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2016 Water Quality Assessment Update (thru Sep. 2016)

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Presentation on theme: "2016 Water Quality Assessment Update (thru Sep. 2016)"— Presentation transcript:

1 2016 Water Quality Assessment Update (thru Sep. 2016)
Ed Sherwood Tampa Bay Estuary Program 263 13th Ave. South St. Petersburg, FL 33701

2 Annual NMC Compliance Assessment (2009 – Present)
Assess Chl-a annually over 5-yr RA period Additional reporting triggered when Chl-a above thresholds for 2 straight years Bay Segment / Entity TN Loads investigated May require adjustment of Bay Segment TN TMDL and/or Entity-Specific Load Allocations

3 Chlorophyll-a: Historic Annual Means

4 Chlorophyll-a: 2016 Monthly Mean Comparisons

5 Bay Segments Meeting FDEP Threshold?
Year OTB HB MTB LTB 1974 No Yes 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 Bay Segment Chlorophyll-a (ug/L) 2016 Average (as of Sep.) (5th Year) FDEP RA Thresholds Old Tampa Bay 9.6 9.3 Hillsborough Bay 11.6 15.0 Middle Tampa Bay 5.3 8.5 Lower Tampa Bay 3.0 5.1 RA Compliance Assessment Period

6 DATA USED TO ASSESS ANNUAL REASONABLE ASSURANCE
Summary To Date All bay segments, except Old Tampa Bay, on track to be below chlorophyll-a thresholds thru September Final RA Assessment Year (Chl-a conditions in 2016) will determine if OTB TMDL / allocations will need further assessment. Seagrass acreage in Tampa Bay continues to increase, even in OTB. Expecting 2016 seagrass coverage assessment by the end of year. Bay Segment Reasonable Assurance Assessment Steps DATA USED TO ASSESS ANNUAL REASONABLE ASSURANCE Year 1 (2012) Year 2 (2013) Year 3 (2014) Year 4 (2015) Year 5 (2016) NMC Action 1: Determine if observed chlorophyll-a exceeds FDEP threshold of 9.3 mg/L 7.8 mg/L (No) 8.7 mg/L (No) 7.9 mg/L (No) 10.7 mg/L (Yes) 9.6 mg/L (Yes) NMC Action 2: Determine if any observed chlorophyll-a exceedences occurred for 2 consecutive years No Yes NMC Action 3: Determine if observed hydrologically- normalized total load exceeds federally-recognized TMDL of 486 tons/year N/A ??? NMC Actions 4-5: Determine if any entity/source/facility specific exceedences of 5-yr average allocation occurred during implementation period

7 2015 & 2016 Chlorophyll-a Spatial Distribution

8 Questions?


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