Normal View    Print View

    

Report Year: 2016
Mill Creek Lake, O'Brien County
Summary Data Table
Parameter5/31/20167/20/20168/28/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)4.34.54.14.34.34.34.44.34.34.54.5-4.54.44.64.34.44.74.5
Thermocline Depth (m)3.02.23.1N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)3.70.50.71.61.21.32.20.91.90.81.4-4.51.11.71.60.71.90.8
Temperature(oC)22.426.222.823.821.823.024.324.124.724.223.8-17.723.722.921.821.523.026.0
Dissolved Oxygen (mg/L)10.812.57.210.211.38.610.010.811.67.713.0-11.89.39.58.98.96.810.1
Dissolved Oxygen Saturation (%)12415584120.9129.2100.9120.7128.9141.691.4153.8-123.5109.4112.499.297.973.4125.5
Specific Conductivity (μS/cm)520.0380.0410.0436.7400.0413.3386.7416.7436.7416.7440.0-494.7496.7500.4496.4470.4476.9576.1
Turbidity (NTU)0.817.73.67.312.97.03.111.612.65.53.5-4.311.38.08.424.415.423.8
Chlorophyll a (μg/L)2.663.247.337.734.122.654.533.324.022.46.7-1.526.310.213.248.622.516.2
Total Phosphorus as P (μg/L)14.271.945.243.7594379.662.644.754.933.9-125344526655-
SRP as P (μg/L)<2.8<2.8<2.8<2.8<4.3<5.6<14<10-<8<9-<1<1<11.1<1--
TKN (mg/L)0.891.531.341.251.081.091.411.431.49<0.5---------
Total Dissolved Solids (g/L)0.30.30.30.30.30.30.30.30.3----------
Total Nitrogen as N (mg/L)----------0.9-3.141.612.102.102.162.331.25
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)57.20<0.613.9021<2634147<14<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)4-421-22<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)2.35<0.07<0.0710.410.12001<0.5--2.610.931.401.260.951.610.40
TN:TP ratio----------28-2683450433699-
pH8.39.38.58.79.08.48.68.78.68.48.6-8.48.48.68.28.48.38.2
Alkalinity as CaCO3 (mg/L)184139167163140141130147158155167-176188180140159129167
Silica as Si (mg/L)-------------2.011.411.131.89--
Dissolved Organic Carbon (mg/L)36.8128.7637.5634.3814.1166.547<7.6<6.4<6.2-4.495.864.157.818.91--
Inorganic Suspended Solids (mg/L)22<0.81<1.4<2.1<3.22<5<4<4-1575435
Volatile Suspended Solids (mg/L)<1169996510<8<98-174412510
Total Suspended Solids (mg/L)318910107612101010-212111011814
Carlson Trophic State Index (Secchi)*4170665358564961516455-38595253645163
Carlson Trophic State Index (Chl a)*4071686665617065626149-35635356696158
Carlson Trophic State Index (TP)*4266595963596764596255-406159616462-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
5/31/20167/20/20168/28/2016

Contact Limnology Laboratory, Iowa State University