The degradation of streams has largely resulted from the impacts of historical stormwater management practices prior to current water quality rules and practices, and from the impacts of urbanization.
Pollution Control Projects install, retrofit, and maintain stormwater control measures (SCMs) to reduce pollution and control the volume and velocity of stormwater in developed watersheds where streams are degraded. They improve these watersheds by installing new SCMs to remove pollution or by increasing the efficiency of previously installed SCMs so they remove more pollution than originally designed. Some examples of SCMs include bioretention, wet ponds, wetlands and sand filters.
See the interactive map below to learn about specific Pollution Control Projects. More information and monitoring reports for these projects can be found on the Watershed Improvement page under Pollution Control and Pilot Stormwater Control Measures.