The total cost of upgrades to the largest of Winnipeg's sewage treatment plants has risen to $2.2 billion and will likely increase further, according to city financial status reports and previous budget documents. This is leading to renewed concerns about the cash required to continue improvements to the North End Water Pollution Control Centre, which processes sewage from the Kildonans, Transcona, Elmwood, the North End, the West End, downtown neighbourhoods and parts of River Heights, St. James and St. Boniface.