Shelby County, KY
drinking water quality
50,124 residents · 4 public water systems · 5 ZIP codes
EPA sampled 4 of 4 public water systems here, together serving about 53,306 people. The highest reading was PFOA at 4.6 ng/L at West Shelby Water District. 2 of the sampled systems were above a federal limit. Last sampled 9/8/2025.
What was found
| Compound | Highest result | Federal limit | Ratio |
|---|---|---|---|
| PFOA | 4.6 ng/L | 4 ng/L | 1.1× |
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 Shelby County
40003 · 40022 · 40065 · 40067 · 40076
Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.