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Last updated: 10/18/2017
IMAGE - aqueducs
Saint-Lazare's aqueduct networks

Brown water? Low pressure?

It is possible that a pipe flushing operation is underway! Verify.

Which aqueduct network services my property?

View Saint-Lazare's aqueduct networks map to identify the network that provides your residence with potable water.

Controlling the quality of the water distributed by the municipal aqueduct network

As part of the routine operations of a treatment facility, several water quality tests are conducted each week in accordance with the Regulation respecting the quality of drinking water. The samples drawn at various points on the networks undergo a series of physico-chemical and bacteriological tests conducted in an independent laboratory accredited by the Ministry of Sustainable Development, Environment, Wildlife and Parks (MDDEFP). The results of all the water analyses are automatically sent to the MDDEFP without exception. This is a standard procedure that ensures that the strictest quality standards are met in the treatment and distribution of water.

RÉSEAU SADDLEBROOK

N.B.: a note has also been sent to property owners serviced by the Saint-Louis aqueduct network since the Saddlebrook and Saint-Louis networks are connected and those homes are most often supplied in drinking water by Saddlebrook.




The Town of Saint-Lazare is supplied with drinking water through various water tables with different quantitative and qualitative properties. Distribution is provided through three (3) water supply networks—specifically, the Sainte-Angélique, Saddlebrook and Saint-Louis networks. The Town’s water treatment plants have different equipment required for treating and disinfecting water depending on their various intrinsic characteristics.

The numerous random episodes of brown drinking water that occur in the Saddlebrook sector are not unusual situations in the exploitation of underground waters. Over the years, aquifers undergo natural transformations which can modify some of their characteristics, in particular the concentration of certain elements such as iron and manganese which confer water an unaesthetic brownish color. When such situations arise, protocols of intervention, validation and approvals exist and procedures apply to correct the situation. Unfortunately, every solution must be adapted to the particular situation which prolongs deadlines. Back in the early 90’s, the City has had to intervene in a similar situation on its Sainte-Angélique network. Already experienced in this field, the municipal team is making every effort to correct the situation in the best possible time frame while respecting steps prescribed by the law.
 



To rectify the brown water issue in your sector, the Town’s infrastructure department is notably working on 3 fronts:

Phase I – optimizing the cleaning of the water pipes : this phase, undertaken in 2014, aims at increasing the frequency of unidirectional water pipe flushing, it also includes other improvements such as the addition of valves and connectors to the network system;

Phase II – removing iron and manganese at the source (2017-2018 transitional measure): this phase involves removing iron and manganese at the source by increasing the filtration capacity. This measure requires the filtration system be modified and requires the confirmation from Ministère du Développement durable, de l’Environnement et de la Lutte contre les changements climatiques (MDDELCC) that the Town can proceed. After receiving, the green light from MDDELCC, on Wednesday, October 11, 2017, the Town will carry out the work needed to implement these particular modifications on the Saddlebrook network in the coming weeks. The work will considerably reduce the concentrations of iron and manganese and also improve the aesthetic quality of the water;

Phase III – the construction of a biological filtration system (permanent solution starting in 2019): a firm, specialised in water treatment solutions, has been running trials for at least 3 weeks to remove the iron and manganese as well as remove the nitrites and nitrates. The data and results collected from these trials will serve to draft and to proceed to calls for tender for the professional services to acquire and install a  permanent filtration system in 2019, a construction preliminarily estimated at 1 M $.


At the provincial level, iron and manganese are not subject to any standards in the Regulation respecting the quality of drinking water (RRQDW). In its Guide de conception des installations de production d'eau potable, the MDDELCC suggests a maximum concentration of 0.05 mg/L for manganese. The appearance of brown water is not an indication that manganese as reached its maximum concentration. Furthermore, since 2016, the Federal-Provincial-Territorial Committee on Drinking Water (CDW) as set a maximum acceptable manganese concentration (MAC) of 0.1 mg/L in order to protect the population that is generally more sensitive to potential neurological effects (infants) and to meet the aesthetic objective (AO) of 0.02 mg/L, which reduces complaints made by citizens concerning brown water.
Ville de Saint-Lazare © 2002-2018
1960, chemin Sainte-Angélique, Saint-Lazare (Québec), J7T 3A3
Telephone: 450 424-8000

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