The Annual Review of the quality of drinking water as reported in September exceeded microbiological standards for the period from 1 st January to 31 December 2015. Three were reported to the urban distribution network Rouyn-Noranda, which serves 31,120 people, while the other four were recorded in the district Évain, where 2516 people are supplied by the network.
the affected sectors were the 2190 Saguenay Street (April 15) and 580 Murdoch Avenue (22 June and 19 August) for Rouyn-Noranda and 71 Victor Street (July 27), 41 rue Évain (August 10), 43 rue Marcotte (18 August) and 2655 boulevard Rideau (18 August) for Évain.
No health risk
This was atypical colonies of potential contamination with faecal coliforms, but not in sufficient concentration to declare the presence of these contaminants. Moreover, no report has represented a risk to human health. And in all cases, a simple rinsing of the pipes sector has corrected the problem.
“For the Murdoch Avenue overruns were noted during the work that had required the installation of temporary lines. At Évain, atypical colonies are most evident during the summer, when the water is warmer. As this water comes from a well, it is not treated with chlorine, which helps eliminate atypical colonies, “said Daniel Paquette, technical coordinator of drinking water filtration plant in Rouyn-Noranda.
a little cloudy water
the urban network of Rouyn-Noranda has also been affected by exceeding turbidity, a standard that assesses the clarity of ‘water. The event occurred on April 8 in the area of 606 Avenue Laliberté.
“We always take random samples, Mr. Paquette said. But when we sampled this area, we had just to make unidirectional flushing. It had recovered from the particles in water. It was, somehow, shot in the foot. It was enough to rinse pipes again to solve the problem. “
Water acid Cadillac
The Cadillac area, where 775 people are served by the local distribution network, for its part, was the scene of two overruns inorganic substances, September 10, at 42 rue de Cadillac and 9500 Larivière Avenue. These events had the effect of slightly increasing the acidity of the water.
“In this sector, we must deal with several mining relics that have had the effect of acidifying the rock. Is then used polyphosphates, anti-corrosion treatment to neutralize the acidity of the water and control its iron level. But it’s still a difficult problem to control. The good news is that in 2016, the City will perform an engineering study that finally arrives to adjust to standards “, said Daniel Paquette.
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