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.
Testing results - average by year
|Year||Average result||Samples taken||Detections||Range of results|
|2014||30.0 ppb||1||1||30.0 ppb|
ppb = parts per billion
All test results