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Municipal Separate Storm Sewer System (MS4) boundaries in Minnesota
In general terms, MS4s are publicly owned or operated stormwater infrastructure, used solely for stormwater, and which are not part of a publicly owned wastewater treatment... -
National Hydrography Dataset (NHD) - Minnesota
The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface... -
Statewide Altered Watercourse Project
The Altered Watercourse Project was a joint effort between the Minnesota Pollution Control Agency (MPCA) and Minnesota Geospatial Information Office (MnGeo) to create a... -
Current Stream Water Units in Minnesota
A two-dimensional representation of all streams within the State of Minnesota, with associated attributes. This data set is built on the 24,000 National Hydrography Dataset.... -
What's In My Neighborhood Sites
The MPCA's What's in My Neighborhood contains a wide variety of environmental information about your community. This includes potentially contaminated sites, permits, licenses,... -
TMDL Wasteload Allocation Areas for MS4s
This dataset consists of a unified geospatial database that delineates total maximum daily load (TMDL) modeled waste load allocation (WLA) drainage basin boundaries intersecting... -
St. Louis River Area of Concern Sediment Assessment Areas
The St. Louis River is the second-largest tributary to Lake Superior. The lower estuary culminates in the Duluth-Superior Harbor, which is the largest freshwater seaport in... -
MPCA Impaired Waters Viewer
Under the federal Clean Water Act, states are required to monitor and assess their waters to determine if they meet water quality standards and thereby support the beneficial... -
MPCA Surface Water API
The MPCA Surface Water API provides public access to data about surface water bodies, assessments and impairments of surface water, monitoring stations, and analytical results... -
Surface Waters Assessed for Chloride
The MPCA and its partners systematically evaluate waters in each major watershed in Minnesota every 10 years. This process begins with comprehensive lake and stream water...
