An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Criteria Development Guidance: Lakes and Reservoirs

The Nutrient Criteria Technical Guidance Manual: Lakes and Reservoirs is one in a series of waterbody-specific documents that support the National Nutrient Strategy. The intent of these documents is to provide States and Tribes with methods to assess waterbody nutrient impairment and develop ecoregion-specific nutrient criteria.

Complete document: Nutrient Criteria Technical Guidance Manual: Lakes and Reservoirs (PDF) (232 pp, 7 MB, About PDF) (EPA-822-B-00-001)

  • Chapter 1: Introduction
  • Chapter 2: Basis for Lake and Reservoir Nutrient Criteria
  • Chapter 3: Preliminary Steps for Criteria Development
  • Chapter 4: Establishing an Appropriate Database
  • Chapter 5: Candidate Variables for Criteria Setting
  • Chapter 6: Identifying and Characterizing Reference Conditions
  • Chapter 7: Nutrient Criteria Development
  • Chapter 8: Using Nutrient Criteria to Protect Water Quality
  • Chapter 9: Modeling Tools
  • References
  • Appendix A: Nutrient Region Descriptions
  • Appendix B: Case Studies