Hamilton County, TN
drinking water quality
386,256 residents · 11 public water systems · 27 ZIP codes
EPA sampled 8 of 11 public water systems here, together serving about 409,735 people. The highest reading was PFOA at 35 ng/L at Savannah Valley U.d.. 1 of the sampled system was above a federal limit. Last sampled 9/9/2024.
What was found
| Compound | Highest result | Federal limit | Ratio |
|---|---|---|---|
| PFOA | 35 ng/L | 4 ng/L | 8.8× |
| PFOS | 18 ng/L | 4 ng/L | 4.5× |
| PFHxS | 4.7 ng/L | 10 ng/L | 0.5× |
Also detected, with no federal limit set: PFBS (49 ng/L), PFPeA (30 ng/L), PFHxA (28 ng/L), PFHpA (14 ng/L), PFBA (13 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 Hamilton County
30741 · 37302 · 37308 · 37315 · 37336 · 37341 · 37343 · 37350 · 37351 · 37363 · 37373 · 37377 · 37379 · 37402 · 37403 · 37404 · 37406 · 37407 · 37408 · 37409 · 37410 · 37411 · 37412 · 37415 · 37416 · 37421 · 37450
Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.