A conventional septic system is composed of a septic tank and a leaching bed. A septic system treats your sewage right in your own yard and releases the treated effluent back into the groundwater.
The Municipality of Chelsea, as part of its septic tank emptying program, empties and inspects all the residential septic tanks on its territory once every two years.
When you receive a notice at your door mentioning the week your septic tank will be pumped out, you must prepare the septic tank and if the lids are buried, you must uncover the two original septic tank lids and sewage pump, if applicable.
Please note that if your septic system consists of a grey water tank and a holding tank, both will be emptied. We will not pump septic tanks with extension pipes.
A municipal employee will accompany the contractor when inspecting your system and will hand you an inspection report.
Start : May 17, 2021
End : October 22, 2021
Delay Recovery: Week of October 25 to 29, 2021
In order to have an approximate idea of when your septic tank will be emptied, we invite you to consult the itinerary.
We are committed to the health and social distancing measures that governments are putting in place in response to the evolving situation of COVID-19. For this reason, the Municipality would like to advise you of the main instructions to be followed when our teams empty your septic tank.
At all times, you must :
In the event of non-compliance with the issued measures:
*Due to frequent travel and handling of equipment, we ask for a distance of three meters to ensure a safety margin at all times.
For more information on the septic tank emptying program, please contact the Public Works Department at 819-827-1160.
You must apply for a permit before any work can begin for the installation of a septic tank on the territory of the Municipality of Chelsea. This is required for the construction of a complete septic system and for any partial work such as the installation of a holding tank, replacement of a septic tank and corrective measures for an existing leaching field.
Your application must include the permit application form for a septic system and two copies of an expert report (engineer or qualified technologist who is a member of a recognized professional order in Quebec).
Distances must comply with the Ministère de l’Environnement’s Q-2, r.22 Regulation respecting waste water disposal system for isolated dwellings and Environment Quality Act.
You must complete the application form, Request for Information on a Septic Installation and drop it off at the Municipality’s reception desk along with a payment of $50 payable by check, debit or cash. The owner's signature is required except in cases where a notary was commissioned and making the request. In this case, the notary’s office will be charged. The letter sets out information available on file about your septic system and the results of the last inspection made under the Septic Tank Emptying Program offered by the Municipality. It should be noted that the inspection carried out under this Program is a visual inspection only.
We understand that these types of letters are required rapidly in real estate transactions, nevertheless, please allow 10 business days for the issuance of this document.
We recommend you have it inspected by a consultant specialized in sanitary engineering. We would like to point out that the Municipality of Chelsea cannot guarantee the compliance, longevity and proper functioning of the septic system.
We ask that you send your request by email. A delay of approximately 10 business days should be expected to process the request.
In Chelsea, various types of septic systems may be installed on the territory depending on the topography, land dimensions and soil composition.
Sometimes, conventional systems and advanced secondary systems cannot be installed because:
In such a case, the Ministère de l’environnement et de la lutte contre les changements climatiques du Québec (MELCC) allows systems with a tertiary treatment. The most common tertiary system is the treatment procedure with an Ecoflo® Biofilter and an FDi disinfection filter. Some systems with the Roseau épurateur also fall into this category.
In Chelsea, strict environmental monitoring of septic systems with tertiary treatments that release waste water into the environment is ensured by the municipality to comply with prevailing regulations. These regulations set out the sampling calendar, pricing and environmental standards that must be respected.
Sampling and analysis fees may be integrated with the property taxes on a building. The municipality ensures compliance with the provincial Q-2, r. 22 Regulation respecting waste water disposal systems for isolated dwellings where environmental standards are out of line and initiates procedures with residents, if required (stopping use, repairs, etc.).
A third-party company is commissioned by the municipality to sample the effluent from these systems according to a sampling calendar established in By-law No. 768-10 (link) and the provincial compliance level for fecal coliforms is 200 UFC/100 ml at the point of sampling.
The level is over the limit if the concentration in two samples taken within a 60-day period exceed the provincial standard (fecal coliforms: 200 UFC/100 ml).
If the discharge standards are exceeded, the owner must temporarily seal the septic tank and seek the advice of his or her consultant to correct the system within the time frame established by the officer in charge.
In addition, when the discharge standards are exceeded, the sampling calendar will be downgraded to year 1.
For questions regarding this type of septic system, please contact the Sustainable Development Advisor at email@example.com.
Bylaw (1155-20) recognize tertiary treatment systems with UV disinfection as acceptable for the replacement of existing septic systems.
This solution is necessary for properties on which a septic tank is the only option. Holding tanks receive the wastewater from sinks, showers, and toilets and need to be emptied frequently, sometimes every two weeks.
This system is only to be used as a last resort, once it has been demonstrated that no other wastewater treatment mechanism or system can be installed on the property.
A tertiary septic system is a system that uses a UV lamp to treat wastewater from an advanced secondary treatment system. The wastewater goes into the septic tank, passes through the advanced secondary treatment system (e.g., Bionest, Enviro, Septic, Ecoflo), is treated by UV lamp, and is discharged into the environment.
1. Septic tank equipped with a primary filter. The wastewater goes to a septic tank where solids are separated from the liquid.
2. Ecoflo Biofilter. Treats water coming from the septic tank.
3. Pumping station. Integrated in Ecoflo’s polyethylene and concrete models.
4. Self-cleaning DiUV unit. Water moves at a constant, controlled speed in a quartz sleeve to optimize the exposure of pathogens to UV rays and ensure maximum deactivation.
5. Discharge of treated water. Treated water is discharged in accordance with Bylaw Q-2, r.22.
In accordance with the requirements of provincial by-law Q-2, r.22, Regulation respecting wastewater disposal systems for isolated dwellings, maintenance of tertiary treatment systems with ultraviolet radiation disinfection is carried out by the Municipality.
The Municipality therefore signs a contract with the company authorized to carry out maintenance on the system, and that company performs the maintenance and inspection.
The maintenance contract is charged to the Municipality by the company. The fees are then added to the annual tax bill for the property. The fees are considered a property tax.
This system uses a UV lamp to treat wastewater. When the bulb burns out and/or isn’t working, an alarm goes off in the owner’s home. If the alarm is ignored, the environmental risk goes up since discharged water won’t have been treated.
Since the Municipality doesn’t have any control over such situations, it limits the use of these system to “last resort” situations to reduce any environmental risk.
The septic tank retains the solid portion of household wastewater and begins its decomposition. Heavier solids settle out of the wastewater and accumulate on the bottom of the septic tank as sludge. Lighter solids float to the surface and accumulate as scum.
Liquid wastewater leaving the septic tank is directed towards the leaching bed. Wastewater is filtered through the ground and treated naturally by the decomposing action of bacteria and micro-organisms living underground.
Over time, the sludge will build up in the bottom of the septic tank. If the sludge is allowed to accumulate it will eventually flow into the leaching bed and rapidly clog the distribution pipes. Once the pipes become clogged, the wastewater will either seep to the surface of the ground or worse yet, back up into your house. Not only can a clogged septic system be hazardous to the environment and to your family’s health, it also represents a very expensive repair bill.
An effluent filter can be installed into a polyethylene outlet baffle; this will add a protection to the leaching bed. The effluent filter captures the fine particles carried by wastewater.
However, if your septic tank has one, it must be cleaned once or twice every year to prevent clogging. Simply remove the filter and rinse it with a garden hose over the solid side of your septic tank.
Please note that, since January 2009 in the province of Québec, every prefabricated septic tanks must comply with BNQ (Bureau de Normalisation du Québec) standard 3680-905, and be equipped with an effluent filter at the outlet.