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Report Year: 2016
East Lake (Osceola), Clarke County
Summary Data Table
Parameter5/23/20167/11/20168/21/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)4.23.94.04.04.14.14.03.94.14.14.24.14.14.34.54.14.34.34.4
Thermocline Depth (m)2.31.72.4N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.90.50.50.60.50.70.40.50.50.60.60.80.60.30.40.30.40.50.4
Temperature(oC)19.227.426.124.221.424.523.724.925.626.023.926.524.024.722.823.525.123.124.7
Dissolved Oxygen (mg/L)11.49.09.710.010.010.510.811.017.011.39.212.54.611.410.69.97.17.99.5
Dissolved Oxygen Saturation (%)123113120118.7112.5127.9129.3135.2202.9139.8108.4156.753.9136.7123.4115.886.591.0116.0
Specific Conductivity (μS/cm)340.0280.0240.0286.7270.0236.7253.3270.0253.3316.7293.3275.2293.7288.9276.1264.4421.6233.2216.9
Turbidity (NTU)10.820.322.217.729.717.617.019.618.111.827.822.260.625.433.533.829.943.926.0
Chlorophyll a (μg/L)23.443.769.145.426.539.762.690.8101.530.445.350.443.5190.873.027.966.247.832.1
Total Phosphorus as P (μg/L)168.6272.7315.2252.2388324243.8239.0261.1278.0417.6489268272316282221384-
SRP as P (μg/L)26.0108.396.576.9207.494.994.017.756.4111.8255.5343.094.080.6146.997.736.1--
TKN (mg/L)0.901.982.401.761.602.102.302.442.840.64---------
Total Dissolved Solids (g/L)0.20.20.20.20.20.20.20.20.2----------
Total Nitrogen as N (mg/L)----------1.91.632.121.761.821.971.542.402.86
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)8.0597.40<0.62596<26115<14<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)120-753412<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)<0.07<0.07<0.07<0.070.640.12<0.14<0.06<0.4<0.5-0.170.120.220.180.300.130.390.15
TN:TP ratio----------53876876-
pH8.38.68.78.58.38.68.89.09.08.58.79.28.08.49.19.38.38.07.2
Alkalinity as CaCO3 (mg/L)15511510612511094951151171131351321051081107410599125
Silica as Si (mg/L)-------------4.775.315.025.81--
Dissolved Organic Carbon (mg/L)33.5932.4334.3833.4716.05108.269<7.6788.8111.548.6610.3815.3116.41--
Inorganic Suspended Solids (mg/L)36451436128487589127105
Volatile Suspended Solids (mg/L)61215111014111513<91212814131615115
Total Suspended Solids (mg/L)918201524171727221120181422222822229
Carlson Trophic State Index (Secchi)*62707067706674707169676468767275737274
Carlson Trophic State Index (Chl a)*62687268636771757664686968827363726965
Carlson Trophic State Index (TP)*788587849088838384859193858587868290-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
5/23/20167/11/20168/21/2016

Contact Limnology Laboratory, Iowa State University