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Report Year: 2016
Lower Pine Lake, Hardin County
Summary Data Table
Parameter6/6/20167/25/20169/9/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)3.64.74.14.14.44.54.43.94.54.54.64.74.94.24.74.04.04.24.6
Thermocline Depth (m)2.71.81.0N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)1.70.7-1.21.51.20.40.60.50.60.80.70.50.70.61.20.51.00.5
Temperature(oC)22.928.022.524.525.223.323.924.624.722.824.525.524.426.423.523.824.824.024.4
Dissolved Oxygen (mg/L)10.516.45.010.612.09.88.89.29.810.08.311.59.09.912.914.310.77.06.0
Dissolved Oxygen Saturation (%)12221057129.7146.0114.7105.5109.0118.0115.0100.2139.5110.6121.7151.8170.1129.788.771.4
Specific Conductivity (μS/cm)420.0300.0300.0340.0350.0346.7306.7350.0353.3380.0403.3352.2352.3366.7453.1378.1363.8332.6265.8
Turbidity (NTU)2.510.418.210.49.98.8127.111.016.010.36.411.57.320.044.313.435.116.434.4
Chlorophyll a (μg/L)8.558.780.049.173.658.833.980.452.831.329.744.570.5143.597.925.8112.632.012.6
Total Phosphorus as P (μg/L)33.463.9169.288.89975272.5253.0145.3128.2105.59417611312187174104-
SRP as P (μg/L)<2.8<2.8<2.8<2.8<4.3<5.693.260.915.78.3<9<15.0<11.61.33.6--
TKN (mg/L)0.851.571.991.471.361.661.601.951.671.30---------
Total Dissolved Solids (g/L)0.30.20.20.20.20.20.20.20.2----------
Total Nitrogen as N (mg/L)----------4.46.392.505.246.546.802.307.804.68
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)29.45<0.6<0.6<0.6376417044<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)4-16-1-431115<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)5.672.64<0.0734.123.704023-5.130.633.585.255.340.726.682.93
TN:TP ratio----------5967184961812085-
pH8.59.38.48.88.88.68.28.58.28.08.08.38.38.28.78.69.08.47.2
Alkalinity as CaCO3 (mg/L)15111914013713413211515414015215213714513313194128132129
Silica as Si (mg/L)-------------4.935.652.545.17--
Dissolved Organic Carbon (mg/L)28.7218.6831.5926.3311.1243.834<7.6<6.4<6.213.224.194.503.206.807.03--
Inorganic Suspended Solids (mg/L)324323396<565466485516
Volatile Suspended Solids (mg/L)4910888161210<9<8911111481667
Total Suspended Solids (mg/L)711141011115519121291318161716211222
Carlson Trophic State Index (Secchi)*5366-58545873687068646569666858726070
Carlson Trophic State Index (Chl a)*52717469737165747064646872797662776555
Carlson Trophic State Index (TP)*556478697066858476747170797273697971-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/6/20167/25/20169/9/2016

Contact Limnology Laboratory, Iowa State University