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Report Year: 2016
Avenue of the Saints Lake, Bremer County
Summary Data Table
Parameter6/6/20167/25/20169/7/20162016201520142013201220112010200920072006200520042003200220012000
Lake Depth (m)4.15.94.04.73.35.05.22.94.36.25.1--5.66.34.33.75.05.2
Thermocline Depth (m)Nil4.22.0N/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/A
Secchi Disk Depth (m)0.50.60.60.50.40.50.60.40.50.40.5--0.40.41.20.60.70.6
Temperature(oC)22.026.624.324.325.122.924.024.125.323.125.4--25.522.623.324.324.123.6
Dissolved Oxygen (mg/L)8.48.08.58.312.68.09.57.58.87.78.9--8.910.19.99.98.410.3
Dissolved Oxygen Saturation (%)9510010198.8153.092.6115.288.0108.089.6108.8--108.4118.1117.2121.3108.8123.5
Specific Conductivity (μS/cm)260.0220.0220.0233.3203.3216.7206.7270.0226.7236.7256.7--224.8318.7275.3327.9196.7270.3
Turbidity (NTU)29.115.628.324.343.923.433.435.523.623.222.0--144.845.225.495.040.2164.5
Chlorophyll a (μg/L)34.046.682.654.4175.345.034.637.143.723.041.0--176.465.616.849.747.019.6
Total Phosphorus as P (μg/L)88.1123.5145.0118.9163295183.4150.6146.4151.0127.8--202363115122114-
SRP as P (μg/L)<2.8<2.8<2.8<2.8<4.3163.280.722.616.622.310.6--68.8192.823.19.1--
TKN (mg/L)1.231.502.581.773.382.101.672.112.331.24---------
Total Dissolved Solids (g/L)0.20.10.10.20.10.10.10.20.2----------
Total Nitrogen as N (mg/L)----------1.4--1.342.911.461.131.801.52
(Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L)<0.6<0.6307.0092<26163218248239<136<130--------
(Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L)0-4309-116<PRL<PQL<PQL<PQL<130--------
Nitrate + Nitrite (NO3 + NO2) as N (mg/L)<0.07<0.070.15<0.070.120.120<0.06<0.4<0.5---0.121.520.290.150.750.25
TN:TP ratio----------11--7813916-
pH7.98.48.38.29.78.89.08.28.88.28.5--8.88.98.28.28.46.9
Alkalinity as CaCO3 (mg/L)9289909060706588728494--90907410987116
Silica as Si (mg/L)-------------4.155.632.201.49--
Dissolved Organic Carbon (mg/L)22.0017.8727.9822.6212.1187.559877--8.816.6210.6510.21--
Inorganic Suspended Solids (mg/L)9510815881414146--611610812
Volatile Suspended Solids (mg/L)131014122211716111111--18178999
Total Suspended Solids (mg/L)2214242037191530242517--242714191720
Carlson Trophic State Index (Secchi)*7269697075716872717270--747358696668
Carlson Trophic State Index (Chl a)*6568747081686566686167--817258696860
Carlson Trophic State Index (TP)*6974767378867976767674--8189737372-
*Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions.
       
 
 
 
Water Column Profiles
6/6/20167/25/20169/7/2016

Contact Limnology Laboratory, Iowa State University