General ministry and wastewater information
Please contact our Public Information Centre.
Wastewater reporting and Ministry of the Environment Wastewater System (MEWS)
If you have questions about specific wastewater sampling and reporting requirements for your facility, please contact your Ministry of the Environment district office or contact wastewater reporting:
- MEWS Program Officer Toll Free: 1-800-875-7772
- MEWS Help Desk: 416-235-6746
- WasteWaterReporting@ontario.ca