Public water system record
Gahanna City PWS
Serves Gahanna, Franklin County, OH · 33,258 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Gahanna City PWS in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Gahanna City PWS buys its water from Columbus Public Water System.
- Record on file since 1992, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 3,190 unknown out of 13,272 service lines.
Check whether Gahanna City PWS serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
Full record since 1992
EPA's records for Gahanna City PWS go back to 1992. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 8 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 4 |
| 2000s | 0 | 4 |
| 2010 to October 18, 2016 | 3 | 0 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2013, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Apr 1, 2013 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jan 1, 2013 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0845 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2012 | Resolved |
Where the water comes from
Gahanna City PWS buys its water from Columbus Public Water System. It lists no wells or intakes of its own.
Buys water from
- Columbus Public Water System Columbus, OH
Annual water quality report
Gahanna City PWS must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Ohio.
Certified drinking water labs by state EPA guidance for private wells