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Report Year: 2016
Lake Meyer, Winneshiek County
Summary Data Table
Parameter6/7/20167/26/20169/5/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)7.27.27.07.16.47.27.27.37.47.47.5--7.47.77.77.97.38.1
Thermocline Depth (m)3.34.21.5N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)4.00.50.61.72.91.90.81.51.82.00.8--0.61.00.71.72.20.7
Temperature(oC)21.823.121.622.221.922.222.023.525.623.123.6--26.523.222.823.922.222.9
Dissolved Oxygen (mg/L)11.718.117.915.912.411.612.010.011.48.213.0--13.210.89.111.212.111.2
Dissolved Oxygen Saturation (%)133212203182.6141.3132.9137.4117.1142.897.4153.3--165.0126.9103.7136.9140.2130.6
Specific Conductivity (μS/cm)560.0420.0310.0430.0510.0403.3410.0450.0480.0456.7420.0--413.8385.9417.8486.8378.5431.2
Turbidity (NTU)<0.342.89.617.31.710.211.819.05.32.313.5--23.514.328.519.222.122.9
Chlorophyll a (μg/L)3.084.8153.680.511.742.738.941.817.818.339.0--213.939.127.913.430.719.2
Total Phosphorus as P (μg/L)<10.8202.8332.0181.32972111.266.240.663.772.0--731281076569-
SRP as P (μg/L)<2.8<2.881.323.5<4.3<5.648.7<10<11<8<9--<142.732.1<1--
TKN (mg/L)0.601.742.131.490.922.101.411.080.822.22---------
Total Dissolved Solids (g/L)0.40.30.20.30.30.30.30.30.3----------
Total Nitrogen as N (mg/L)----------1.8--1.582.944.001.252.292.63
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)271.40<0.6<0.680<266841<14<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)21-4-25210<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)3.541.230.6322.761.834111---0.332.322.710.471.231.07
TN:TP ratio----------26--2525312666-
pH8.38.59.38.78.58.78.38.48.48.08.5--8.98.58.78.68.77.1
Alkalinity as CaCO3 (mg/L)200145139161187149151148151167149--151146107159138183
Silica as Si (mg/L)-------------4.514.074.152.89--
Dissolved Organic Carbon (mg/L)36.9633.1130.8333.634.3644.145<7.6<6.4<6.2--6.854.428.848.82--
Inorganic Suspended Solids (mg/L)<0.87442<2.15<2<5<4<4--264714
Volatile Suspended Solids (mg/L)<1121492978<8<910--14611742
Total Suspended Solids (mg/L)21918134111296713--1612151055
Carlson Trophic State Index (Secchi)*4070695345516354515063--686165524965
Carlson Trophic State Index (Chl a)*4174807455676767595967--836763566460
Carlson Trophic State Index (TP)*3681887953667265586466--6674726465-
*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