Total Trihalomethanes in Nampa water
2 systems serving Nampa detected Total Trihalomethanes in the last 36 months. The federal MCL is 80.0ppb.
| System | 36 mo max | Latest | Status | Last sample |
|---|---|---|---|---|
| City of Nampa | 11.0ppb | 4.6ppb | Detected | 2026-05-13 |
| City of Caldwell | 0.6ppb | ND | Detected | 2026-07-14 |
Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous systems, and may have an increased risk of getting cancer.EPA, quoted. This site does not paraphrase health guidance.
Total Trihalomethanes in Treasure Valley drinking water. Nampa water quality.
Numbers are the system's samples at its taps and wells, not yours. Lead and copper are 90th percentiles from sampled homes. Well pages are nearby-sample estimates. Health text restates EPA and DEQ. Methodology.