Allegheny County Health Department (ACHD) officials announced that they took two temporary air quality monitors installed in Clairton and West Mifflin to measure sulfur dioxide levels offline.
The department announced the following in an Allegheny Alert issued Friday afternoon:
After a fire at the Clairton Coke Works on Dec. 24, 2018, ACHD’s air quality program installed temporary monitors in Clairton and West Mifflin to measure Sulfur dioxide levels (SO2) while the plant’s pollution controls were down.
The plant’s pollution controls have been back online since April of 2019. As a result, the air quality program disabled these two monitors during the week of Dec.16.
Measurements at both monitors when online were far below the hourly SO2 standard, which is 0.075 parts per million (ppm).