1. Technical Committee Meeting October 6-7, 2015 Agenda Item #9

2. On April 19, 1994 the CSO Policy was published and for decades Municipalities along the Ohio River have been trying to meet the Nine Minimum Controls and develop Long Term Control Plans. Municipalities have spent millions of dollars to achieve compliance with the Clean Water Act and meet Water Quality Standards. ORSANCO plans to use the historical bacteria data to look for possible trends at the six major CSO communities along the Ohio River where contact recreation sampling has taken place.

3. During 1992-1994 there was a single site sampled May thru October at six major CSO communities along the Ohio River. All of the sites except for Pittsburgh had a sampling frequency of five samples a month to produce a Geometric Mean. In 2000, sites were added to include an upstream, downtown, and downstream sample in each CSO community. Pittsburgh also began a sampling frequency of five samples a month. In 2009, one site was dropped at each of the CSO communities and Colilert sampling began in Cincinnati. In 2013 the month of April was added to the sampling plan.

4. SiteFecalE.coli 1.4L2001-2009 1.4M2001-2014 1.4R2001-2009 4.31994-20142000-2014 84.22006-2009 86.82001-2014 91.42001-2009 92.81992-20142000-2014 305.12001-2014 308.12001-2009 314.81992-20141993-2014 462.62001-2014 463.92007-2011 469.92007-2011 4702001-2014 477.51992-2014 5942001-2014 608.72001-2009 619.31994-2014 6261992-1993 791.52001-2014 793.72001-2014 797.31992-2009 937.9 1992-1993

5. SiteYears of Data with FecalYears of Data with E.coli 1.4L99 1.4M14 1.4R99 4.32115 84.244 86.814 91.499 92.82315 305.114 308.199 314.82322 462.614 463.955 469.955 47014 477.523 59414 608.799 619.321 62622 791.514 793.714 797.318 937.922

6. Contact Recreation Sites

7. Evaluate the temporal traits in the six CSO communities Compare the upstream sites to the downstream sites Look at previous fecal coliform trends assessment done in 1983 and compare with current assessment Use flow/precipitation to show possible seasonal trends

8. n=496 52% above 400 % Violation of WQS WQS 52% 38% 23% 36% 24% n=496 n=709 n=708 n=74 2 n=705 n=51 9

9. 1995-19992000-20042005-20092010-2014

10. 1995-19992000-20042005-20092010-2014

11. 1995-19992000-20042005-20092010-2014

12. 1995-1999 2000-20042005-20092010-2014

13. 1994-19992000-20042005-20092010-2014

14. 1995-19992000-20042005-2009