Bullitt County, KY
drinking water quality
85,802 residents · 2 public water systems · 6 ZIP codes
EPA sampled 1 of 2 public water systems here, together serving about 23,760 people. The highest reading was PFOA at 7.2 ng/L at Mt Washington Water Company. 1 of the sampled system was above a federal limit. Last sampled 8/26/2025.
What was found
| Compound | Highest result | Federal limit | Ratio |
|---|---|---|---|
| PFOA | 7.2 ng/L | 4 ng/L | 1.8× |
Also detected, with no federal limit set: PFPeA (4.1 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 Bullitt County
40047 · 40109 · 40110 · 40150 · 40165 · 40177
Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.