Total Maximum Daily Loads (TMDLs) Revision as of 13:05, 13 August 2019 by Mtrojan (talk | contribs)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) Total Maximum Daily Loads (TMDLs)

Total Maximum Daily Loads (TMDLs) are EPA approved amounts of pollutant loading that can occur and have a water body meet water quality standards. This page is collection of links and resources to better understand, and meet, TMDL requirements.

Confluence of the St. Croix and Mississippi river. Note the St. Croix River is not impaired for sediment, while the Mississippi River is impaired.

TMDL guidance

• Summary of TMDL requirements in stormwater permits
• Forms, guidance, and resources for completing the TMDL annual report form
• Chloride
• Bacteria
• Dissolved oxygen, oxygen demand, temperature, and nitrogen

TMDL toolkit for MS4 permit compliance

• Overview of models used to meet MS4 TMDL permit requirements
• Recommendations and guidance for utilizing P8 to meet TMDL permit requirements
  • Case study for using P8 to meet TMDL permit requirements
• Recommendations and guidance for utilizing WINSLAMM to meet TMDL permit requirements
  • Case study for using WINSLAMM to meet TMDL permit requirements
• Recommendations and guidance for utilizing the MIDS calculator to meet TMDL permit requirements
  • MIDS calculator
  • Case study for using the MIDS calculator to meet TMDL permit requirements
• Recommendations and guidance for utilizing the MPCA Simple Estimator to meet TMDL permit requirements
  • MPCA Simple Estimator
  • Case study for using the MPCA Simple Estimator to meet TMDL permit requirements
• Recommendations and guidance for utilizing monitoring to meet TMDL permit requirements
• Case studies for monitoring to meet TMDL permit requirements

TMDL guidance and general information

• Overview of TMDLs
• Addressing TMDL Requirements in MS4 General Permit Applications and Stormwater Pollution Prevention Program Documents
• List of approved TMDLs with MS4 Wasteload Allocations
• MPCA guidance for setting wasteload allocations for regulated stormwater
• Technical guidance used by MPCA to develop guidelines for setting TMDL WLAs for regulated stormwater
• Case studies for regulated stormwater issues
• Guidance on what discharges should be included in the TMDL wasteload allocation for MS4 stormwater
• Fact sheet on what discharges should be included in the TMDL wasteload allocation for MS4 stormwater
• Guidance for addressing large watershed TMDL studies
• Guidance for developing TMDL implementation plans for MS4 stormwater
• Fact sheet for developing TMDL implementation plans for permitted MS4 stormwater
• File:Guidance on What Discharges Should be Included in the TMDL Wasteload Allocation for MS4 Stormwater.docx - August 2010
• Construction activity by county

Information received from MS4 permittees

• Summary of data received from permittees on MS4 TMDL permit reporting forms

Links and other resources

• Links for TMDLs - we should get rid of this page
• Visit the MPCA TMDL Project page for information on specific projects across the state
• Total Suspended Solids (TSS)
• Phosphorus
• Bacteria in stormwater
• Chloride in stormwater
• Protection and restoration of receiving waters