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EWG's Tap Water Database — 2019 UPDATE

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Hydrogen sulfide

City of Portsmouth

Hydrogen sulfide is a constituent of crude petroleum and natural gas; it is also released from decomposing waste in landfills and sewers, and from industrial facilities. Hydrogen sulfide has a rotten egg odor. It can irritate the eyes and respiratory system.

 

1

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
201430.0 ppb1130.0 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

All test results

Date Lab ID Result
2014-04-0314-0524130.0 ppb