Mueller constructed the hydrants, which were delivered by Wolseley to the work site around spring 2014, according to the document delivered by the office of the city solicitor.
As the city investigated the source, residents in Aspen Ridge were required to use bottled water, water trucks, and temporary water lines.
“The City says that Mueller and/or Wolseley knew, or ought to have known, about the potential for the contamination substance to form in Mueller hydrants, and failed to warn the City of this dangerous condition,” the statement reads.
READ MORE: Source of mystery contaminant unknown as Rosewood water advisory lifted The city contends the companies should have known the hydrants would be connected to its potable water system.
None of the allegations have been proven in court.
Neither of the defendants immediately responded to a request for an interview with Global News.
The city’s losses and damages are said to include the following: Costs of inspecting the water system; Cleaning up the contamination; Setting up temporary water lines; Providing water; Retaining experts to investigate the source of the contamination; and Identifying the substances.
READ MORE: Stantec Consulting recommended to remediate contaminated water lines After the hydrocarbons surfaced, Saskatchewan’s Water Security Agency required the city to inspect nearby hydrants and either remove and replace the affected infrastructure or bring in an engineering consultant.
In May, a “do not use” order was issued in Saskatoon’s Rosewood area after contaminated Mueller fire hydrants were discovered.
The advisory resulted in temporary water lines being installed at the neighbourhood Costco.

The company that was hired by the City of Saskatoon to complete a preliminary investigation, after hydrocarbons were detected in some hydrants in a new neighbourhood, is being recommended by administration to develop and implement the remediation plan.
Hydrocarbons were discovered in the hydrants in January, prompting the Saskatchewan Water Security Agency to issue a Do Not Use drinking water notice for 19 addresses in Aspen Ridge.
Then in May, hydrocarbons were detected in the water line supplying the Costco store in the Rosewood neighbourhood.
A Do Not Use notice was issued and a temporary water line installed.
READ MORE: Temporary water supply established for Costco after hydrocarbons detected Administration said Stantec Consulting is best suited to develop the plan and oversee construction.
They added that accepting the estimate would allow the project to proceed without interruption and address any other required remediation by the end of the construction season.
If approved by the committee and city council, Stantec Consulting would investigate the water system to determine the scope of the contamination, prepare an action plan, and provide oversight and supervision during construction.
A final report would then be issued to provide the information necessary for the removal of the Do Not Use notices.
A final determination of the funding source will be provided to council at a later date following internal negotiations.
© 2018 Global News, a division of Corus Entertainment Inc.

Ground shifting caused by a sudden drop in temperature over the weekend triggered nine water main breaks across Saskatoon between Monday afternoon and Tuesday morning.
Lack of running water forced cancellation of classes at Caswell School, which will also remain closed today.
City Hospital — which receives water from three water main lines, including one that broke Monday night — issued a precautionary boil water advisory because of a drop in its water pressure.
City staff delivered door hangers to people living in affected buildings, including nine downtown apartment complexes, informing them of the breaks.
As of Tuesday morning, water trailers were available to provide drinking water to people who would be without water for more than 24 hours, and city-owned leisure centres opened their changing facilities so people in affected areas could shower for free if they presented identification confirming their addresses.
Munro said it costs about $12,000 to fix each water main.
Traffic on 25th Street was snarled on Tuesday morning and road restrictions may last until Thursday morning.
Munro said this week marked the first time the 47-year old pipe has failed.
Although Saskatoon frequently experiences significant temperature swings, there’s little the city could have done to prevent this week’s mass water main breaks, Munro said.
It would be very, very costly, making the water difficult for people to afford.

City to consider bottled water sale ban at events, facilities.
The City of Saskatoon could be going blue.
A city council committee voted Monday to explore the implications of becoming a “blue community” by declaring drinking water a human right and banning the sale of bottled water at city events and facilities.
Gail Stevens, representing the Saskatoon chapter of the Council of Canadians, appeared before the environment, utilities and corporate services committee to make the request.
Stevens said she wants the city to develop its own policy rather than just adopt the proposals she presented.
In addition to committing to the principle that safe drinking water qualifies as a human right, the blue community concept also entails committing to publicly financed, operated and owned water and waste water services.
Stevens noted the initiative would involve some costs, such as installing and maintaining water fountains in public places.
Coun.
Darren Hill voted against further exploring the idea after expressing concern about the public financing commitment.
Hill said every project should be evaluated based on its own merits.

Group calls for Saskatoon to ban bottled water at city events.
Saskatoon’s chapter of the Council of Canadians is calling on the city to ban the sale of bottled water at municipal facilities and events.
Gail Stevens, with the Saskatoon chapter, will make a presentation this morning to the city’s standing committee on environment, utilities and corporate services about joining the group’s Blue Communities Project.
Part of becoming a Blue Community is the phasing out of the sale of bottled water.
Tap water is the safer choice and is less harmful to the environment, says Stevens, citing the fossil fuels used to make and transport bottled water and the waste they produce.
The bottled water is one of three planks of the project; cities taking part would also have to recognize water as being a human right, and promote publicly financed, owned and operated water and wastewater treatment facilities.
Phasing out bottled water may mean installing a few more water fountains and water bottle fill stations, but Stevens says the change is not necessarily a costly one.
"Not when you consider the huge benefits to health and to the environment."
She cites other communities’ creative solutions to providing drinking water at events, such as makeshift "water wagons" where people can fill their reusable bottles.