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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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2000 tswqs
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
contact recreation 2000 tswqs
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)
noncontact recreation 2000 tswqs
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
2000 tswqs uses criteria
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
topics discussed during 2000 revisions
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
background information
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
epa region 6 options for establishing bacteria criteria
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
options to consider for recreational uses and criteria
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
options under evaluation
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