Gibson County, TN
drinking water quality
51,422 residents · 15 public water systems · 9 ZIP codes
EPA sampled 4 of 15 public water systems here, together serving about 29,381 people. The highest reading was PFOS at 27 ng/L at Trenton Water System. 1 of the sampled system was above a federal limit. Last sampled 9/26/2023.
What was found
| Compound | Highest result | Federal limit | Ratio |
|---|---|---|---|
| PFOS | 27 ng/L | 4 ng/L | 6.8× |
| PFHxS | 9.3 ng/L | 10 ng/L | 0.9× |
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 Gibson County
38233 · 38316 · 38330 · 38338 · 38343 · 38358 · 38369 · 38382 · 38389
Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.