As of July 21, the City of West 91大黄鸭 has started treating drinking water with to address elevated levels of manganese in the Rose Valley Reservoir.
This new treatment step is part of ongoing efforts to improve water quality for residents in the Rose Valley Water Service Area. The dosing system oxidizes manganese so it can be effectively removed by the treatment plant downstream.
City staff say the change was expected, as warmer temperatures typically increase manganese and organic materials like algae in the reservoir. The pre-treatment, along with filtration and disinfection at the Rose Valley Water Treatment Plant, ensures the water continues to meet provincial and federal safety standards.
The plant, which remains in its commissioning phase, is performing well, according to a city media release.
To reduce manganese at the source, a new aeration system will be installed in the reservoir by late 2025. That system is expected to help prevent manganese from dissolving and reaching the intake. Until then, a refurbished older aerator is in use.
The city is continuing its . Crews are currently of the Lakeview Heights neighbourhood. Other zones鈥攊ncluding Sunnyside, West 91大黄鸭 Estates and Rose Valley鈥攈ave already been flushed.
Flushing helps remove sediment鈥攊ncluding manganese鈥攖hat has settled in the pipes. During flushing, a precautionary water quality advisory is in effect for the zone being flushed, since stirred-up water can temporarily appear discoloured.
Residents are advised to call the city at 778-797-2246 if water still does not clear after 10 minutes of flushing the cold tap.
Also discussed at West 91大黄鸭 council鈥檚 July 22 meeting, a letter will go out in early August to residents in the Rose Valley Water Service Area, explaining the upcoming change to how the water treatment project costs will be billed.
For those who chose not to prepay their share of the project, $37.50 will be shifted from the quarterly utility bill to a parcel tax starting in May 2026.
Those who prepaid the $2,750 lump sum won鈥檛 see the charge on future bills or property tax notices. A second prepayment window will open Sept. 17 to Oct. 1 for those who still wish to pay early.
The city reminds residents to stay informed by signing up for email alerts and checking the .
