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Report Year: 2016
Union Grove Lake, Tama County
Summary Data Table
Parameter6/22/20168/11/20169/18/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)3.83.73.83.83.53.53.43.53.53.73.73.73.63.83.83.43.74.03.8
Thermocline Depth (m)2.5NilNilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)1.10.81.00.91.00.60.50.40.40.50.70.50.60.50.60.70.40.90.6
Temperature(oC)26.625.721.024.420.020.423.223.021.922.124.726.923.626.023.624.425.324.425.0
Dissolved Oxygen (mg/L)8.94.59.07.47.59.111.46.87.99.19.915.27.612.910.611.67.57.19.7
Dissolved Oxygen Saturation (%)1115510188.682.3101.1135.179.491.4105.6119.6190.189.6162.0125.8139.191.591.6118.3
Specific Conductivity (μS/cm)400.0400.0430.0410.0460.0393.3343.3343.3360.0395.0380.0344.5341.6375.2519.9419.2368.4330.7311.4
Turbidity (NTU)2.48.05.25.27.618.422.623.741.216.513.821.135.027.852.220.799.721.325.6
Chlorophyll a (μg/L)32.856.625.138.224.361.565.469.451.332.670.0103.378.9138.861.026.250.723.642.5
Total Phosphorus as P (μg/L)72.7144.272.996.64777135.5215.6186.7114.1103.9109151989866140105-
SRP as P (μg/L)<2.827.8<2.89.1<4.3<5.6<1458.151.38.811.41.334.1<14.11.527.4--
TKN (mg/L)1.351.261.221.271.121.351.541.801.841.44---------
Total Dissolved Solids (g/L)0.30.30.30.30.30.30.20.20.2----------
Total Nitrogen as N (mg/L)----------3.56.042.824.213.305.142.428.372.99
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)109.45<0.6397.7016711815274273204183<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)120191061112<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)2.36<0.071.2117.783.453023-4.821.283.122.054.241.556.581.77
TN:TP ratio----------391484549438821123-
pH8.38.18.18.28.18.38.68.38.38.17.99.08.78.58.78.58.68.57.9
Alkalinity as CaCO3 (mg/L)160177186174175156131145148178157132137148164116130147123
Silica as Si (mg/L)-------------4.365.622.844.47--
Dissolved Organic Carbon (mg/L)29.6442.1742.0737.962.88133.726<7.6<6.4<6.24.303.984.413.696.288.86--
Inorganic Suspended Solids (mg/L)4555511913141176891111141018
Volatile Suspended Solids (mg/L)568669121217<910911119810713
Total Suspended Solids (mg/L)9101311111921253219171520202019251631
Carlson Trophic State Index (Secchi)*59646061616769737369656966696764746268
Carlson Trophic State Index (Chl a)*65706266627172726965727673797163696267
Carlson Trophic State Index (TP)*667666706067758280727172777070647571-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/22/20168/11/20169/18/2016

Contact Limnology Laboratory, Iowa State University