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Report Year: 2016
Volga Lake, Fayette County
Summary Data Table
Parameter6/7/20167/26/20169/5/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)6.66.56.36.56.56.56.46.56.56.56.6--6.97.07.06.76.97.4
Thermocline Depth (m)3.83.73.9N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)1.00.30.40.60.60.70.80.61.20.60.8--1.00.80.40.94.32.4
Temperature(oC)22.125.622.023.224.122.322.523.723.522.324.4--25.723.223.025.723.823.9
Dissolved Oxygen (mg/L)11.311.06.69.610.59.412.19.710.79.611.4--9.614.310.612.213.18.3
Dissolved Oxygen Saturation (%)12913476112.9124.9108.2138.5113.3132.5111.8136.5--118.5168.3123.1151.5156.899.7
Specific Conductivity (μS/cm)420.0310.0330.0353.3326.7323.3333.3346.7346.7373.3340.0--335.0341.7309.2478.4369.8414.4
Turbidity (NTU)9.417.317.014.516.715.715.812.223.814.815.1--27.416.134.121.93.410.3
Chlorophyll a (μg/L)26.697.370.164.782.950.955.573.259.833.640.3--96.959.731.852.19.89.3
Total Phosphorus as P (μg/L)22.984.388.765.3735660.597.575.089.184.4--9678928425-
SRP as P (μg/L)<2.8<2.8<2.8<2.8<4.3<5.6<1410.8<11<8<9--5.0<11.2<1--
TKN (mg/L)0.911.481.781.391.412.041.421.462.431.50---------
Total Dissolved Solids (g/L)0.30.20.20.20.20.20.20.20.2----------
Total Nitrogen as N (mg/L)----------2.0--1.025.521.831.853.353.82
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)349.356.40307.70221<261522732337285<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)252332058<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)3.461.560.1821.542.774122---0.134.410.460.902.892.78
TN:TP ratio----------32--12732124222-
pH8.28.88.48.58.68.58.78.38.37.88.2--8.57.89.08.88.27.6
Alkalinity as CaCO3 (mg/L)160116131136124116121134136158140--1389377124116164
Silica as Si (mg/L)-------------3.982.472.075.06--
Dissolved Organic Carbon (mg/L)30.0426.0430.9429.0111.0643.615<7.6<6.4<6.2--4.5410.657.118.02--
Inorganic Suspended Solids (mg/L)35544447<58<4--496242
Volatile Suspended Solids (mg/L)7121091081199109--10913734
Total Suspended Solids (mg/L)1016151414121516131712--131819964
Carlson Trophic State Index (Secchi)*6076746869656466586963--606372623948
Carlson Trophic State Index (Chl a)*6376727274697073716567--757165695352
Carlson Trophic State Index (TP)*4968696466626370666968--7067696851-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/7/20167/26/20169/5/2016

Contact Limnology Laboratory, Iowa State University