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EPCOR Water Services Inc.

EPCOR Water Services Inc. (EWSI) provides quality water and wastewater services to more than 85 communities and industrial sites across Western Canada.

EWSI also builds, owns and operates water and wastewater facilities, working in partnership with governments, municipalities and industrial clients.

Effective partnerships

Municipalities and industry enlist us to help address the challenge of providing top quality water and wastewater services in a reliable, safe and environmentally responsible way. Our partners also trust us to provide Design, Build, Finance, Operate and Maintain (DBFOM) options when constructing and upgrading infrastructure.

Our partnerships have allowed small communities to maintain public ownership and regulation of their infrastructure while gaining access to EPCOR's expertise in innovative design, construction, and cost-effective technologies.

A history of service

Since the city's first water treatment plant was constructed in 1903, we've been Edmonton's water provider. The current Rossdale Water Treatment Plant was built in 1947, and a second water treatment plant, E.L. Smith, was constructed in southwest Edmonton in 1976.

In 1996, the City of Edmonton's water branch became part of EPCOR and was incorporated as a separate legal entity called Aqualta Inc. In 1999, Aqualta was re-named EPCOR Water Services, and in 2009, the City of Edmonton transferred ownership of the Gold Bar Wastewater Treatment Plant to EPCOR Water Services.

Regulatory compliance

EWSI operates within the bounds of municipal, provincial and national bylaws, regulations and guidelines. Learn more using the documents below.

EPCOR Water Services Inc.

Approval to Operate

City of Edmonton Bylaws

Provincial Bylaws 

Federal Bylaws


Drainage Services

On September 1, 2017, the City of Edmonton transferred its Drainage utility to EPCOR, giving EPCOR responsibility for Edmonton's entire water cycle. Drainage Services provides wastewater and stormwater drainage services to Edmonton residents by planning, building, operating, and maintaining the pipes, tunnels, pump stations, biosolids management, and stormwater management facilities that make up the drainage network.

The drainage system consists of the sanitary collection and stormwater collection infrastructure. The sanitary collection infrastructure includes 2,824 km of sanitary sewer pipes, and 262,363 service connections that connect all customers to sanitary trunk sewers. Sanitary trunks then deliver wastewater directly to the Gold Bar Wastewater Treatment Plant.

The stormwater collection infrastructure includes 3,301 km of storm sewer pipes, 168,146 storm service connections, 62,128 catch basins, 87,424 manholes, 90 pump stations and 295 stormwater ponds. This collection infrastructure is connected to the storm water trunk sewers, which in turn connects to the wetlands for treatment or directly to the North Saskatchewan River. The wetlands help remove over 20,000 tonnes of total suspended solids each year before discharging to the river outfalls.

The drainage system also includes 826 km combined sanitary and storm sewers. EPCOR continues to improve and expand the underground Drainage infrastructure system through its in-house construction expertise, performing open-cut and tunnel construction using an in-house workforce, as well as specialized equipment such as tunnel boring machines.

Approval to Operate

EPCOR Distribution and Transmission Inc.

If you live in the City of Edmonton or a neighborhood nearby, EPCOR Distribution and Transmission Inc. (EDTI) delivers and maintains your electricity.

What we do

EDTI owns and operates many substations and transmission lines that form part of the Alberta interconnected electric system. EDTI is regulated by the Alberta Utilities Commission (AUC).

EDTI is also responsible for administration of the Distribution Tariff, required by the Alberta Electric Utilities Act. The Tariff defines the terms, conditions and rate structure under which EPCOR provides electrical services. The terms include charges for system access service, distribution access service billing and electrical energy.

We're also fully committed to protecting the environment and the health and safety of our employees, customers and neighbors. Read our Heath, Safety & Environment (HSE) Policy.

Supporting Alberta's competitive electricity market

EPCOR supports Alberta's competitive electricity market by:

  • Reading the power meters in Edmonton so we can provide usage information to your chosen retailer.
  • Producing a retailer handbook.
  • Providing distributed generation and micro-generation information.
  • Maintaining a site directory for Edmonton.

  • Providing load settlement services.

EDTI is the Wires Owner

As the Wires Owner, we build, operate and maintain the electrical distribution system primarily in and around Edmonton.

