Nitrate (as N) in Nampa water
5 systems serving Nampa detected Nitrate (as N) in the last 36 months. 2 are elevated. The federal MCL is 10.00ppm.
| System | 36 mo max | Latest | Status | Last sample |
|---|---|---|---|---|
| Valley View Water | 7.34ppm | 6.78ppm | Elevated | 2026-07-24 |
| City of Nampa | 6.30ppm | 6.00ppm | Elevated | 2026-08-19 |
| Westview Shervik Subdivision | 3.40ppm | 3.40ppm | Detected | 2026-02-23 |
| City of Caldwell | 2.30ppm | 0.30ppm | Detected | 2026-04-15 |
| Dahl Subdivision | 1.60ppm | 1.60ppm | Detected | 2025-12-11 |
Infants below the age of six months who drink water containing nitrate in excess of the MCL could become seriously ill and, if untreated, may die. Symptoms include shortness of breath and blue-baby syndrome.EPA, quoted. This site does not paraphrase health guidance; for infants and pregnancy, read the agency text as written.
Nitrate (as N) 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.