This dataset consists of a unified geospatial database that delineates total maximum daily load (TMDL) modeled waste load allocation (WLA) drainage basin boundaries intersecting...

This data resource is deprecated and scheduled for removal, as of October 8, 2025. The data resource - TMDL Alocation Areas - should be used in its place....

The Minnesota Pollution Control Agency (MPCA) has developed a statewide TMDL (Total Maximum Daily Load) Database to standardize and maintain spatial data related to TMDL...

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...

This is a set of the impaired wetlands as determined by MPCA in 2011 for the 2012 reporting cycling to US EPA. The wetlands are a subset and enhancement of the 1:24,000 scale...

This is a set of the impaired wetlands as determined by MPCA in 2009 for the 2010 reporting cycling to US EPA.The lakes are a subset and enhancement of the 1:24,000 scale...

This is the set of impaired streams as determined by MPCA in 2011 for the 2012 reporting cycle to US EPA. The streams are a subset and enhancement of the 1:24,000 scale National...

This is a set of the impaired lakes as determined by MPCA in 2009 for the 2010 reporting cycling to US EPA. The lakes are a subset and enhancement of the 1:24,000 scale National...

This is a set of the impaired streams as determined by MPCA in 2009 for the 2010 reporting cycling to US EPA.The streams are a subset and enhancement of the 1:24,000 scale...

This dataset represents impaired lakes as determined by MPCA in 2011 for the 2012 reporting cycle to US EPA.The lakes are a subset and enhancement of the 1:24,000 scale National...