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Chillicothe, OH

EPA monitoring detected 20 contaminants across the 2 water suppliers serving Chillicothe. 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.

2
water suppliers
57,070
people served
20
contaminants found
Ohio rankings Lead in Ohio PFAS in Ohio

What was found in Chillicothe'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
1785 µg/L 18%
of the EPA limit 10000 µg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
2/2 SYR4
Nitrate-Nitrite
1515 µg/L 15%
of the EPA limit 10000 µg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
2/2 SYR4
Fluoride
1077.5 µg/L 27%
of the EPA limit 4000 µg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 1165.5 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
Copper
898.5 µg/L 69%
of the EPA limit 1300 µg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
2/2 SYR4
Barium
47.4 µg/L 2.4%
of the EPA limit 2000 µg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 122.9 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
TTHM
35.765 µg/L 45%
of the EPA limit 80 µg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 48.41 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
Chloroform
13.24 µg/L
No EPA limit set
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 20.17 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
Bromodichloromethane
12.73 µg/L
No EPA limit set
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 14.185 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
12.525 µg/L 21%
of the EPA limit 60 µg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
2/2 SYR4
Lead
5.6 µg/L 37%
of the EPA limit 15 µg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 11.85 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
Dibromochloromethane
8.515 µg/L
No EPA limit set
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 10.955 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
Dichloroacetic Acid
6.105 µg/L
No EPA limit set
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
2/2 SYR4
Arsenic
4 µg/L 40%
of the EPA limit 10 µg/L
Highest in the city: CHILLICOTHE CITY PWS · 21,725 people · 2019
1/2 SYR4
Dibromoacetic Acid
2.59 µg/L
No EPA limit set
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 3.6 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
Bromoform
1.6 µg/L
No EPA limit set
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
Highest in the city: 3.57 µg/L — CHILLICOTHE CITY PWS · 21,725 people · 2019
2/2 SYR4
Trichloroacetic Acid
3 µg/L
No EPA limit set
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2019
2/2 SYR4
Monochloroacetic Acid
2.59 µg/L
No EPA limit set
Highest in the city: CHILLICOTHE CITY PWS · 21,725 people · 2019
1/2 SYR4
Pfpea
0.0031 µg/L
No EPA limit set
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2025
1/2 UCMR-5
PFBS
0.0030 µg/L
No EPA limit set
Highest in the city: CHILLICOTHE CITY PWS · 21,725 people · 2023
1/2 UCMR-5
Lead
0.0018 mg/L 12%
of the EPA limit 0.0150 mg/L
Main supplier: ROSS COUNTY WATER CO INC · 35,345 people · 2025
2/2 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 Chillicothe

SupplierPopulation served
ROSS COUNTY WATER CO INC 35,345
CHILLICOTHE CITY PWS 21,725

Frequently asked questions about Chillicothe tap water

Is Chillicothe tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Chillicothe. 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 Chillicothe?

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

What contaminants are in Chillicothe's water?

The contaminants EPA monitoring detected in Chillicothe include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.