Here's what you need to know about Calgary's water situation

Starting Monday, Calgary's most critical water main will be shut down again. This means mandatory Stage 4 outdoor water restrictions come back into effect, certain roads will be closed for construction, and residents and businesses will be asked to cut back on treated water use.

The shut down comes after the city revealed the Bearspaw south feeder main — the underground highway that moves 60 per cent of Calgary's potable water across the city — needs additional, urgent repairs following its rupture on June 5.

Since that rupture, Calgary and the surrounding communities that depend on its water supply have been moving through various levels of water restrictions. 

In Calgary, there has been some level of water restrictions active all summer. The city has not been under Stage 4 water restrictions — the most restrictive stage — since July 6, when officials eased back to Stage 3.

The restrictions so far have just applied for outdoor water use, as the city has only asked that individuals and commercial water users voluntarily reduce their water consumption.

This time around, that remains the same, and the city is asking businesses to reduce their water usage by 25 per cent. 

For indoor use, the city is asking individuals to conserve water via these three steps:

During an Aug. 20 press conference, the city's manager of drinking water distribution, Chris Huston, said the safe consumption target is 450 million litres of water per day, which he said accounts for the Glenmore Water Treatment Plant operating at full capacity. The 450-million-litre daily use target is the same as the last round of Stage 4 restrictions.

The city's bylaw services are responsible for enforcing water restrictions and issuing penalties. 

According to Calgary's Water Utility Bylaw, water misuse fines range from $400 for a violation during Stage 1 restrictions to $3,000 for a violation during Stage 4.

Starting Monday, the city will reopen its non-potable Bow River water pickup locations for individuals and commercial use. 

From 5 a.m. to 7 p.m. daily for commercial users, and 4 p.m. to 7 p.m. daily for residential users, non-potable water will be available for collection from three sites: 

Construction will occur along 33rd Avenue N.W. between 78th Street and 87th Street N.W., and at Shouldice Park.

"Significant construction work in this area will begin on Monday, as well as beginning the feeder main repairs in Shouldice Park later in the week," said Francois Bouchart, the city's director of capital priorities and investment during a news conference Thursday.