Columbus, Ohio Water Quality Report
Comprehensive analysis of tap water safety based on EPA data
Last updated: January 2026
Is Columbus's Water Safe to Drink?
Generally Safe. Columbus's tap water meets EPA standards for drinking water quality. The water scored 84/100 in our analysis.
EPA Limit Exceeded: 1 contaminant(s) were found above EPA maximum limits: Arsenic.
Contaminants Found in Columbus's Water
2 contaminants tested • Data from EPA SDWIS database
| Contaminant | Level Detected | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
Arsenic | 0.011 mg/L | 0.010 mg/L | 110.0% | Exceeds Limit |
Lead | 0.0012 mg/L | 0.015 mg/L | 8.0% | Safe |
Compliance Violations
Past EPA violations recorded for Columbus's water system
mcl
Arsenic - 6/1/2016
Resolvedmcl
Contaminant 0800 - 6/12/2012
ResolvedAbout Columbus's Water System
COLUMBUS PUBLIC WATER SYSTEM
- PWS ID:
- OH2504412
- Population Served:
- 1,305,946
- Water Source:
- surface
B+84/100
Columbus Water Quality Score
Based on EPA contaminant data and compliance records
95
Contaminants
64
Compliance
85
Infrastructure
Areas of Concern
- Arsenic exceeds EPA limit
- 2 MCL violation(s) on record
Positive Findings
- Good overall water quality
- No violations in the past 3 years
- Low lead levels detected
Protect Your Family's Water
Columbus's water contains Arsenic at 110% of the EPA limit. A quality water filter can reduce this contaminant.
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Other Cities in Ohio
Compare water quality with nearby cities.
View all Ohio cities →Frequently Asked Questions
- Where does Columbus's water come from?
- Columbus primarily uses surface water sources.
- How often is Columbus's water tested?
- Water utilities are required to test for contaminants regularly and report results to the EPA.
- Should I use a water filter in Columbus?
- With 1 contaminants at elevated levels, a water filter can provide extra protection.