Oxford County owns and operates all wastewater collection systems and treatment facilities within Oxford County.

All collection systems are operated by Oxford County staff, with the exception of the systems in Woodstock and Tillsonburg, which are operated by the City of Woodstock and the Town of Tillsonburg, respectively.

The Oxford County Biosolids Management Master Plan (BMMP) requires adherence to the Oxford County Sewer Use By-law No. 2719-87, plus amendment, Bylaw 5715-2015.

The County Sewer Use By-law staff collect "grab" or "composite" samples of several industrial and commercial discharges into the sanitary sewers to ensure compliance with the By-law. Unusual conditions such as higher than usual flows, unusual colour, large volumes of high solids or oil and grease waste streams, etc. can damage the wastewater collection system and cause upsets to the wastewater treatment facilities.

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