Ambient Water Quality Criteria for Bacteria - Water Quality Standards ...

More documents

Recommendations

Info

11-30-2011 Components of EPA’s Criteria E. coli and enterococci criteria have two components: • Geometric mean • Single Sample Maximum or Upper Percentile Value Frequency of Observed Indicator Densities Geometric mean: • Assessing medium and long term impacts •WQBELS Indicator Density Single sample maximum •Beach monitoring 75 th percentile 95 th percentile
11-30-2011 Primary Contact Recreation Current Fresh Water Criteria Recommendations • Enterococci Risk Level (% of swimmers) • E. Coli Geometric Mean Density (per 100 mL) Single Sample Maximum Allowable Density (per 100 mL) 75 th percentile 82 nd percentile 90 th percentile 95 th percentile 0.8 33 62 79 107 151 Risk Level (% of swimmers) Geometric Mean Density (per 100 mL) Single Sample Maximum Allowable Density (per 100 mL) 75 th percentile 82 nd percentile 90 th percentile 95 th percentile 0.8 126 236 299 409 576
Page 1 and 2: 11-30-2011 Ambient Water Quality Cr
Page 3 and 4: 11-30-2011 Indicators EPA’s reco
Page 5 and 6: 11-30-2011 Results of Studies in th
Page 7: 11-30-2011 Bacteria Criteria in Wat
Page 11 and 12: 11-30-2011 What is the BEACH Act?
Page 13 and 14: Risk Levels 11-30-2011 Key Implemen
Page 15 and 16: Geo Mean and SSM in BEACH Act Water
Page 17 and 18: 11-30-2011 Uses of the SSM Beach a
Page 19 and 20: EPA’s New/Revised Criteria Object
Page 21 and 22: 11-30-2011 Revising the Rec Criteri
Page 23 and 24: Current Thinking on the Draft RWQC
Page 25 and 26: Current Thinking on the Draft RWQC
Page 27: Take Home Messages EPA’s current

Ambient Water Quality Criteria for Bacteria - Water Quality Standards ...

Create successful ePaper yourself

Delete template?

Save as template?