Class 4 septic systems have a lifespan of 15 to 40 years. To maximize the lifespan, proper maintenance, including having it inspected and pumped out every 3 – 5 years is critical. The OMAFRA brochure called Septic Smart is a useful document that explains how a septic system works and lists a number of “dos” and “dont’s” for safe operation and proper maintenance.
North Frontenac has a free voluntary Septic system re-inspection program. The Federation of Ontario Cottage Associations has some useful guidelines and information about septic systems. Another good resource is the Ontario Onsite Wastewater Association