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Report Year: 2016
Blue Lake, Monona County
Summary Data Table
Parameter5/18/20166/28/20168/17/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)3.12.82.52.82.72.32.22.62.82.92.52.72.23.53.02.73.43.13.0
Thermocline Depth (m)1.3NilNilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.80.60.50.60.60.50.60.60.70.90.51.40.30.40.40.30.40.50.4
Temperature(oC)16.527.227.123.620.423.423.323.322.224.324.426.026.324.422.525.926.322.526.6
Dissolved Oxygen (mg/L)10.98.311.810.38.69.19.28.69.99.88.49.09.28.310.68.68.211.111.3
Dissolved Oxygen Saturation (%)112105148121.596.1106.6108.4101.4113.2117.1100.2110.9113.799.5122.3102.6103.6124.2140.7
Specific Conductivity (μS/cm)610.0640.0620.0623.3663.3576.7703.3680.0656.7683.3680.0627.3740.3750.1656.8684.1707.1600.1767.0
Turbidity (NTU)7.8-16.312.113.413.918.620.613.912.355.06.930.736.537.630.930.132.426.4
Chlorophyll a (μg/L)6.032.154.730.921.837.934.438.825.630.525.714.243.780.644.317.531.435.239.3
Total Phosphorus as P (μg/L)30.791.377.866.68011693.261.558.685.285.26611276898576124-
SRP as P (μg/L)<2.8<2.8<2.8<2.8<4.3<5.6<14<10<11<8<97.02.41.53.13.96.0--
TKN (mg/L)<0.220.921.230.721.211.521.171.541.301.07---------
Total Dissolved Solids (g/L)0.40.40.40.40.40.40.50.40.4----------
Total Nitrogen as N (mg/L)----------1.90.961.290.971.050.930.901.201.25
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)65.05239.25<0.696214288163<14<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)234-311123817<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)0.52<0.07<0.0700.120.12<0.14<0.06<0.4<0.5-0.120.120.120.120.120.120.120.12
TN:TP ratio----------1916131312111211-
pH7.98.48.68.38.38.58.48.58.48.38.48.68.48.48.58.48.48.27.9
Alkalinity as CaCO3 (mg/L)255273239256272237290292290276289260304296245194286225298
Silica as Si (mg/L)-------------7.967.125.924.46--
Dissolved Organic Carbon (mg/L)52.5849.1256.6952.8024.9376.408<7.6686.107.284.365.909.689.32--
Inorganic Suspended Solids (mg/L)<0.82110101314211691114424182222182021
Volatile Suspended Solids (mg/L)<191176913911<912524171811101411
Total Suspended Solids (mg/L)<0.830211719233425191925949354033283431
Carlson Trophic State Index (Secchi)*63676966666967686461705576727376736972
Carlson Trophic State Index (Chl a)*48657064616665666264625768746859646667
Carlson Trophic State Index (TP)*546967656773706463686865726769686774-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
5/18/20166/28/20168/17/2016

Contact Limnology Laboratory, Iowa State University