US EPA determined that Metalico is a major source of air pollution. Neighbors and air activists have been complaining about odors and pollution for years.
When the coke plant in Monessen started back up in September, so did the air quality complaints. Its previous owner agreed to a nearly $2 million settlement for air violations.
The stinky smell that hung over Pittsburgh was caused by a broken valve at the Neville Chemical plant. Nearly 1,000 pounds of hazardous air pollutants were released.
The Clairton Coke Works is the biggest emitter of H2S in Pennsylvania and is "likely a substantial contributor" to the stinky toxic pollutant in the Mon Valley.
