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Tap water quality report

Hamilton, OH

EPA monitoring detected 23 contaminants across the 4 water suppliers serving Hamilton. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

4
water suppliers
204,582
people served
23
contaminants found
Ohio rankings Lead in Ohio PFAS in Ohio

What was found in Hamilton's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
4050 µg/L 41%
of the EPA limit 10000 µg/L
 3/4 SYR4
Nitrate-Nitrite
4050 µg/L 41%
of the EPA limit 10000 µg/L
 3/4 SYR4
Copper
1680 µg/L 129%
of the EPA limit, in the worst sample — 1300 µg/L
 4/4 SYR4
Fluoride
1030 µg/L 26%
of the EPA limit 4000 µg/L
 2/4 SYR4
TTHM
53.26 µg/L 67%
of the EPA limit 80 µg/L
 3/4 SYR4
Lead
52.7 µg/L 351%
of the EPA limit, in the worst sample — 15 µg/L
 4/4 SYR4
Barium
40 µg/L 2%
of the EPA limit 2000 µg/L
 2/4 SYR4
Dibromochloromethane
21.89 µg/L
No EPA limit set
 4/4 SYR4
Bromoform
17.88 µg/L
No EPA limit set
 3/4 SYR4
Bromodichloromethane
14.78 µg/L
No EPA limit set
 3/4 SYR4
Total Haloacetic Acids (HAA5)
14.36 µg/L 24%
of the EPA limit 60 µg/L
 3/4 SYR4
Chloroform
10.27 µg/L
No EPA limit set
 3/4 SYR4
Dibromoacetic Acid
9.827 µg/L
No EPA limit set
 3/4 SYR4
Trichloroacetic Acid
6.092 µg/L
No EPA limit set
 3/4 SYR4
Dichloroacetic Acid
5.185 µg/L
No EPA limit set
 3/4 SYR4
Monochloroacetic Acid
4.33 µg/L
No EPA limit set
 1/4 SYR4
Lead
0.0058 mg/L 39%
of the EPA limit 0.0150 mg/L
 4/4 LCR
Hfpo-Da
0.0057 µg/L
No EPA limit set
 1/4 UCMR-5
Pfba
0.0057 µg/L
No EPA limit set
 1/4 UCMR-5
PFHXS
0.0047 µg/L
No EPA limit set
 1/4 UCMR-5
Pfpea
0.0043 µg/L
No EPA limit set
 1/4 UCMR-5
PFBS
0.0035 µg/L
No EPA limit set
 2/4 UCMR-5
Pfhxa
0.0030 µg/L
No EPA limit set
 1/4 UCMR-5
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 single worst sample on record — 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 Hamilton

SupplierPopulation served
BUTLER CO. WATER DISTRICT 2 PWS 116,572
FAIRFIELD CITY PWS 44,907
SOUTHWEST REGIONAL WATER DISTRICT 42,856
CROUSE MOBILE HOME PARK & SALES, LLC 247

Frequently asked questions about Hamilton tap water

Is Hamilton tap water safe to drink?

EPA testing detected 23 contaminants in the water serving Hamilton. 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 Hamilton?

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

What contaminants are in Hamilton's water?

The contaminants EPA monitoring detected in Hamilton include Nitrate, Nitrate-Nitrite, Copper, Fluoride, TTHM. The full list, with the highest level found 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.