Arkansas Water Quality Standards
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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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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

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


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


Arkansas Ecoregions


Ouachita Mountains Ecoregion


Ouachita Mountains - DU


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


Water Quality Criteria

Consistent Scientifically with Designated Uses

Type of Criteria

Narrative

Numeric

Biological


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


Numeric Criteria - Toxics


Numeric Criteria


Numeric Criteria - Minerals


Biological Criteria


Clean Water Act Process

Taken From http://www.epa.gov/watertrain/cwa/slide.htm


Implementation

  • NPDES Permitting

  • Total Maximum Daily Load

  • Triennial Review

  • Regulation 2

  • 303d List

  • 305b Report

  • Continuing Planning Process


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