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Report Year: 2016
Lake Smith, Kossuth County
Summary Data Table
Parameter5/31/20167/18/20168/29/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)3.12.82.52.82.92.82.92.52.92.92.9--3.13.33.33.13.13.0
Thermocline Depth (m)NilNil1.3N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.71.70.61.01.20.60.80.80.71.40.6--0.81.62.91.71.10.4
Temperature(oC)20.924.323.122.820.822.621.524.023.323.223.0--23.622.320.921.023.224.3
Dissolved Oxygen (mg/L)9.210.010.39.810.18.89.16.410.111.113.3--10.58.813.17.610.513.6
Dissolved Oxygen Saturation (%)103119120114.3114.5102.0102.774.3120.1131.7151.8--121.6103.2148.783.1122.8168.6
Specific Conductivity (μS/cm)490.0350.0330.0390.0460.0356.7420.0370.0393.3370.0346.7--476.1457.4465.8477.3515.4492.3
Turbidity (NTU)1.94.426.110.84.516.110.96.313.04.610.6--131.08.43.512.115.246.8
Chlorophyll a (μg/L)5.725.296.642.538.6115.454.148.252.417.142.0--109.932.013.828.033.141.4
Total Phosphorus as P (μg/L)42.650.8130.274.5117268260.9115.194.985.5234.1--139132149267121-
SRP as P (μg/L)<2.8<2.8<2.8<2.844.2137.7130.128.4<11<829.2--<145.172.0178.5--
TKN (mg/L)1.461.232.201.631.702.052.252.57<0.5<0.26---------
Total Dissolved Solids (g/L)0.30.20.20.30.30.20.30.20.3----------
Total Nitrogen as N (mg/L)----------1.7--8.634.738.771.579.292.43
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)77.1543.45<0.63261827417<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)826-17563<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)9.193.24<0.0743.860.686073---6.653.146.870.227.930.62
TN:TP ratio----------7--8656921192-
pH8.49.49.69.28.58.28.48.88.88.79.0--8.58.59.48.48.38.0
Alkalinity as CaCO3 (mg/L)154115123131166137138137141121140--158128110151146145
Silica as Si (mg/L)-------------4.284.722.6812.26--
Dissolved Organic Carbon (mg/L)33.7525.7426.9028.8017.1288.7911<7.679--8.6815.1413.3513.91--
Inorganic Suspended Solids (mg/L)21416246<2<5<4<4--3234740
Volatile Suspended Solids (mg/L)251996998<8<915--8534512
Total Suspended Solids (mg/L)419201581414991019--117681152
Carlson Trophic State Index (Secchi)*6552696057686463655567--645345535975
Carlson Trophic State Index (Chl a)*4862756766777069695867--776556636567
Carlson Trophic State Index (TP)*5861746673858473706883--7575768573-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
5/31/20167/18/20168/29/2016

Contact Limnology Laboratory, Iowa State University