Streamwatch Indications for New Guidelines report SING 2017 Acknowledgements Contents Acknowledgements ............................................................................................................................... 2 Introduction .......................................................................................................................................... 1 ANZECC Guidelines................................................................................................................................ 2 Trigger values vs. Locally derived Guidelines ........................................................................................ 3 Nominal Range guidelines .................................................................................................................... 5 Rationale ........................................................................................................................................... 5 Temporal change .............................................................................................................................. 5 Percentile bandwidth ........................................................................................................................ 5 Seasonal values and data treatment and filtering ............................................................................ 8 Water Quality Parameters .................................................................................................................... 9 Program and Regional overview ......................................................................................................... 10 Methodology ....................................................................................................................................... 12 Data Collation and Filtering ............................................................................................................ 12 Data Analysis ................................................................................................................................... 12 Results ................................................................................................................................................. 13 Aggregations ................................................................................................................................... 13 Whole of Program area ............................................................................................................... 13 Regional Aggregate Southern area ............................................................................................. 18 Regional Aggregate Hacking River .............................................................................................. 21 Regional Aggregate Botany Bay area .......................................................................................... 24 Regional Aggregate Lower Georges River area ........................................................................... 27 Regional Aggregate Hawkesbury Nepean freshwater area ........................................................ 31 Regional Aggregate Blue Mountains area................................................................................... 35 Regional Aggregate Parramatta River tributaries ....................................................................... 38 Regional Aggregate Peri-Urban 1 Northeast .............................................................................. 42 Regional Aggregate Peri-Urban 2 Northeast .............................................................................. 46 Regional Aggregate Well Vegetated Northeast .......................................................................... 50 Regional Aggregate Northwest area ........................................................................................... 53 Sites: Southern area ........................................................................................................................ 57 The Illawarra Grammar School - ................................................................................................. 57 American Creek, Cordeaux Road ............................................................................................ 57 Wollondilly Anglican College – .................................................................................................... 58 Bargo River, Kiah Ridge, Bargo River Road Bridge .................................................................. 58 Bargo River, Potholes crossing, Rockford Bridge .................................................................... 59 Yallah TAFE – ............................................................................................................................... 60 Duck Creek .............................................................................................................................. 60 Campbelltown Bushcare – .......................................................................................................... 61 Menangle Creek, Northern Dam Noorumba Reserve ............................................................. 61 Sites: Hacking River ......................................................................................................................... 62 Royal national park NPWS – ....................................................................................................... 62 Hacking River, McKells Avenue ............................................................................................... 62 Hacking River, Otford Road Causeway .................................................................................... 63 Hacking River, Red Cedar Flat ................................................................................................. 64 Kangaroo Creek, Allambie Flat ................................................................................................ 65 Wattamolla Lagoon, near palm tree ....................................................................................... 66 Kyogle Bushcare Group – ............................................................................................................ 67 Kyogle Creek, Northwest Arm Road ....................................................................................... 67 Sites: Botany Bay area ..................................................................................................................... 68 Blakehurst High School – ............................................................................................................ 68 Blakehurst HS Below courts .................................................................................................... 68 Blakehurst HS, West Street Reserve ....................................................................................... 69 Bronte Gully - .............................................................................................................................. 70 Bronte Gully below waterfall .................................................................................................. 70 Bronte Gully above filter blocks .............................................................................................. 71 Laperouse Coastcare – ................................................................................................................ 72 Happy Valley Creek, Botany Bay National Park ...................................................................... 72 Sites: Lower Georges River area ..................................................................................................... 73 Myles Dunphy Bushland Group – ............................................................................................... 73 Dairy Creek, Cromdale Road ................................................................................................... 73 Gungah Bay tributary (unnamed), Mulga Rd drain ................................................................. 74 Gungah Bay tributary (unnamed), Oatley shops inlet ............................................................ 75 Liverpool Bushcare – ................................................................................................................... 76 Elouera Reserve Cabramatta Creek ........................................................................................ 76 Jannali Reserve Bushcare group – .............................................................................................. 77 Tudar road, constructed wetland pontoon ............................................................................ 77 Sites: Hawkesbury Nepean freshwater area ................................................................................... 78 St Andrews College – .................................................................................................................. 78 Breakfast Creek, Harvey Park .................................................................................................. 78 Wallacia Streamwatch – ............................................................................................................. 79 Jerrys Creek, Crossman Reserve, Park Road ........................................................................... 79 Jerrys Creek, Mulgoa Road...................................................................................................... 80 Nepean River, Vickery Road ...................................................................................................