We publish recommended water quality criteria to reduce problems associated with excess nutrients in waterbodies in specific areas of the country. We work with states and tribes to adopt regional-specific and locally appropriate water quality criteria for nutrients in lakes, reservoirs, rivers, streams, and wetlands in fourteen ecoregions.
- Criteria Documents for Lakes and Reservoirs
- Criteria Documents for Rivers and Streams
- Ecoregional Criteria Document for Wetlands
- Summary Table for the Nutrient Criteria Documents (July 2002)
These tables present the recommended criteria for each of the aggregate nutrient ecoregions for the following parameters: Total Phosphorus, Total Nitrogen, Chlorophyll a, and Turbidity or Secchi. Criteria are presented for both Lakes & Reservoirs and Rivers & Streams.