White County, TN
drinking water quality
29,108 residents · 5 public water systems · 3 ZIP codes
EPA sampled 5 of 5 public water systems here, together serving about 39,317 people. The highest reading was PFOS at 4.1 ng/L at Dewhite Utility District. 1 of the sampled system was above a federal limit. Last sampled 9/23/2025.
What was found
| Compound | Highest result | Federal limit | Ratio |
|---|---|---|---|
| PFOS | 4.1 ng/L | 4 ng/L | 1.0× |
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 White County
38579 · 38583 · 38587
Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.