E. coli bacteria in water can make people sick.
E. coli bacteria is found in the feces of warm-blooded animals, including wildlife, livestock, waterfowl, and humans. High levels of E. coli in water indicate fecal contamination and the possible presence of pathogens harmful to humans. Human waste from poorly functioning septic systems, manure runoff from fields, and pet waste are just a few sources of E. coli contamination in local lakes and streams.
On Snapshot Water Monitoring Day, volunteers test for E. coli levels at sites across the watershed. While contamination levels and possible causes vary from site to site, we consistently find E. coli concentrations that do not meet state water quality standards. On the maps below, these sites are shown in yellow and red.
Explore full results below. Click on any map to zoom in.