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Report Year: 2016
Trumbull Lake, Clay County
Summary Data Table
Parameter5/31/20167/18/20168/29/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)1.31.20.71.11.11.0-0.71.11.11.10.91.01.21.21.21.21.21.2
Thermocline Depth (m)NilNilNilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)1.10.70.70.80.70.4-0.10.30.20.30.20.20.10.20.20.10.30.2
Temperature(oC)21.123.925.223.420.622.7-19.024.624.221.722.923.221.522.121.219.525.923.5
Dissolved Oxygen (mg/L)11.512.110.811.515.612.4-9.811.511.39.310.19.69.19.312.58.113.69.2
Dissolved Oxygen Saturation (%)129143131134.6171.6144.4-105.6137.7135.0103.0117.8112.2101.7106.1141.587.5165.6107.5
Specific Conductivity (μS/cm)570.0460.0460.0496.7443.3395.0-500.0390.0406.7403.3373.9428.3498.6437.5461.1468.0453.8383.0
Turbidity (NTU)7.910.37.68.611.821.6-218.486.5141.082.165.7191.9163.8351.371.8933.9137.6880.8
Chlorophyll a (μg/L)21.654.225.833.958.098.8-70.086.976.329.7137.2120.6144.792.524.4182.9121.7196.0
Total Phosphorus as P (μg/L)40.2106.0127.191.1164281-253.8235.7170.6160.5234248159153147460271-
SRP as P (μg/L)<2.8<2.820.16.337.473.0-<1015.7<8<9<129.215.37.11.927.4--
TKN (mg/L)1.271.511.301.361.892.30-4.310.992.48---------
Total Dissolved Solids (g/L)0.40.30.30.30.30.3-0.30.3----------
Total Nitrogen as N (mg/L)----------1.44.272.943.982.914.925.066.153.47
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)<0.6<0.6<0.6<0.6<2637-<14<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)-10-5-2-13-<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)8.881.13<0.0731.430.12-831-1.770.922.881.393.632.444.290.64
TN:TP ratio----------820123221371236-
pH8.28.78.58.58.88.7-8.48.68.58.58.78.28.38.78.68.38.58.4
Alkalinity as CaCO3 (mg/L)208192211204171175-186159176182159201227160127219176146
Silica as Si (mg/L)-------------8.853.136.3916.31--
Dissolved Organic Carbon (mg/L)42.9243.1150.2045.4120.7911-5<7.6<6.4716.527.536.257.379.5815.25--
Inorganic Suspended Solids (mg/L)7123611-362139383055638344321787656
Volatile Suspended Solids (mg/L)411981019-803618133419222016412627
Total Suspended Solids (mg/L)111211111630-44217556438982106634921810283
Carlson Trophic State Index (Secchi)*596666636674-937884798384938180957787
Carlson Trophic State Index (Chl a)*617062657076-727473647978797562827882
Carlson Trophic State Index (TP)*577174697885-8483787783847777769385-
*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