Group Against Smog & Pollution

GASP to Health Officials: Residents Deserve Answers on Mounting Mon Valley H2S Exceedances & What’s Being Done to Stop Days-Long Stench Episodes

Join GASP, Residents & Fellow Advocates to Speak Out on Mon Valley Stench; Demand Transparency on H2S Exceedance Problem

Health Department Launches H2S Dashboard Following Recent Calls from GASP to Ramp Up Transparency

Rotten Egg Stench & Poor Air Quality Return to Mon Valley

Air Pollution, Stench Pummels Mon Valley Over Holiday Period

Here's What the Post-Gazette Editorial Board Got Wrong About the Mon Valley's H2S Problem

2nd Day in a Row of Skyrocketing H2S for Mon Valley, 5th Exceedance of PA 24-Hour Standard in 6 Days

UPDATE: PA’s 1-Hr H2S Standard Exceeded in Mon Valley for 1st Time Since ‘15; GASP Demands Answers

Weekend Sees Yet Another H2S Exceedance for Mon Valley

Abysmal Air Quality Returns to Mon Valley as Three More H2S Exceedances Noted

<UPDATED> Abysmal Air Quality Continues in the Mon Valley

Allegheny Co. Health Dept. Issues Mon Valley Air Pollution Warning as PM2.5 Concentrations Spike

Mon Valley Sees 55th H2S Exceedance, Liberty-Clairton Air Quality Again Worst in Nation Friday

GASP Speaks Out About H2S Violations, Lack of Transparency Over U.S. Steel’s Edgar Thomson Plant

It’s Been Nearly 4 Years EPA, Public Deserves Transparency, Action Regarding Edgar Thomson Emissions

More Air Quality Exceedances for Mon Valley, Allegheny County on Pace to Exceed 2017 H2S Numbers

Air Quality Exceedances Mounting, GASP Again Calls on ACHD to Update Public on Mon Valley Pollution

More Unhealthy Air Quality, Exceedances Pervade Mon Valley – Update on H2S Problem Needed

Watchdog Report: Another Weekend, Another Pair of Air Quality Exceedances for Mon Valley

Mon Valley Experiences Multi-Day Bad-Air Episode, Two More Air Quality Exceedances