Waialua-Haleiwa is a large public water system in EPA region 9 that provides tap water for the 96712 zip codes. It has 9 facilities where the water supply was tested for 75 chemical contaminants that impact tap water quality and human health.
The maximum reported level of HAA5 (five regulated haloacetic acids) was 0.31 µg/L. There were 1 contamintants found in the Waialua-Haleiwa water supply at levels that were above the minimum reporting level.
The latest water samples were taken on February 12th, 2025.