Is Gahanna, OH tap water safe?
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data for Gahanna City Public Water System.
Gahanna City Public Water System supplies Gahanna (33,258 people).
Water system
Gahanna City Public Water System
33,258 people · Purchased surface water · EPA ID OH2501303
Buys treated water from Columbus Public Water System.
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Not detected | – | 4 ppt |
| PFOS Not detected | – | 4 ppt |
| PFHxS Not detected | – | 10 ppt |
| PFNA Not detected | – | 10 ppt |
| HFPO-DA (GenX) Not detected | – | 10 ppt |
ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.
Lead: 0.5 ppb at the 90th percentile (Dec 2024, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0
Across Ohio, 35 of 331 water systems EPA tested had PFAS above a 2024 federal limit, and 3 systems were above the lead action level in results from the last five years. Ohio results.
Gahanna homes and lead pipes
Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. How to check your own line.
Housing: Census American Community Survey 2020–2024 5-year estimates for Gahanna city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Westerville 6 mi Del-Co Water Company, Inc. | None above limits | 0.82 ppb |
| Columbus 7 mi Columbus Public Water System | None above limits | 1.2 ppb |
| Reynoldsburg 7 mi Reynoldsburg City Public Water System | None above limits | 2.1 ppb |
| Pickerington 12 mi Pickerington City Public Water System | None above limits | 0.6 ppb |
| Dublin 15 mi Del-Co Water Company, Inc. | None above limits | 0.82 ppb |
| Grove City 15 mi Columbus Public Water System | None above limits | 1.2 ppb |
Gahanna ZIP codes (1)
- 43230
Questions
Is Gahanna tap water safe to drink?
Gahanna City Public Water System has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.
Who supplies water in Gahanna, OH?
Gahanna City Public Water System, which serves 33,258 people.
Does Gahanna tap water have PFAS?
None detected above EPA's reporting limits. Gahanna City Public Water System had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.
Do Gahanna homes have lead pipes?
Census estimates put 42% of Gahanna homes as built before 1980 (Ohio: 63%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Gahanna City Public Water System's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.