Rock Creek Environmental Studies Center

2005 Bronson Creek water quality data

10/12/2005 HydroLab (ESR 202)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm Temp. °C Dissolved Oxygen % Specific Conductivity uS/cm Salinity ppt Total Dissolved Solids ppm Oxygen Reduction Potential mV
Below Hwy 26 Culvert 7.85 7.36 11.29 67.3 231 0.11 150 161
Wooded Area 7.87 7.48 11.20 65.0 233 0.11 149 175
East Side of Pool 7.68 7.00 11.88 69.9 312 0.15 201 112
Above Cornell Rd. 8.14 8.81 12.11 82.0 231 0.11 148 156
Wetland Outlet 8.29 8.86 12.27 83.0 233 0.11 149 166
Above Footbridge 7.86 2.20 13.90 28.8 234 0.11 150 80

10/12/2005 LaMotte Kit (ESR 202)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm (mg/L) Carbon Dioxide Concentration ppm (mg/L) Silicon Dioxide Concentration ppm (mg/L) Hardness ppm (mg/L) Nitrate ppm (mg/L) Phosphate ppm (mg/L)
Below Hwy 26 Culvert 7.5 2.1 9 <0.5 100 <0.2 <0.2
Above Cornell Rd. 7.3 9.4 19.5 10.0 95 <0.2 <0.2
Wetland Outlet 7.5 2.2 19 14.5 86 <0.2 <0.2

10/19/2005 HydroLab (ESR 202)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm Temp. °C Dissolved Oxygen % Specific Conductivity uS/cm Salinity ppt Total Dissolved Solids ppm Oxygen Reduction Potential mV
Below Hwy 26 Culvert 7.39 6.26 14.22 61.8 209 0.10 134 193
Wooded Area 7.38 6.50 14.23 63.5 212 0.10 136 175
East Side of Pool 7.23 5.96 14.51 58.6 288 0.14 189 60
Above Cornell Rd. 7.39 7.16 14.4 70.2 216 0.10 138 199
Wetland Outlet 7.60 7.24 14.62 71.4 211 0.10 132 241
Above Footbridge 7.46 3.66 16.24 37.6 158 0.07 101 168
Above BeaverDam 7.41 7.46 14.54 73.4 216 0.10 139 216
Storm Drain 7.71 6.55 14.75 63.5 45 0.01 22 245

10/19/2005 LaMotte Kit (ESR 202)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm (mg/L) Carbon Dioxide Concentration ppm (mg/L) Silicon Dioxide Concentration ppm (mg/L) Hardness ppm (mg/L) Nitrate ppm (mg/L) Phosphate ppm (mg/L)
Below Hwy 26 Culvert 7.5 8.0 11 24 72 <0.2 <0.2
Above Cornell Rd. 6.5 7.2 8 21 72 <0.2 <0.2
Wetland Outlet 7.5 3.8 7 15 60 <0.2 <0.2

10/26/2005 HydroLab (ESR 202)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm Temp. °C Dissolved Oxygen % Specific Conductivity uS/cm Salinity ppt Total Dissolved Solids ppm Oxygen Reduction Potential mV
Below Hwy 26 Culvert 7.35 8.14 12.41 76.3 221 0.10 141 206
Wooded Area 7.42 7.92 12.48 74.0 223 0.11 143 220
East Side of Pool 7.36 8.71 13.87 84.6 229 0.11 148 190
Above Cornell Rd. 7.38 8.36 14.02 81.3 230 0.11 147 182
Wetland Outlet 7.64 8.65 14.19 84.6 225 0.11 144 230
Above Footbridge 7.54 4.02 14.94 40.6 169 0.07 108 141
Above BeaverDam 7.36 8.66 13.97 84.2 229 0.11 147 204
Storm Drain 7.31 6.44 15.16 64.4 206 0.10 132 230

10/26/2005 LaMotte Kit (ESR 202)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm (mg/L) Carbon Dioxide Concentration ppm (mg/L) Silicon Dioxide Concentration ppm (mg/L) Hardness ppm (mg/L) Nitrate ppm (mg/L) Phosphate ppm (mg/L)
Below Hwy 26 Culvert 6.0 7.4 8 18 80 <0.2 <0.2
Above Cornell Rd. 7.9 8.8 11 19 80 <0.2 <0.2
Wetland Outlet 7.0 3.4 15 18 64 <0.2 <0.2

Bronson Creek

05/04/2005 HydroLab (ESR 160)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm Temp. °C Dissolved Oxygen % Specific Conductivity uS/cm Salinity ppt Total Dissolved Solids ppm Oxygen Reduction Potential mV Turbidity
Storm Water Ret. Pond 8.40 9.24 15.13 91.7 34 0 21 254 9.5
Wetland Outlet 7.84 4.24 16.70 43.9 81 .03 52 169 7.5
Below Footbridge 9.56 8.17 15.10 81.9 166 .08 108 173 10
Wooded Area 7.53 7.94 14.20 77.6 184 .08 117 188 8.5

05/04/2005 LaMotte Kit (ESR 160)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm (mg/L) Carbon Dioxide Concentration ppm (mg/L) Silicon Dioxide Concentration ppm (mg/L) Hardness ppm (mg/L) Nitrate ppm (mg/L) Phosphate ppm (mg/L)
Storm Water Ret. Pond 8.1 9.5 4 .8 24 < .2 .7
Wetland Outlet 6.5 4.2 10 6 24 < .2 < .2
Below Footbridge 7.0 3.6 10 20 55 < .2 < .2
Wooded Area 7.0 10 10 10 108 < .2 < .2

10/25/2005 HydroLab (ESR 160)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm Temp. °C Dissolved Oxygen % Specific Conductivity uS/cm Salinity ppt Total Dissolved Solids ppm Oxygen Reduction Potential mV Turbidity
Storm Water Ret. Pond 7.50 9.20 11.16 89.0 44 .01 27 264 7.00
Wetland Outlet 7.45 9.00 10.71 81.0 28 0 18 253 5.75
Below Footbridge 7.59 7.93 11.20 72.0 97 .04 62 266 2.60
Wooded Area 7.79 8.40 11.25 77.5 102 .04 65 302 26.50

10/25/2005 LaMotte Kit (ESR 160)

Bronson Creek Location pH Dissolved Oxygen Concentration ppm (mg/L) Carbon Dioxide Concentration ppm (mg/L) Silicon Dioxide Concentration ppm (mg/L) Hardness ppm (mg/L) Nitrate ppm (mg/L) Phosphate ppm (mg/L)
Storm Water Ret. Pond 6.5 9.2 13.5 2.0 54 < .2 < .2
Wetland Outlet 6.5 7.2 13.0 2.0 65/50 < .2 < .2
Below Footbridge 6.5 8.6 15.0 14 90/165 < .2 < .2
Wooded Area 7.0 7.4 36.0 < .05 112 .2 .2