Septic Self-Assessment Tool
Credit Valley Conservation has launched a digital self-assessment tool to help you understand if your water sources may be at risk from your septic system. While targeted at those who reside in Credit Valley, the 'quiz' is useful for anyone on a septic system.
Frequently Asked Questions
Twice-yearly inspections of the effluent filter are essential to prevent solids from clogging your leaching field. Check risers for watertight lids and walk your leaching field to spot potential issues. Proper care, avoiding flushable wipes, and following maintenance guidelines prolong system life.
What is involved in replacing an old septic tank?
A permit is required in Ontario, and a professional should handle replacement. Options include connecting another tank in series or installing a new concrete or plastic tank. Decommissioning resources are available online.
Can I drive a riding lawnmower or small tractor over my leaching field?
Only grass should cover the leaching field. A standard lawnmower is fine, but avoid heavy equipment. Switch cutting patterns to reduce compaction, and never drive vehicles or snow equipment over the field.
What do I need to know about building risers for my septic system?
Risers must meet the Ontario Building Code and CSA B66 standards. Use commercially available green plastic risers with safety screens, and hire a professional for installation. Avoid homemade risers.
Are low-flush toilets safe for septic tanks?
Low-flush toilets are generally fine for residential use and help conserve water. Ensure reasonable water flow and avoid using multiple appliances simultaneously to maintain proper system function.
What should I consider when converting a detached shop to a residential unit?
Adding a residential unit increases daily design flow. A detailed system capacity assessment by a licensed engineer is usually required, and municipalities may require a septic review before issuing a permit.
Can I combine a septic bed with an inground heat pump system?
No. Maintenance on the heat pump could require digging through the leaching field, creating problems for both systems.
Are septic system additives like Septtoback beneficial?
There is no scientific proof that additives improve septic system performance. Resources are available online for further guidance.
Do older systems have effluent filters?
Effluent filters became mandatory in 2016. Older systems may have baffles but not fine filters. Retrofitting an F1 filter is recommended and must be done by a professional.
Should a 35-year-old system be inspected, and what does it cost?
Yes. Inspections cost several hundred dollars up to around $1,000, depending on complexity. Hire professionals with BCIN certification and experience.
How do I access the effluent system?
Green plastic risers allow safe access to the septic tank and effluent filter for maintenance and pump-outs.
Are water softeners safe for septic systems?
Do not discharge water softeners into a septic system unless it is specifically designed for it. Otherwise, use a soakaway pit or suitable alternative.
Is there an advantage to risers versus buried access ports?
Risers provide easier access for inspections and maintenance, increasing the likelihood that your system will be properly serviced.
Should I retrofit a filter on an older tank?
Yes. Installing an effluent filter on older tanks is one of the most cost-effective ways to improve performance. Combine this with risers for easy maintenance.
Should I clear trees or vines from an old leaching field?
Tree roots can clog leaching pipes. Clear small vegetation and start planning for system replacement. An inspection is recommended to assess functionality and potential hidden issues.
How can I overcome fear of inspections?
Budget monthly for septic system maintenance as you would for municipal water/wastewater services. Regular maintenance protects your water, your neighbors’ water, and public health.