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Report Year: 2016
Ingham Lake, Emmet County
Summary Data Table
Parameter5/31/20167/18/20168/29/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)2.82.62.32.62.52.52.42.32.62.72.72.62.32.82.92.82.83.12.9
Thermocline Depth (m)Nil1.0NilN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.30.30.30.30.40.30.30.30.30.20.40.30.30.30.30.30.40.90.4
Temperature(oC)21.526.423.323.721.323.222.223.924.022.923.223.524.824.122.321.223.724.424.9
Dissolved Oxygen (mg/L)8.713.711.711.412.911.09.87.911.07.910.27.811.710.09.69.19.78.68.6
Dissolved Oxygen Saturation (%)99170137135.1144.9128.4111.093.7131.090.0119.692.4142.1118.1110.0101.7114.6102.4104.0
Specific Conductivity (μS/cm)420.0410.0400.0410.0500.0436.7433.3393.3353.3413.3433.3407.0428.0421.6461.5446.2545.0545.9446.3
Turbidity (NTU)51.122.019.730.923.931.438.150.148.626.323.236.256.583.378.367.441.735.852.2
Chlorophyll a (μg/L)155.7114.4147.2139.175.9132.9139.3198.3168.8100.044.374.253.1362.5135.931.086.072.460.5
Total Phosphorus as P (μg/L)129.7145.0147.4140.7126137169.3130.6154.9189.4145.2168158132161140100187-
SRP as P (μg/L)<2.8<2.8<2.8<2.84.716.3<14<10<11<8<9<1<1<12.3<1<1--
TKN (mg/L)4.343.093.523.652.962.594.935.092.132.38---------
Total Dissolved Solids (g/L)0.30.30.30.30.30.30.30.30.2----------
Total Nitrogen as N (mg/L)----------2.52.012.832.742.773.152.292.152.82
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)215.50<0.6<0.659<26<26142<14<145<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)29-5-1140116<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)0.26<0.07<0.0700.120.12<0.14<0.06<0.4<0.5-0.120.120.180.220.180.240.320.30
TN:TP ratio----------1713202119232313-
pH8.69.39.19.08.68.78.68.68.88.58.78.79.08.78.98.68.88.38.2
Alkalinity as CaCO3 (mg/L)10810810410713511911512612413114510313712412196134157156
Silica as Si (mg/L)-------------9.938.7610.478.76--
Dissolved Organic Carbon (mg/L)28.2027.4027.8527.8218.531312.2613<7.691213.9611.348.8019.5921.219.28--
Inorganic Suspended Solids (mg/L)139697155137899168171111483
Volatile Suspended Solids (mg/L)34374137262237463217253030303529251142
Total Suspended Solids (mg/L)474647473337425939263441483551402414126
Carlson Trophic State Index (Secchi)*80777678757978797783747878777978746175
Carlson Trophic State Index (Chl a)*80778079737979828176687370887964747371
Carlson Trophic State Index (TP)*747676757475787477807678777577757180-
*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