The Power of Information

National Drinking Water Database

Hydrogen sulfide in California

Hydrogen sulfide is a constituent of crude petroleum and natural gas; it is also released from decomposing waste in landfills and sewers and from food processing factories, coke ovens, paper mills, tanneries, and petroleum refineries.

The Most Polluted Communities in California

2 water utilities reported detecting Hydrogen sulfide in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Hydrogen sulfide level

RankSystem Population Served Positive test results of total reported tests Average Level
1Long Beach Water Department
Long Beach, CA
452,9058 of 9157.68 ppb
(0 to 320 ppb)
2City of Seal Beach
Seal Beach, CA
25,0981 of 139.67 ppb
(39.67 ppb)

Health Based Limits for Hydrogen sulfide

There are no health based standards that EWG is using for this chemical

Violation Summary for Hydrogen sulfide in California

There are no violations reported for this contaminant in California