Group Against Smog & Pollution

It was a rough weekend of air quality for Mon Valley, which experienced another days-long bad-air episode &two more air quality exceedances.

The average concentration yesterday was 0.006 ppm, according to preliminary health department data. The state 24-hour standard is 0.005...

This story was updated at 3:28 p.m. April 8 to include information released by the Allegheny County Health Department via the Allegheny...

Editor’s Note: This story was updated at 3:51 p.m. Monday to include today’s exceedances at the Liberty and North Braddock air quality...

Another weekend, another pair of air quality exceedances for the Mon Valley – concentrations of hydrogen sulfide at Allegheny County...

The values in red denote exceedances of PA’s 24-hour H2S standard of 0.005 ppm. Thursday marked the fourth straight day of air quality...

Smell something foul in your neighborhood? If you live in the Mon Valley that’s probably a resounding, “YES.” Terrible air quality has...

Ambient air concentrations of hydrogen sulfide (H2S) exceeded Pennsylvania’s 24-hour standard in North Braddock and Liberty on Wednesday...