Is Hamilton, OH tap water safe?
The short answer
None of the 4 utilities serving Hamilton has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Ohio’s records.
Hamilton Public Water System, which serves the most people here, has 1 result above EPA’s new limit, which takes effect in 2029. The worst: PFOA at 5.3 ppt, above EPA’s new limit, which takes effect in 2029.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Hamilton’s ZIP codes, from EPA’s estimates.
- Open report
Hamilton Public Water System
Ohio · serves 62,447 people · about 15,300 in Hamilton
1 result above EPA’s new limit, which takes effect in 2029. The worst: PFOA at 5.3 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
Butler Co. Water District 2 PWS
Ohio · serves 116,572 people · about 4,100 in Hamilton
1 result above the health goal. The worst: Lead at 3.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Southwest Regional Water District
Ohio · serves 42,856 people · about 2,100 in Hamilton
1 result above the health goal. The worst: Lead at 1.4 ppb, above the health goal.
No health-based violations since 2016
- Open report
New Miami Village PWS
Ohio · serves 3,200 people · about 220 in Hamilton
1 result above the health goal. The worst: Lead at 1.1 ppb, above the health goal.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Hamilton Public Water System’s water, which serves the most people here. Another utility’s report names what handles its own results.
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ZeroWater 10 Cup Pitcher (ZP-010)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53checked Oct. 4, 2026
Certified for: PFOA
Aquasana Claryum Direct Connect (AQ-MF-1)
Under-sink carbon
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
Certified for: PFOA
Express Water StreamLine Direct Connect System (USC001)
Under-sink carbon
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
Certified for: PFOA
Water testing near Hamilton
The 3 labs Ohio certifies closest to Hamilton, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
ALS Environmental - Cincinnati
Cincinnati, OH · about 16 miles
Certified for lead and copper, metals, asbestos
Q Laboratories
Cincinnati, OH · about 21 miles
Certified for bacteria, nitrate
Dayton Central Water Quality Laboratory
Dayton, OH · about 36 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
Which ZIP codes are in Hamilton: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Ohio EPA, laboratories certified/accepted to perform analyses on public drinking water; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Hamilton
Other towns in Butler County with a page of their own.
What to do next
- Read Hamilton Public Water System’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for PFOARanked by certification and what they cost over five years.The best water filters for PFAS, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water