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LAC NOTRE DAME
Link # on MapMilfoil Water levelsClarity testLocation 1LND IN 1Tributaire ILoc 2LND IN 2Tributaire IILoc 3LND OUT-3Loc 4
LND IN 4 Criminal Creek
Loc 5
LND MIDDLE 5 - Centre Lac
Loc 6
LND LOW Cottages at Generation
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LND IN 7 Domaine discontinued
9A
LND IN North A
9B
LND IN North B
13
LND Island North
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LND Island South
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YearDateSeverity of matsWater level if trackedSecchi in meters between loc 9 & 13E-coli CFU/100 mlNitrogen Total Kjedahl
Phosphorus /.005
E-coliNitrogen
Phosphorus /.005
E-coliNitrogenPhosphatesE-coliNitrogenPhosphatesE-coliNitrogenPhosphatesE-coliNitrogenPhosphatesE-coliNitrogenPhosphatesE-coliNitrogenPhosphatesE-coliNitrogenPhosphatesE-coliNitrogen
Phosphorus /.005
E-coliNitrogen
Phosphorus /.005
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200415-Sep-2004Large mats100.038100.016100.00910.009
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20054-Jul-200520.00820.00740.00820.00720.00620.007
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8-Aug-2005Large mats20.005200.00720.00420.00520.006100.00720.005
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29-Aug-2005Cover surface1010102
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200611-Aug-2006Large mats1380.024320.011300.1240.11120.012260.014
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20-Nov-2006180.320.008120.20.00530.190.00620.270.00720.210.00660.150.008
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200718-Jul-2007Mats560.00920.00620.006
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20081-Jul-2008Mats30.0071400.01720.007210.00720.00720.007310.00220.002
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7-Jul-200850.008210.01550.002520.03310.00310.006
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27-Aug-200810.0061440.01810.0092210.00610.003260.005
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20095-Jun-2009Decrease00.00540.00700.00830.00500.00800.00200.004
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201431-Jul-2014Continued decrease5.6<10/100.260.007<10/100.260.007
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13-Oct-2014Oct 13: 720.270.00620.330.008<20.008<20.320.00720.290.007<20.330.008<20.30.007
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20155-Jul-201540.270.007<20.280.00740.270.00580.390.01<20.330.00820.230.00520.230.006<20.320.005<20.22<.005
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20166-Jul-2016<50.260.005<50.250.005<50.270.006<50.280.00650.420.014<50.24<0.00550.24<0.005<50.39<0.005<50.24<0.005
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201721-Aug-2017Low milfoil - no buoys til JulyHigh3.75<40.240.00640.260.006<40.22<.005<40.370.017
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201813-Aug-2018No mats at surface - buoys placed in early JulyHighAug 3: 4.7
Aug 12: 5.0
<100.270.005<100.310.006100.310.005<100.250.005<100.280.0063700.390.009100.290.006400.270.006<100.270.005<100.280.005<100.26<.005
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201817-Aug-2018No mats, lowHigh
Special sample collection at Loc 6 plus 5 additional points along Generations & Symons - e-coli for all at 10 or below
100.050.005100.220.005
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201911-Aug-2019No mats - buoys not placed - very low milfoilHigh - photosAug 2: 4.75300.220.006<100.240.007<100.220.006100.250.007100.310.012100.250.007100.260.007200.20.005<100.220.005100.260.006
*E Coli RDL 10
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202010-Aug-2020Milfoil up - buoys out first week of AugustHigh then drop then rain -photosAug 7:4.4 (3 days after 5 cm rain)<40.23<0.005120.26<0.005160.260.00640.260.005
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26August:16
0.290.007160.240.00640.23<0.00540.24<0.005<40.25<0.005Not avail0.23<0.005
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202103-Aug-2021Milfoil up - new yellow buoys out mid July, seed heads in shallowsIce out April 8 - high water levels May through Sept - beavers at outletLow - high algae and sediment in July (heavy rains) & August (drier)
Sep 4: 4.25 (low for September!)
<100.270.009<100.260.009<100.270.009<100.260.009<100.250.008<100.290.011<100.260.01100.260.009<100.250.009<100.260.01<100.330.01
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202216-Aug-2022Milfoil average - buoys out in July, seed heads in early AugustIce out April 18 - high in May then way down (dam cleared at outlet) - lower in July than last few years - high in midAugust much rainGood clarity Secchi August 13: 4.9m (before rain)<100.250.005100.260.005100.280.005500.260.005<100.260.0050.280.005100.270.005<100.280.006<100.260.005
Stopped testing at 13 and 14
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Scroll sideways for all locations...
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MeasuresUnits
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Total e-coliCFU/100ml
Quebec requires that E Coli should be less than 10 CFU per 100ml for drinking water - below 100 CFU for swimming (mean of at least 5 samples)
RSVL guide
Reporting detection limit seems to vary between 4 and 10 CFU/100 ml
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Total Kjeldahl Nitrogen
mg/l
Target levels for nitrogen (total kjedahl nitrogen TKNTP in drinking water are 0.02 mg/L. The reporting detection limit (RDL) is 0.05
The reporting detection limit (RDL) is 0.05
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Total Phosphorusmg/l
Target levels for Phosphorus in an uncontaminated lake are below .01 mg/L. RDL is .005
RDL .005
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Water clarity
Secchi measurement of water clarity target is above 5 meters for Oligotrophe (above 4 for Oligo-mesotrophe)
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Phosphorus
0.01 - 0.03 mg/L - the level in uncontaminated lakes
https://water-research.net/index.php/phosphates
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0.025 - 0.1 mg/L - level at which plant growth (including algae) is stimulated
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0.1 mg/L - maximum acceptable to avoid accelerated eutrophication
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