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Report Year: 2016
Lake Anita, Cass County
Summary Data Table
Parameter6/14/20168/2/20169/11/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)9.29.38.89.18.89.19.59.38.89.49.68.87.3--8.98.68.08.5
Thermocline Depth (m)3.04.77.2N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)1.80.50.71.01.20.60.90.71.10.61.01.00.9--1.40.81.00.9
Temperature(oC)27.725.722.825.423.322.323.923.724.824.723.725.224.9--23.325.223.325.3
Dissolved Oxygen (mg/L)8.87.64.97.18.09.79.37.37.39.213.011.67.2--8.09.68.28.8
Dissolved Oxygen Saturation (%)111935787.093.9110.7109.886.390.2112.0155.2140.386.3--93.7120.690.9106.7
Specific Conductivity (μS/cm)250.0240.0260.0250.0253.3253.3276.7276.7263.3260.0260.0297.8329.6--286.0289.7243.9274.0
Turbidity (NTU)12.717.711.714.012.316.111.39.912.612.912.516.211.8--17.120.025.814.2
Chlorophyll a (μg/L)23.380.036.446.648.174.243.447.239.236.928.348.638.3--18.855.158.017.2
Total Phosphorus as P (μg/L)40.999.094.578.1729258.289.568.462.156.96755--676149-
SRP as P (μg/L)<2.8<2.85.5<2.8<4.3<5.6<14<10<11<8<9<1<1--1.91.3--
TKN (mg/L)<0.51.511.331.101.191.921.221.310.820.89---------
Total Dissolved Solids (g/L)0.20.20.20.20.20.20.20.20.2----------
Total Nitrogen as N (mg/L)----------0.90.781.54--1.201.161.381.12
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)286.408.15335.602101084717353<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)431172015428<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)<0.07<0.07<0.07<0.070.120.12<0.14<0.06<0.4<0.5-0.120.38--0.120.120.150.31
TN:TP ratio----------141332--191933-
pH8.48.38.18.28.58.58.58.38.47.98.48.78.5--8.48.38.17.8
Alkalinity as CaCO3 (mg/L)1039911010410299103102104110108120116--83106107120
Silica as Si (mg/L)---------------1.081.62--
Dissolved Organic Carbon (mg/L)20.0924.3127.7424.0511.8865.615<7.6<6.4<6.26.817.36--9.679.47--
Inorganic Suspended Solids (mg/L)233335<3.2<2<5<4<424--63712
Volatile Suspended Solids (mg/L)3106678699<9986--81068
Total Suspended Solids (mg/L)513991013810109121010--14141313
Carlson Trophic State Index (Secchi)*52696660586761655867606161--55636062
Carlson Trophic State Index (Chl a)*61746668697368686766636966--59707059
Carlson Trophic State Index (TP)*58707067666963696564626562--656360-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/14/20168/2/20169/11/2016

Contact Limnology Laboratory, Iowa State University