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Arkansas Water Quality Standards Ryan Benefield Deputy Director
16

Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Jan 17, 2016

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Juliana Russell
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Page 1: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Arkansas Water Quality Standards

Ryan BenefieldDeputy Director

Page 2: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Water Quality Standards

Picture Taken From http://www.epa.gov/watertrain/cwa/cwa3.htm

• Surface Waters

• Elements– Designated Uses– Water Quality

Criteria– Antidegredation

• Exemptions

Page 3: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

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

Page 4: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

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

Page 5: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Arkansas Ecoregions

Page 6: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Ouachita Mountains Ecoregion

Page 7: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Ouachita Mountains - DU

Page 8: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

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

Page 9: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Water Quality Criteria

•Consistent Scientifically with Designated Uses

•Type of Criteria

–Narrative

–Numeric

–Biological

Page 10: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

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

Page 11: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Numeric Criteria - Toxics

Page 12: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Numeric Criteria

Page 13: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Numeric Criteria - Minerals

Page 14: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Biological Criteria

Page 15: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Clean Water Act Process

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

Page 16: Arkansas Water Quality Standards Ryan Benefield Deputy Director.

Implementation

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