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Septic Tanks

septic

Standard BNQ 3680-905
Prefabricated Septic Tanks for Residential Use – Dimensional and Physical Characteristics

Waste water treatment relies on structures designed to be solid, effective and safe. For that reason, the BNQ has developed a series of standards governing septic tanks, holding tanks and absorbing wells. In particular, the BNQ 3680-905 standard specifies the dimensional and physical characteristics of prefabricated septic tanks in concrete, fiber-glass reinforced polyester or polyethylene for residential use. It applies to prefabricated septic tanks intended for underground installation to store waste water, including household waste water prior to its conveyance to a purifying element, leaching field or waste water treatment system.

  • Download standard
    12650 ANG BNQ 3680-905 Prefabricated Septic Tanks for Residential Use - Dimensional and Physical Characteristics
    This is a reaffirmation (reapproval) of the edition dated October 8, 2008.
    REVISION IN PROGRESS (expected date for the new edition: March 2026)
    8430 FRN BNQ 3680-905 Fosses septiques préfabriquées pour usage résidentiel - Caractéristiques dimensionnelles et physiques
    Il s'agit d'une reconduction (confirmation) du texte de l'édition du 8 octobre 2008.
    REVISION IN PROGRESS (expected date for the new edition: March 2026)

  • Standards committee members
    Number of committee members : 13
    Yves BeaulieuConsumaj inc. (représentant de l'AIMQ)
    Marie-Christine BélangerPremier Tech Water and Environment
    Marie-Claude BergeronMDDELCC - Direction générale des politiques de l'eau - Direction des eaux municipales
    Normand BoyerLes Blocs Normand inc.
    Daniel CimonCorporation des officiers municipaux en bâtiment et en environnement du Québec
    Jacques GagnéJacques Gagné experts-conseils inc.
    Daniel GélinasXactics (2001) International inc.
    Claude GillesRéseau environnement
    Hélène LapointeOrdre des ingénieurs du Québec - Major & associés
    Marc OtisTubécon / Béton provincial ltée
    David RoySociété d'habitation du Québec
    Daniel St-PierreMEI Assainissement
    Christian VézinaNORDIKeau

 

Certification Offer

Marque de certification - Fosses septiquesFor a structure manufacturer conducting business in Québec, BNQ certification is an excellent calling card. The BNQ has therefore established a certification program to certify waste water treatment structures based on four documents, including the BNQ 3682-925 protocol. This protocol establishes the procedural rules and marking requirements applicable to the certification of prefabricated septic tanks conforming to the requirements of BNQ 3680-905, prefabricated holding tanks conforming to the requirements of BNQ 3682-901 and prefabricated structures for absorbing wells conforming to the requirements of BNQ 3682-850.

This certification program is accredited by the Standards Council of Canada.