There are 165 Pollution Control Companies in Maryland, serving a population of 5,996,079 people in an area of 9,707 square miles. There is 1 Pollution Control Company per 36,339 people, and 1 Pollution Control Company per 58 square miles.
The state of Maryland is ranked 27th in Pollution Control Companies per capita, and 7th in Pollution Control Companies per square mile.