State Development of Numeric Criteria for Nitrogen and Phosphorus Pollution
On this page you can learn more about the progress states are making towards the development of numeric criteria, what criteria they have developed, and the specific details about Clean Water Act adopted criteria, including values and parameters. Use the “Progress” tab to learn more about the status of numeric criteria development for nitrogen and phosphorus pollution throughout the country, as well as specific state information about the criteria. The “Total Nitrogen” and “Total Phosphorus” tabs provide more information about which states have Clean Water Act adopted statewide or site specific criteria for these parameters. Maps are provided for rivers and streams, lakes and reservoirs, and estuaries.
Progress
The map below provides a national summary of numeric criteria development for nitrogen and phosphorus pollution. Select a state from the map or links below to learn more about nutrient criteria development for a given state. Download the map (PDF).
Some states have already developed statewide and site specific nitrogen criteria for rivers and streams, lakes and reservoirs, and estuaries. Click on each map below to learn which states have developed such criteria.
Some states have already developed statewide and site specific phosphorus criteria for rivers and streams, lakes and reservoirs, and estuaries. Click on each map below to learn which states have developed such criteria.