EDTI also:

  • Provides the Distribution Tariff and settlement services in Edmonton for the competitive electric market.
  • Manages and collects load data in the Edmonton area through meter reading, data collection and management.
  • Operates 296 circuit kilometres of aerial transmission lines and underground transmission cables routed through 31 transmission substations
  • Distributes electrical energy to customers in Edmonton through 5 distribution substations, 296 distribution feeders and approximately 6,302 circuit kilometres of primary distribution lines.
  • Distributes about 13% of Alberta's energy consumption to approximately 374,902 residential and 38,509 commercial consumers in Edmonton.
  • Provides services to the Transmission Administrator, which manages the provincial power grid.

EDTI complies with the Code of Conduct Regulation and the Inter-Affiliate Code of Conduct. Learn more about the codes and our Compliance Plans.

EPCOR Energy Alberta GP Inc.

EPCOR Energy Alberta GP Inc. (EEA GPI) provides:

  • A Regulated Rate Option (RRO) and Default Supply on behalf of EPCOR Distribution & Transmission Inc., FortisAlberta and a number of Rural Electrification Associations (REA).

  • Customer service and billing for EPCOR regulated residential, farm and small business energy, water and drainage customers, EPCOR's competitive power and gas supplier, Encor by EPCOR, as well as the City of Edmonton's Waste Management branch.

In addition, EEA GPI must comply with the Code of Conduct Regulation and the Inter-Affiliate Code of Conduct. Learn more about the codes and our Compliance Plans.


Customers are free to purchase natural gas services or electricity services from a retailer of their choice. For a list of retailers, visit or call 310-4822 (toll free in Alberta).



​EPCOR USA serves more than 780,000 people across 42 communities and 18 counties in Arizona, New Mexico and Texas, making it one of the largest private regulated water utilities in the U.S. Southwest. In addition to regulated water and wastewater service in Arizona and New Mexico, EPCOR USA delivers wholesale water services and natural gas services in Texas. EPCOR's regulated operations include natural gas utility service to approximately 5,350 connections and wholesale natural gas transmission services to local distribution utilities.

EPCOR USA's Arizona utilities are subject to the rules and regulations of the Arizona Corporation Commission (ACC), which, in addition to regulating specific aspects of service, approves rates charged for water and wastewater service. The New Mexico utilities are subject to the rules and regulations of the New Mexico Public Regulation Commission (NMPRC). The regulated gas services in Texas are subject to the rules and regulations of the Railroad Commission of Texas.

EPCOR USA operates in the following service areas:


  • Agua Fria
  • Anthem
  • Chaparral
  • Havasu
  • Luke 303
  • Mohave
  • Paradise Valley
  • Rio Verde
  • San Tan
  • Sun City
  • Sun City West
  • Tubac
  • Willow Valley

New Mexico

  • Clovis
  • Edgewood
  • Thunder Mountain


  • Austin Metropolitan Area (water supply pipeline)
  • Greater Northwest Houston area
  • San Antonio Metropolitan Area (Vista Ridge)
EPCOR Technologies

EPCOR Technologies is an integrated service provider offering Fiber Optic Solutions and Underground Residential Distribution Equipment (URD) Sales in the Alberta marketplace. As an unregulated operating subsidiary of EPCOR Utilities Inc., we serve government, utility and private customers such as developers, general contractors and industrial organizations.

Learn more about EPCOR Technologies.

EPCOR Ontario

​Natural Gas

EPCOR Natural Gas Limited Partnership is an Ontario corporation with its head office in Alymer, Ontario. It carries on the business of selling and distributing natural gas to over 9,000 customer throughout Elgin, Middlesex, Oxford and Norfolk Counties in southwestern Ontario.

EPCOR is also currently constructing a new natural gas distribution system to serve the Municipality of Kincardine, the Municipality of Arran-Elderslie and the Township of Huron-Kinloss.


As the electricity distributor to 3 major communities in Ontario's Simcoe County, plus a portion of the town of Blue Mountains (formerly Thornbury), we serve close to 17,540 people:

• Collingwood — 13,330
• Stayner — 1,988
• Creemore — 657
• Thornbury — 1,565