Sewer Dye Testing

Dye testing is used by the Town to track the flow of wastewater (the water that goes down your drains and toilets) into our sew​er system. We track where the wastewater goes to ensure our infrastructure is in good working condition. 

​Dye testing in residential areas is generally completed by our Wastewater Division staff via door-to-door visits.

View from inside of a drain pipe with green dye

Sewer Dye in Drain

Frequently Asked Questions

All Town employees carry a Municipal Photo ID card with their photo on it.

The test requires our staff to have access to your home, so it is appreciated if someone can be home during the testing window. If you are unable to be home during this period you will be contacted to arrange an appointment.

The dye is placed in one of your toilets and flushed. If you see residual dye in the bowl later on, simply flush it away. It is safe to use your toilet even if colour remains. If coloured water appears on your floor or elsewhere in your home, you likely have a leaky toilet and should have it checked immediately.​

Sewer dyes are specifically designed for this purpose, and are non-toxic and biodegradable. They are brilliantly coloured to allow tracking, but not harmful to people, animals or the environment.

Contact Us

Town of Bradford West Gwillimbury
100 Dissette St., Unit 7&8
Bradford, ON, L3Z 2A7

Phone: 905-775-5366

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