The Sewerage System Regulation, Subdivision Regulations and Health Hazards Regulation are all relevant to governing of onsite sewage systems.
Larger wastewater systems are addressed by the Ministry of Environment through the Municipal Wastewater Regulation, under the Environmental Management Act.
The Sewerage System Regulation replaced the Sewage Disposal Regulation in 2005. The new regulation is outcome-based. This is a change from the old prescriptive approach and provides greater flexibility in how sewage systems are regulated. The Sewerage System Regulation was amended in June 2010. For more information, see Sewerage System Regulation Amendments (PDF, 23KB)
The Sewerage System Regulation applies to:
The regulation requires that:
Subdivisions are governed under the Subdivision Regulations, pursuant to the Local Services Act.
Subdivision applications are submitted to a municipal approving officer, who considers a number of factors, including onsite sewage disposal. This is where Health Authorities and the Ministry of Health may become involved. Onsite sewerage systems require a certain amount of land area and Health authorities may provide comments on whether the site and soil conditions and proposed lot size are favourable for onsite sewage management.
Section 8 of the Health Hazards Regulation requires wells to be set back at least 30 metres from possible sources of contamination (onsite septic systems should be placed an equivalent distance from any well).