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Recreational Uses & Criteria. Chapter 307.7. 2000 TSWQS. Changed the indicator bacteria from fecal coliform to E. coli in freshwater and Enterococci in saltwater. Fecal coliform Alternative instream indicator Oyster waters Uses & criteria Swimming advisory programs.

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Presentation Transcript

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2000 TSWQS

  • Changed the indicator bacteria from fecal coliform to E. coli in freshwater and Enterococci in saltwater.

  • Fecal coliform

    • Alternative instream indicator

  • Oyster waters

    • Uses & criteria

  • Swimming advisory programs


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Contact Recreation(2000 TSWQS)

  • Recreational activities involving a significant risk of ingestion of water

    • wading by children

    • swimming

    • water skiing

    • diving

    • surfing

  • Risk levels

    • Freshwater: 8 illnesses per 1000 swimmers

    • Saltwater: 19 illnesses per 1000 swimmers

  • Geometric means

    • Freshwater (E. coli): 126 per 100 ml

    • Saltwater (Enterococci): 35 per 100 ml

  • Single sample number

    • Freshwater: 394 per 100 ml (moderate use)

    • Saltwater: 89 per 100 ml (designated bathing beach)


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Noncontact Recreation(2000 TSWQS)

  • Aquatic recreational pursuits not involving a significant risk of water ingestion

    • fishing

    • commercial and recreational boating

    • limited body contact incidental to shoreline activity.

  • Risk levels

    • Freshwater: 14 illnesses per 1000 swimmers

    • Saltwater: 27 illnesses per 1000 swimmers

  • Geometric means

    • Freshwater (E. coli): 605 per 100 ml

    • Saltwater (Enterococci): 168 per 100 ml


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2000 TSWQS Uses & Criteria

  • Unclassified water bodies

    • Presumed contact recreation use

    • Shift in EPA regulation to require UAAs for uses less than primary contact recreation

    • Public concern to protect for primary contact recreation

    • 1986 lawsuit against EPA on 1984 TSWQS

      • Complaint: Some of the water bodies with relatively low standards for recreational use were not addressed by an appropriate UAA.

    • 1988 TSWQS revisions

      • Applied fecal coliform criteria for contact recreation to unclassified waters.

  • Classified water bodies (Appendix A)

    • 8 segments – noncontact recreation use

      • 7 of the 8 segments – contact recreation criteria

    • 2 segments (1006 & 1007)

      • No designated recreation use

      • Noncontact recreation criteria


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Topics Discussed during 2000 revisions

  • Subcategories of uses

    • General recreation

      • streams & rivers

      • Assess when conditions are suitable

    • High-use recreation

      • Freshwater lakes, reservoirs, saltwater bays, Gulf of Mexico & other kinds of water bodies may be individually designated in Appendix A

      • Assess at all conditions

  • Numerous comments and concerns received

  • Deleted subcategories of contact recreation & the proposal to assess contact recreation only when conditions are suitable


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Background Information

  • Ambient Water Quality Criteria for Bacteria -1986

  • Draft Implementation Guidance-Nov. 2003

  • Beach Act

  • Final Rule: WQS for Coastal & Great Lakes Recreational Waters

  • EPA Coastal Recreation Waters Fact Sheets

  • Draft Frequently Asked Questions - inland waters


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EPA Region 6 Options for Establishing Bacteria Criteria

  • Revise single sample (SS) criteria for saltwater

  • Update the standard deviation used in deriving SS criteria

  • Consider the adoption of SS criteria based on the level of use

  • Consider other risk levels for the criteria to protect recreation uses

  • Conduct use attainability analyses

  • Use of the SS criteria for specific purposes rather than use attainment decisions

  • Limit application of bacteriological criteria in waters affected solely by non-human sources



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Options to Consider for Recreational Uses and Criteria

  • Enterococci freshwater criteria: elevated non-tidal salinity in West Texas streams.

  • Revise saltwater single sample criteria for enterococci

  • Leave fecal coliform as alternative indicator in effluent limits

  • Single sample numbers: remove “should not exceed” and replace with “is”

  • Clarification- enterococci in oyster waters is the recreational indicator

  • Recreational UAA guidance in Implementation Procedures


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Options under Evaluation

  • Broader range of recreational uses

  • Freshwater and saltwater risk levels

  • Non-human sources of bacteria

  • Options for Presumptions (Freshwater)

  • Update the freshwater single sample number


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