Some of you might have wondered why I did not publish the lake results last spring as I have done in the previous years. Answer is simple: I did not get them till the end of June. Why?
The lab at the Environment Department hit a snag last summer. The equipment measuring the phosphorus content broke down. By the time it was replaced, the third water samples were out of date. The rest is bureaucratic snafu!
Look at this 2016 Black Lake chart as an example. Click to enlarge it. The first and second phosphorus readings are 2.5 and 2.0 micro grams per litre. Excellent numbers. The third one is 0.6. Implausible!
The third column on the chart is dissolved organic carbon. This measures water coloration, in Black, it is evidently higher than in other lakes. Hence it’s name.
I have been told by the RSVL Team in Quebec City that we can really trust the first two numbers as well as those of the previous years. And now the lab has new equipment to measure phosphorus.
Let us have a look at another chart. That of Curran Lake (below).
Again, very good numbers here 1.5 and 3.0 , except for the third one (1.) that was rejected. The spread is not enormous. I saw the chart of a lake (Manitou) where it went from 1.4 to 6.9! You will also notice that transparency is much higher than in Black. Transparency champion is always Clear. Evidently!
We have ten years of data and there is great value in numbers. We have enough data to establish trends and ours is in the right direction.
You will find all the charts – 2016 and multiyear – here.
This year, we will be taking water samples in late July and August.
But remember: lakes are our main asset. Let them deteriorate and our properties could lose half of their value. That is why we insist that municipalities make sure all septic systems are in order, make sure that shoreline protection bands are there to prevent nutrients from reaching the lake. That is why we ban pesticides and fertilizers close to the lake. That is also why we insist that you wash your boats to prevent the arrival of invasive and exotic plants and molluscs that can literally kill a lake.
Sorry about the sermon! I know you will forgive me.