Petition: Achieve the Hydrogen Sulfide Standard!

Waking up in the middle of the night to “rotten egg odors” is not an uncommon event in Allegheny County, especially in and downwind of the Mon Valley. The rotten egg smell is characteristic of malodorous hydrogen sulfide (H2S) and is perceptible by most people at a very low concentration.

An app for easily reporting smells was recently developed (Smell PGH) by the CREATE Lab at Carnegie Mellon University The Smell PGH app has recorded 471 specific “rotten egg” odor complaints between September 29, 2016 and October 11, 2017.

The H2S odor is so unpleasant and common that Allegheny County has required an ambient limit of .005 parts per million (ppm) averaged over 24 hours. Unfortunately the standard has been repeatedly violated at the air pollution monitor in Liberty (in the Mon Valley).

YearViolations of .005 ppm standard
2017 through 9/535
201641
201587
201449
201328
201265

To improve the quality of life for all Allegheny County residents, the undersigned county residents urge the Allegheny County Health Department to achieve attainment of the H2S standard, a legal requirement, now!

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