Tap Water Quality Report
Tap water quality in HAMILTON, Ohio
Tap water in HAMILTON, Ohio receives a grade of C (71/100) from TapWaterSafety.org. It's served by BUTLER CO. WATER DISTRICT 2 PWS. The most significant water quality concerns are: Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in HAMILTON's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving HAMILTON.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.94 ppt, 940x above the EWG health guideline of 0.001 ppt.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 31.1 ppb, 207x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 8.23 ppb, 137x above the EWG health guideline of 0.06 ppb.
EPA compliance record
Official U.S. EPA records for BUTLER CO. WATER DISTRICT 2 PWS (system ID OH0900303) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Public Notice Rule and Revised PN Rule | Other (e.g. public notice) | 08/14/2024 | Open |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 04/01/2023 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for HAMILTON
Filters matched to the specific contaminants in HAMILTON's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts like TTHM. Look for NSF/ANSI 53 VOC or chloroform reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in HAMILTON's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.94 ppt | 0.001 | 10.0 | — | — | — | — | 940× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
31.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 207× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
8.23 ppb | 0.06 | — | — | — | — | — | 137× over |
| Bromodichloromethane Disinfection byproduct |
8.03 ppb | 0.06 | — | — | — | — | — | 134× over |
| Bromochloroacetic acid Disinfection byproduct |
2.36 ppb | 0.02 | — | — | — | — | — | 118× over |
| Dibromoacetic acid Disinfection byproduct |
3.23 ppb | 0.03 | — | — | — | — | — | 108× over |
| Dibromochloromethane Disinfection byproduct |
10.6 ppb | 0.1 | — | — | — | — | — | 106× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
5.61 ppb | 0.1 | 60.0 | 60 | — | — | — | 56× over |
| Chloroform Disinfection byproduct |
6.07 ppb | 0.4 | — | — | — | — | — | 15× over |
| Bromoform Disinfection byproduct |
6.46 ppb | 0.5 | — | — | — | — | — | 13× over |
| Dichloroacetic acid Disinfection byproduct |
2.11 ppb | 0.2 | — | — | — | — | — | 11× over |
| Chromium (hexavalent) Heavy metal |
0.203 ppb | 0.02 | — | — | — | — | — | 10× over |
| Trichloroacetic acid Disinfection byproduct |
0.45 ppb | 0.1 | — | — | — | — | — | 4.5× over |
| 1,4-Dioxane Semi-volatile organic compound |
0.222 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Chlorate Disinfection byproduct |
77.0 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
2.1 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.39 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.8 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
1.3 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.152 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.0417 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from BUTLER CO. WATER DISTRICT 2 PWS.