Johnson County, KY
drinking water quality

22,098 residents · 1 public water system · 17 ZIP codes

Worst PFAS result on federal record
No PFAS above the federal limit

EPA sampled 1 of 1 public water system here, together serving about 24,354 people. Last sampled 8/21/2024.

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.

Request a test of your own supply.

This is Johnson County's worst federal result, not a reading from your tap. Leave a number and a local water specialist will test it.

No obligation. Your details go to a local water specialist to arrange the test, and to no one else.

ZIP codes in Johnson County

41204 · 41219 · 41222 · 41226 · 41234 · 41238 · 41240 · 41254 · 41255 · 41256 · 41257 · 41260 · 41263 · 41265 · 41268 · 41271 · 41274

Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.

Other Kentucky counties

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