The District of North Vancouver is conducting green dye testing in its sewer and stormwater systems to check water flow and identify possible leaks or cracks, according to a notice from the District.
The testing involves releasing a fluorescent green dye into the systems, allowing crews and contractors to observe how water moves through the network and locate damaged sections. The District said the dye is non-toxic, biodegradable, and safe for people, pets, and the environment.
Residents may notice bright green water in catch basins, drainage areas, or local waterways during testing. The colour may remain visible for several hours or up to a few days, depending on weather conditions. Officials noted that while the dye resembles antifreeze in colour, it is odourless and harmless.
According to the District, the dye is typically green but may occasionally appear blue or red depending on the test. Residents do not need to report sightings of coloured water unless they detect unusual odours or other signs of pollution.
Anyone with concerns about water or sewer quality can contact District staff here.
