Historical Point Source Discharges to the St. Croix River

There have been as many as 160-180 permitted point source dischargers including municipal, industrial, and agricultural facilities in the St. Croix Valley since 1905. A population of 150,000 lived in the St. Croix Valley from 1900 to 1950, but has since steadily increased to nearly 400,000 in the 2000 census. Over 500,000 residents are predicted by 2020. About 1/3 of the population is served by wastewater treatment.