Combined Sewage Water Testing
Certified testing for combined sewer flows to meet environmental regulations, permit conditions, and overflow monitoring requirements.
Certified testing for combined sewer flows to meet environmental regulations, permit conditions, and overflow monitoring requirements.
Combined sewage is the mixture of sanitary sewage and stormwater runoff that flows through a single pipe in combined sewer systems (CSS) — typically found in older Ontario cities. During heavy rainfall or snowmelt, the system can become overwhelmed and release untreated combined sewage into local waterways through combined sewer overflows (CSOs).
To protect public health and the environment, municipalities, facilities, and infrastructure managers must regularly monitor the quality of combined sewage to meet conditions under the Ontario Water Resources Act (OWRA), federal Wastewater Systems Effluent Regulations (WSER), and local Environmental Compliance Approvals (ECAs).
Canadian Water Compliance offers certified sampling and lab testing services for combined sewage, covering key parameters such as BOD, TSS, E. coli, nutrients, ammonia, heavy metals, oil and grease, and pH. Testing may be required during overflow events, wet-weather sampling, or as part of municipal infrastructure upgrades. We ensure every sample is properly collected, tested at an accredited lab, and reported with clarity and regulatory alignment.
Combined sewer systems are still present in many older Ontario communities, and proper monitoring is essential to limit pollution from overflow events. Under both the Ontario Water Resources Act and municipal sewer use bylaws, cities and facilities must track combined sewer outflow quality, especially during wet weather.
Canadian Water Compliance performs accurate testing of combined sewer flows — whether during system stress events or as part of ongoing infrastructure projects — helping you maintain compliance and demonstrate environmental stewardship.
Untreated overflows of combined sewage can release pathogens, solids, and nutrients directly into local rivers, creeks, and lakes, posing risks to aquatic ecosystems and public health. As part of your due diligence under federal wastewater regulations (WSER) and ECA requirements, Canadian Water Compliance provides CSO and wet-weather event sampling, detailed lab reports, and regulatory insight.
Avoid enforcement actions, protect your infrastructure, and help reduce environmental impacts with proactive testing services.
Whether your testing is triggered by wet-weather flows, overflow notifications, or permit conditions, our team handles everything from scheduling and certified sampling to accredited lab analysis and regulatory reporting. We test for common parameters like E. coli, BOD, suspended solids, turbidity, metals, pH, and more.
Canadian Water Compliance supports municipalities, engineering consultants, and facility managers with fast turnaround, reliable sampling, and a deep understanding of Ontario wastewater legislation.
Serving across Toronto, Mississauga, Brampton, London, Kitchener, Niagara, St. Catharines, Guelph, Waterloo, Collingwood, Barrie, Wasaga Beach, Midland, Huntsville, Gravenhurst, Minden, Oshawa, Peterborough, Kingston, Ottawa, Scarborough, Markham, Richmond Hill, Vaughan, Burlington, Etobicoke, Pickering, Ajax, Whitby, Caledon, Milton, Hamilton, Oakville and the surrounding areas.