Arsenic in Caldwell water
2 systems serving Caldwell detected Arsenic in the last 36 months. 2 are elevated. The federal MCL is 10.0ppb.
| System | 36 mo max | Latest | Status | Last sample |
|---|---|---|---|---|
| City of Caldwell | 7.5ppb | 7.5ppb | Elevated | 2025-08-20 |
| Caldwell Housing Authority | 6.3ppb | 6.3ppb | Elevated | 2025-06-16 |
Some people who drink water containing arsenic in excess of the MCL over many years could experience skin damage or problems with their circulatory system, and may have an increased risk of getting cancer.EPA, quoted. This site does not paraphrase health guidance.
Arsenic in Treasure Valley drinking water. Caldwell 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.