City of Sunnyvale is a large public water system in EPA region 09 that provides tap water for the 94085 - 94087 zip codes. It has 16 facilities where the water supply was tested for 23 chemical contaminants that impact tap water quality and human health.
The maximum reported level of 1-butanol was 2.3 µg/L. The maximum reported level of HAA5 (five regulated haloacetic acids) was 30 µg/L. The maximum reported level of alpha-hexachlorocyclohexane was 0.016 µg/L. The only recent water sample showed levels of alpha-hexachlorocyclohexane that were at or above unsafe concentration levels. The maximum reported level of Manganese was 4.8 µg/L. There were 4 contamintants found in the City of Sunnyvale water supply at levels that were above the minimum reporting level. 1 of the contaminants were above the reference level, which means they may pose a risk to human health.