Last year the city of Sioux Falls posted results at https://www.siouxfalls.org/public-works/environmental-recycling-hazardous/surface-water-quality/historic-ecoli.aspx
Resources of organizations and projects for our river:
2. Upper Sioux River Watershed Project
3. Mayors Big Sioux River Water Summit
5. DENR Big Sioux River Watershed Strategic Plan
6. South Dakota Buffer Strip Tax Incentive