Water Quality Monitoring in Ozaukee County Wisconsin Department of Natural Resources River Protection Planning Grant RP31018 Final Report Prepared By: Ozaukee County Planning and Parks Department 121 W. Main Street Port Washington, WI 53074 June 30, 2020 Draft Final Table of Contents Introduction ............................................................................................................................................. 5 Project Objectives ................................................................................................................................. 10 Monitoring Design ................................................................................................................................ 10 Monitoring Locations ............................................................................................................................ 11 Methods ................................................................................................................................................ 16 General Water Quality Sampling Method Requirements & Quality Assurance/Quality Control .......... 16 Discrete Water Quality Sampling Methods ........................................................................................ 16 Continuous Water Quality Sampling Methods ................................................................................... 18 Additional Data Collection ................................................................................................................ 20 Section 1: Little Menomonee River Results ........................................................................................... 20 Chloride ............................................................................................................................................ 20 Total Phosphorus and Orthophosphate (Dissolved Reactive Phosphorus) ........................................... 22 Total Suspended Solids ...................................................................................................................... 25 E. coli ................................................................................................................................................ 26 Dissolved Oxygen ............................................................................................................................. 28 Conductivity ...................................................................................................................................... 29 pH ..................................................................................................................................................... 31 Salinity .............................................................................................................................................. 32 Total Dissolved Solids ....................................................................................................................... 34 Turbidity ........................................................................................................................................... 35 Water Temperature ............................................................................................................................ 37 Continuous Data ................................................................................................................................ 38 City of Mequon 1 at Freistadt Road................................................................................................ 39 Green Seams 3 at Mequon Road .................................................................................................... 41 City of Mequon Property 3 (Lemke Park) ...................................................................................... 44 E. coli Analysis ................................................................................................................................. 48 Section 2: Mole Creek Results ............................................................................................................... 51 Chloride ............................................................................................................................................ 51 Total Phosphorus and Orthophosphate (Dissolved Reactive Phosphorus) ........................................... 52 Total Suspended Solids ...................................................................................................................... 54 E. coli ................................................................................................................................................ 56 Dissolved Oxygen ............................................................................................................................. 57 Conductivity ...................................................................................................................................... 58 pH ..................................................................................................................................................... 60 2 Salinity .............................................................................................................................................. 61 Total Dissolved Solids ....................................................................................................................... 62 Turbidity ........................................................................................................................................... 63 Water Temperature ............................................................................................................................ 64 Continuous Data ................................................................................................................................ 66 Below Confluence South of Highway 33 ........................................................................................ 66 South of Hillcrest ........................................................................................................................... 68 Downstream of Cedar Sauk Road................................................................................................... 71 E. coli Analysis ................................................................................................................................. 75 Section 3: Ulao Creek Results................................................................................................................ 79 Chloride ............................................................................................................................................ 79 Total Phosphorus and Orthophosphate (Dissolved Reactive Phosphorus) ........................................... 81 Total Suspended Solids ...................................................................................................................... 84 E. coli ................................................................................................................................................ 86 Dissolved Oxygen ............................................................................................................................. 88 Conductivity ...................................................................................................................................... 89 pH ..................................................................................................................................................... 91 Salinity .............................................................................................................................................. 92 Total Dissolved Solids ....................................................................................................................... 94 Turbidity ........................................................................................................................................... 95 Water Temperature ............................................................................................................................ 97 Continuous Data ................................................................................................................................ 98 Below Kaul Creek Confluence ....................................................................................................... 98 Below Helms Creek Confluence .................................................................................................. 100 Gateway ...................................................................................................................................... 102 Downstream of the Railroad Tracks (Central to the Restoration Site) in Gateway ......................... 104 E. coli Analysis ............................................................................................................................... 106 Section 4: 2019 Discharge and Loading Profiles .................................................................................. 110 Upper Little Menomonee River System ........................................................................................... 111 Mole Creek...................................................................................................................................... 114 Ulao and Kaul Creek System ..........................................................................................................