Toolkit of Resources to Assist States with Adopting and Implementing Numeric Nutrient Criteria
This toolkit compiles U.S. Environmental Protection Agency resources to facilitate state adoption of numeric nutrient criteria. It includes information on: criteria and standards development; water quality monitoring, assessment, reporting, and planning; permitting, WQBELs, and trading; economics and financing; and communications materials. This dynamic toolkit will be updated as new materials are developed.
The EPA has also compiled information on states' and territories' progress in adopting numeric nutrient criteria as well as state nutrient data, respectively.
- State Development of Numeric Criteria for Nitrogen and Phosphorus Pollution Website
- Nutrient Indicators Dataset
Criteria Documents
- Actions to Help States Address Barriers to Numeric Nutrient Criteria Implementation (2012-2014) (pdf)
- Preventing Eutrophication: Scientific Support for Dual Nutrient Criteria Fact Sheet (pdf)
- Guiding principles for integrated nutrient criteria (bioconfirmation)
- Guiding Principles on an Optional Approach for Developing and Implementing a Numeric Nutrient Criterion that Integrates Causal and Response Parameters (pdf)
- Webinar: Guiding Principles for Developing and Implementing a Numeric Nutrient Criterion That Integrates Causal and Response Parameters (“Bioconfirmation”) (pdf)
- Expert Workshop: Nutrient Enrichment Indicators in Streams
- Multiple discharger variance FAQs (pdf)
- Nutrient Criteria Development Documents
- The EPA's Recommended Ambient Water Quality Criteria for Nutrients
- Revised water quality standards handbook
- Revised water quality standards regulations
- Stressor–response guidance for nutrient-based criteria
- Technical support compendium for numeric nutrient criteria
- “What is a new or revised water quality standard under CWA 303(c)(3)?” - FAQs
Water Quality Monitoring, Assessment, Reporting, and Planning
- AQUATOX
- Impaired waters and TMDLs
- Nonpoint source pollution management
- Water quality monitoring and assessment
Permitting, WQBELs, and Trading Guidance
- Case study of four wastewater treatment facilities in the Assabet River watershed who upgraded operations to meet phosphorus limits (pdf)
- OWM Emerging Technologies for Wastewater Treatment and In-plant Wet Weather Management
- Municipal Nutrient Removal Technologies Reference Document (pdf)
- Compliance Schedules for Water Quality-Based Effluent Limitations
- Discharge Monitoring Report (DMR) pollutant loading tool
- Case Studies on Implementing Low-Cost Modifications to Improve Nutrient Reduction at Wastewater Treatment Plants
- Nutrient Control Design Manual (pdf)
- Nutrient Control Design Manual: State of Technology Review Report (pdf)
- Nutrient Removal in Lagoon/Pond Treatment Systems, EPA ORD (pdf)
- OWM Water Quality Trading Toolkit
Economics/Financing
- Clean Water State Revolving Fund (CWSRF)
- Compendium of Clean Water Act financing
- Compilation of Cost Data Associated with the Impacts and Control of Nutrient Pollution
- Spreadsheet tools to evaluate economic impacts for variances, use attainability analyses, and antidegradation
- USDA Farm Service Agency Grants
- Water pollution control program grants (section 106)
Communications Materials
- Together, We Can All Help Restore Great Bay (Region 1 RA, op-ed)
- Community nutrient outreach website
- Nutrient management webinars