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Arkansas Water Quality Standards

Arkansas Water Quality Standards. Ryan Benefield Deputy Director. Surface Waters Elements Designated Uses Water Quality Criteria Antidegredation Exemptions. Water Quality Standards. Picture Taken From http://www.epa.gov/watertrain/cwa/cwa3.htm. Designated Uses.

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Arkansas Water Quality Standards

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  1. Arkansas Water Quality Standards Ryan Benefield Deputy Director

  2. Surface Waters Elements Designated Uses Water Quality Criteria Antidegredation Exemptions Water Quality Standards Picture Taken From http://www.epa.gov/watertrain/cwa/cwa3.htm

  3. Designated Uses Those uses specified in the water quality standards for each water body or stream segment whether or not they are being attained. • Extraordinary Resource Waters (ERW) • Ecologically Sensitive Waterbody • Natural and Scenic Waterways • Primary Contact Recreation • Secondary Contact Recreation • Fisheries (Soon to be labeled Aquatic Life) • Domestic Water Supply • Industrial Water Supply • Agricultural Water Supply

  4. Designating Waterbodies • Must Designate All Existing Uses *November 28, 1975 • Fishable/Swimmable Required (Rare Exceptions) • Waste Transport Not Acceptable Picture Taken From http://www.epa.gov/watertrain/cwa/cwa7.htm

  5. Arkansas Ecoregions

  6. Ouachita Mountains Ecoregion

  7. Ouachita Mountains - DU

  8. Reclassification of DUs Can not be an “Existing Use” Use Attainability Analysis Natural Condition Irreversible Human Condition Attainment would cause more harm Social and Economic Costs Public Participation Required EPA Review and Approval

  9. Water Quality Criteria Consistent Scientifically with Designated Uses Type of Criteria Narrative Numeric Biological

  10. Narrative Criteria Nutrients Materials stimulating algal growth shall not be present in concentrations sufficient to cause objectionable algal densities or other nuisance aquatic vegetation or otherwise impair and designated use of the waterbody

  11. Numeric Criteria - Toxics

  12. Numeric Criteria

  13. Numeric Criteria - Minerals

  14. Biological Criteria

  15. Clean Water Act Process Taken From http://www.epa.gov/watertrain/cwa/slide.htm

  16. Implementation • NPDES Permitting • Total Maximum Daily Load • Triennial Review • Regulation 2 • 303d List • 305b Report • Continuing Planning Process

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