Gallia County, OH
drinking water quality
28,886 residents · 3 public water systems · 7 ZIP codes
EPA sampled 2 of 3 public water systems here, together serving about 28,129 people. The highest reading was PFOA at 7.5 ng/L at Gallia Co Rural Water Association. 2 of the sampled systems were above a federal limit. Last sampled 9/26/2024.
What was found
| Compound | Highest result | Federal limit | Ratio |
|---|---|---|---|
| PFOA | 7.5 ng/L | 4 ng/L | 1.9× |
Also detected, with no federal limit set: lithium (9650 ng/L).
What this means
PFAS are industrial chemicals that EPA describes as breaking down only very slowly in the environment. In April 2024 EPA set the first enforceable national limits: 4 ng/L for PFOA and PFOS, 10 ng/L for PFHxS, PFNA and GenX.
These figures are county-level and come from EPA’s sampling of public water systems. They describe the worst result found in the county, not what comes out of any particular tap — that depends on which system serves the address, and on the plumbing in the building. A private well is not covered by this programme at all.
ZIP codes in Gallia County
45614 · 45620 · 45623 · 45631 · 45658 · 45674 · 45686
Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.