Water and Wastewater
Oxford County owns and is responsible for the management, maintenance, and long-term capital planning for the County's water and wastewater systems.
Oxford County operates all water treatment facilities and wastewater treatment plants. The City of Woodstock and the Town of Tillsonburg operate portions of their water distribution and wastewater collection systems. Oxford County operates and maintains the water distribution and wastewater collection system in the remaining Area Municipalities and select portions of the City of Woodstock and Town of Tillsonburg systems.
If you have questions about water quality or meter issues, please contact your billing agent as shown on your utility bill. For after-hour emergency calls, find the numbers for your area listed on the Billing page.
Questions? Contact Public Works at 1-800-755-0394 from Monday to Friday, 8:30 am - 4:30 pm.
What's new
The 2025 Annual Water System Performance Summary Reports are now online. Oxford County treated and supplied approximately 11.9 million cubic metres of clean, safe and reliable drinking water to 21 communities through 17 municipal drinking water systems last year.
At the time of the February 25 report to County Council, results were available for eleven of Oxford’s municipal drinking water system inspections completed by Ontario’s Ministry of the Environment, Conservation and Parks. Nine systems received a 100% inspection rating (Beachville, Brownsville, Drumbo-Princeton, Embro, Hickson, Ingersoll, Innerkip, Lakeside and Plattsville) and two system received a 97% rating (Mount Elgin and Thamesford). The remaining system inspection report ratings were either not available at the time of the Council report or the inspection had not yet been carried out.
See the 2025 drinking water system annual reports online here.
The 2025, Annual Biosolids Summary Report, Wastewater Collection System Consolidated Linear Infrastructure Report and Wastewater Treatment System Summary Reports are now online. Oxford County responsibly treated 14.3 million cubic meters of wastewater from 11 serviced communities.
The March 11th report to County Council highlights that the County’s nine wastewater treatment plants provided effective treatment and demonstrated continued exceptional performance in 2025. Based on approximately 4,421 WWTP effluent samples collected and analyzed in 2025, seven of the nine County municipal WWTPs achieved 100% compliance ratings (with the remaining two receiving the following compliance ratings: Thamesford 98%, Plattsville 95%).
See the 2025 Annual Biosolids Summary Report, Wastewater Collection System Consolidated Linear Infrastructure Report and Wastewater Treatment System Summary Reports online here.
With 100% groundwater as Oxford County’s drinking water source, mineral build-up in the water distribution system is common. Regular watermain flushing helps maintain drinking water quality by removing build-up and mineral deposits in the distribution system. This is done by forcing water through watermains at high speed and discharging it through hydrants and blow-offs. The fast-moving water washes away any sediment.
Spring watermain flushing begins April 7 and runs until May 15, 2026. Find the spring flushing dates for your community here.
Oxford County’s updated Water and Wastewater Capacity Allocation Policy and By-law provides a framework and policy tools to manage how water and wastewater capacity is allocated across new developments in the County. Learn more
Oxford County Water and Wastewater Capacity Allocation Policy Webinar
A webinar for developers to present key changes and answer questions took place November 26, 2025.
Download the presentation slides
Oxford County has introduced an annual newsletter, “Waterline,” to replace other water and wastewater notices mailed throughout the year, including watermain flushing and outdoor watering notices. Residents can expect to receive the newsletter in the mail in March and are encouraged to keep it handy for future reference.
- Oxford County Administration Building
- Oxford County Library branches (all 14 branches)
- Oxford County Waste Management Facility
- Township of South-West Oxford office
- Town of Tillsonburg office
- Township of Zorra office
Oxford County's online calculator lets you estimate the monthly and annual water bill for someone living in your community. Try the calculator here
Before you dig, you must contact On 1 Call for all water and sewer locates. On 1 Call offers a free, 24/7 locate service both online or by calling 1-800-400-2255.