Water: Water Quality Standards Academy
You are here: WaterEducation & TrainingTraining ProgramsWater Quality Standards AcademyDevelopment of Site-Specific Criteria: Highlights
Development of Site-Specific Criteria: Highlights
- Listing Impaired Waters and Developing TMDLs
- Monitoring & Assessment
- NPDES Permit Program
- Human Health Ambient Water Quality Criteria
- Aquatic Life Criteria
- EPA's Role
- Two Concentration-Related Criteria
- Steps in Deriving the Criteria
- Prioritizing Chemicals
- Collecting Effects Data
- Assessing Acute Effects Data
- Calculate the GMAVs
- Rank the GMAVs
- Calculate the FAV
- From FAV to CMC
- Factoring in Water Characteristics
- CCC Approach Based on Available Data
- Assessing Chronic Effects Data
- CCC Calculation of the FCV
- FCV to CCC
- Criteria Review Process
- Site-Specific Criteria
Basic Course: Supplemental Topics
In some locations, the nationally recommended aquatic life criteria may be considered under- or overprotective if the species at a site have different sensitivities than those included in the national criteria data set. For instance, physical and/or chemical characteristics at a site can alter the biological availability and/or toxicity of a material. For this reason, site-specific criteria may be developed to address such conditions.
Site-specific procedures consist of:
- Defining the site boundaries.
- Determining the effect of biological, physical, or chemical characteristics on sensitivity or bioavailability and toxicity.
- Calculating numerical criteria by applying the recalculation procedure, the water-effect ratio procedure, or the resident species procedure.
Key Point. EPA regulations allow States and Tribes to develop site-specific aquatic life criteria. The Agency then considers the adequacy of the criteria during its review of the State/Tribe’s water quality standards. In general, EPA approves site-specific criteria if they are supportive of the designated uses established in the State/Tribe’s water quality standards and the criteria are based on sound scientific rationales.