacetic Acid
6.745 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
3/3 SYR4
Dibromoacetic Acid
3.93 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
Highest in the city: 4.755 µg/L — SOUTH ZANESVILLE PWS · 2,800 people · 2019
3/3 SYR4
Bromoform
2.51 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
Highest in the city: 3.75 µg/L — SOUTH ZANESVILLE PWS · 2,800 people · 2019
3/3 SYR4
Monochloroacetic Acid
2 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
1/3 SYR4
Monobromoacetic Acid
1.27 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2019
1/3 SYR4
6:2 Fts
0.0201 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2023
1/3 UCMR-5
PFBS
0.0031 µg/L
No EPA limit set
Main supplier: ZANESVILLE PWS · 29,381 people · 2023
1/3 UCMR-5
Lead
0.00090 mg/L 6%
of the EPA limit 0.0150 mg/L
Main supplier: ZANESVILLE PWS · 29,381 people · 2025
3/3 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Zanesville

SupplierPopulation served
ZANESVILLE PWS 29,381
SOUTH ZANESVILLE PWS 2,800
GREENLAWN ESTATES MHP 480

Frequently asked questions about Zanesville tap water

Is Zanesville tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Zanesville. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Zanesville?

3 public water suppliers report drinking-water monitoring for Zanesville, Ohio to the EPA. Each is listed above with its population served.

What contaminants are in Zanesville's water?

The contaminants EPA monitoring detected in Zanesville include Nitrate, Nitrate-Nitrite, Fluoride, Copper, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.