Portage-Hwy 12

Data time: 11/8/2026 2:00 PM CST
Monitoring Site
Location
Address:
Bethlehem Steel Waste Lagoon Hwy 12
City:
Portage
Latitude:
41.616561
Longitude:
-87.146921
Region:
North West
Air Quality Information
Pollutant Concentration Units of Measure
PM10 24-Hour Average 12 UG/M3
Monitored Pollutants
Pollutant Concentration Units of Measure
PM10 STD 21 UG/M3

Site Details

The Portage – Hwy 12 monitoring site began operating in August 1987. The monitoring objective is to measure PM10 in Portage south of the Cleveland-Cliffs’ Burns Harbor steel mill.

Historical Data Concentration