Tap and WellTreasure Valley water, from the public record

Haloacetic Acids (HAA5) in Nampa water

1 system serving Nampa detected Haloacetic Acids (HAA5) in the last 36 months. The federal MCL is 60.0ppb.

System36 mo maxLatestStatusLast sample
City of Nampa2.6ppb1.6ppbDetected2026-05-13
Some people who drink water containing haloacetic acids in excess of the MCL over many years may have an increased risk of getting cancer.EPA, quoted. This site does not paraphrase health guidance.

Haloacetic Acids (HAA5) 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.