Final Integrated Water Quality Assessment for Florida: 2018 Sections 303(d), 305(b), and 314 Report and Listing Update Division of Environmental Assessment and Restoration Florida Department of Environmental Protection June 2018 2600 Blair Stone Rd. Tallahassee, FL 32399-2400 floridadep.gov Final Integrated Water Quality Assessment for Florida: 2018 Sections 303(d), 305(b), and 314 Report and Listing Update, June 2018 This Page Intentionally Blank. Page 2 of 156 Final Integrated Water Quality Assessment for Florida: 2018 Sections 303(d), 305(b), and 314 Report and Listing Update, June 2018 Letter to Floridians Page 3 of 156 Final Integrated Water Quality Assessment for Florida: 2018 Sections 303(d), 305(b), and 314 Report and Listing Update, June 2018 Acknowledgments This document was prepared by staff in the following offices of the Florida Department of Environmental Protection: Division of Environmental Assessment and Restoration • Bureau of Laboratories: o Biology Section. • Water Quality Standards Program: o Standards Development Section. o Aquatic Ecology and Quality Assurance Section. • Water Quality Assessment Program: o Watershed Assessment Section. o Watershed Monitoring Section. • Water Quality Evaluation and Total Maximum Daily Loads (TMDL) Program: o Groundwater Management Section. o Watershed Evaluation and TMDL Section. • Water Quality Restoration Program: o Watershed Planning and Coordination Section. Page 4 of 156 Final Integrated Water Quality Assessment for Florida: 2018 Sections 303(d), 305(b), and 314 Report and Listing Update, June 2018 Table of Contents Letter to Floridians ........................................................................................................................3 Acknowledgments ..........................................................................................................................4 List of Acronyms and Abbreviations .........................................................................................12 Executive Summary .....................................................................................................................15 Issues of Environmental Interest and Water Quality Initiatives.............................................15 Introduction ..................................................................................................................................20 Chapter 1: Issues of Environmental Interest and Water Quality Initiatives .........................22 Monitoring Emerging Contaminants (ECs) and Pesticides ....................................................22 Using Chemical Wastewater Tracers to Identify Pollutant Sources .......................................23 Supporting Florida Water Resources Monitoring Council Projects .......................................25 Monitoring Harmful Algal Blooms (HABs) ...........................................................................26 Implementing and Expanding MST ........................................................................................28 Using the Nitrogen Source Inventory and Loading Tool (NSILT) for Nutrient-Impaired Springs ....................................................................................................................................29 Implementing NNC to Address Nutrient Enrichment ............................................................29 Testing for Pesticides in Surface Waters ................................................................................31 Conducting the South Florida Canal Aquatic Life Study .......................................................31 Triennial Review of Florida's Water Quality Standards .........................................................32 Improving Water Quality Modeling Coordination between DEP and the WMDs .................33 Chapter 2: Statewide Probabilistic and Trend Assessments, 2014–16 ...................................36 Background .............................................................................................................................36 Water Resources Monitored ...................................................................................................36 Summary of Status Network Surface Water Results ..............................................................37 Scope of Assessment ......................................................................................................37 Results for Rivers, Streams, Canals, Large Lakes, and Small Lakes ............................42 Sediment Quality Evaluation ........................................................................................53 Discussion of Rivers, Streams, Canals, Large Lakes, and Small Lakes .......................57 Summary of Status Network Groundwater Results ................................................................57 Discussion of Confined and Unconfined Aquifers ........................................................57 Summary of Surface Water and Groundwater Trend Network Results .................................63 Overview .......................................................................................................................63 Surface Water Trends ....................................................................................................63 Groundwater Trends .....................................................................................................65 Chapter 3: Designated Use Support in Surface Waters ...........................................................68 Background .............................................................................................................................68 303(d) Listed Waters ..............................................................................................................69 Page 5 of 156 Final Integrated Water Quality Assessment for Florida: 2018 Sections 303(d), 305(b), and 314 Report and Listing Update, June 2018 Assessment Results ........................................................................................................69 Impairment Summary ....................................................................................................73 Biological Assessment ...................................................................................................76 Delisting ........................................................................................................................77 Drinking Water Use Support ..................................................................................................77 Overlap of Source Water Areas and Impaired Surface Waters ....................................79 Chapter 4: TMDL Program and Priorities ...............................................................................81 Chapter 5: BMAP Program ........................................................................................................84 Chapter 6: Groundwater Monitoring and Assessment ............................................................90 Overall Groundwater Quality .................................................................................................90 Groundwater Quality Issues and Contaminants of Concern, Including Potable Water Issues ................................................................................................................................................93 VOCs .............................................................................................................................96 SOCs ..............................................................................................................................96 Nitrate ...........................................................................................................................96 Primary Metals .............................................................................................................96 Saline Water ..................................................................................................................97 Radionuclides ................................................................................................................98 THMs .............................................................................................................................98 Bacteria (Coliform) .......................................................................................................98 Summary of Groundwater Contaminant Sources ...................................................................99 Petroleum Facilities ......................................................................................................99 Drycleaning Solvent Facilities ....................................................................................100 Waste Cleanup and Monitoring Sites ..........................................................................100 Nonpoint Sources ........................................................................................................100 Groundwater–Surface Water Interaction ..............................................................................101 Setting and Pathways ..................................................................................................101 Groundwater Influence on Impaired Surface Waters .................................................101 References ...................................................................................................................................108 Appendices ..................................................................................................................................111