Ontario’s utility sector is the backbone of the province’s infrastructure, ensuring reliable electricity, water, and energy distribution to millions of residents and businesses. With a diverse mix of publicly owned and private utility providers, the province’s energy landscape is shaped by regulatory frameworks, market demands, and ongoing technological advancements.
From large-scale electricity transmission networks to local distribution systems, these companies play a crucial role in maintaining grid stability, integrating renewable energy sources, and supporting economic growth. As Ontario transitions towards a more sustainable and resilient energy future, utility providers are investing in modernization, grid expansion, and innovative energy solutions.
This article explores the major utility companies in Ontario, their services, and their impact on the province’s energy and infrastructure landscape. It also provides insight into the electricity market, challenges in utility management, and the growing role of renewable energy in Ontario’s future.
Major Utility Companies in Ontario
Several major players dominate Ontario’s utility sector, each with specific service areas and offerings.
Here’s a closer look at some of the most prominent companies:
Hydro One
Hydro One is Ontario’s largest electricity transmission and distribution provider, delivering power to approximately 1.5 million customers across the province. The company operates an extensive transmission network, covering 98% of Ontario’s geographic area.
Recently, Hydro One expanded its transmission footprint in Northern Ontario by acquiring a 48% interest in the East-West Tie Limited Partnership, which owns a critical 450-kilometer transmission line connecting Northwest Ontario communities to the provincial grid.
This investment underscores Hydro One’s commitment to ensuring reliable electricity delivery and fostering economic opportunities in the region.
Services Offered by Hydro One
Hydro One provides a range of services tailored to residential, commercial, and industrial customers.
Residential Services
- Account and Billing:
- Understanding Your Bill: Hydro One offers a detailed breakdown of electricity bills to help customers track and manage their energy costs.
- Billing and Payment Methods: Multiple payment options are available for convenience.
- Pricing Plans: Customers can select from various pricing plans based on their energy consumption patterns.
- Ontario Electricity Rebate: Eligible customers can receive rebates to help lower their electricity costs.
- Moving and Service Changes:
- Moving In/Out or New Service: Hydro One assists with account transfers, new service connections, and service cancellations.
- Service Upgrades: Customers can request an upgrade to increase their electrical supply.
- Outages and Safety:
- Outage Alerts: Hydro One provides real-time notifications to keep customers informed about power disruptions.
- Click Before You Dig: A service that helps homeowners and contractors locate underground cables before digging to prevent damage and ensure safety.
- Tree Trimming: Hydro One conducts routine tree trimming near power lines to minimize outage risks and maintain electrical safety.
- Additional Services
- Meter Reading Submission: Customers can submit their own meter readings for accurate billing.
- Temporary Service Disconnection: A service available for planned electrical work or renovations.
- Support for Seasonal Residents: Special information and services tailored for customers who reside in Ontario seasonally.
- Electric Vehicle (EV) Buyer’s Guide: A resource for customers exploring EV ownership and charging options.
- Financial Assistance Programs: Hydro One offers financial support to eligible customers who need help paying their electricity bills.
- Right-of-Way Land Use: Reviews and approvals for secondary land use on Hydro One’s right-of-ways.
- Electrical Inspections: Inspection services to ensure electrical safety and compliance.
- Stray Voltage Assessments: Evaluations to detect and resolve stray voltage issues on properties.
- Large Vessel Move Coordination: Hydro One assists in coordinating the safe transport of oversized vessels.
- High Usage Alerts: Notifications to help customers monitor and manage high electricity consumption.
- Sentinel Light Rental Program: Outdoor lighting rental services for residential and commercial properties.
Hydro One is actively involved in grid modernization initiatives, leveraging advanced technologies to improve grid reliability and enhance customer engagement.
The company is implementing a technology initiative that utilizes Itron’s Distributed Intelligence (DI) applications and Distribution Automation (DA) solutions
This first-of-its-kind DI project integrates several DI applications into lab and field meters, prioritizing grid reliability and enhancing the customer experience by providing them with greater visibility into their energy usage.
Alectra Utilities
Alectra Utilities is the largest municipally-owned electric utility in Canada, serving over one million homes and businesses in Ontario’s Greater Golden Horseshoe area. The company is committed to improving the reliability of its electricity grid and invests heavily in capital renewal projects across its 17 communities.
In 2024, Alectra plans to invest approximately $297 million to renew aging equipment and install new infrastructure to handle growing demand .
Alectra’s commitment to grid reliability is evident in its capital renewal projects in specific communities. For example, in Barrie, Alectra is investing $3.6 million to replace aging infrastructure, $3.4 million to rehabilitate underground cables, $3.5 million to connect new customers, $700,000 to modernize substations, and $250,000 to deploy new automated devices . Similar investments are being made in Brampton, Markham, Mississauga, and Vaughan to enhance grid reliability and resilience.
Alectra offers a wide range of services, including:
Alectra also demonstrates its leadership in sustainability through its Innovation projects and the Alectra GRE&T Centre.
The GRE&T Centre objectively assesses technologies, conducts pilot projects, and engages in detailed studies to evaluate the benefits of emerging sustainable energy solutions. Alectra’s innovation projects focus on identifying clean energy trends and in-demand technologies, such as electric vehicle charging behavior, microgrids, and energy storage, to help the company stay at the forefront of energy transformation.
For customers facing challenges with overdue bills, Alectra offers the “back on track, together” program . This program provides support, access to assistance programs, and payment arrangement options to help customers manage their electricity costs and avoid late payment charges.
Elexicon Energy
Elexicon Energy is a regulated electricity distribution company serving approximately 174,000 homes and businesses in ten municipalities in east central Ontario . The company is committed to grid modernization and the integration of innovative technologies to provide reliable and cost-effective services.
Elexicon Energy also prioritizes customer satisfaction and public awareness. In 2023, the company connected 98.57% of eligible low-voltage residential and small business customers to its system within the five-day timeline prescribed by the Ontario Energy Board (OEB).
To gauge overall electrical safety awareness among the public, Elexicon commissions a research firm to conduct an annual Public Awareness of Electrical Safety Survey .
Elexicon Energy offers a variety of services, including:
- Electricity Distribution: Elexicon Energy delivers electricity to homes and businesses in its service territory.
- Service Connections and Upgrades: The company provides services for connecting new services, temporarily disconnecting service, upgrading service, and removing service from a property.
- Rebates and Programs: Elexicon Energy offers various rebates and programs to help customers save energy and money, including the Energy Affordability Program, Enbridge rebates, and the Durham Greener Homes program.
- Customer Choice: Elexicon Energy offers residential and small business customers three electricity price plan options: Time-of-Use, Tiered, and Ultra-Low Overnight.
- Financial Assistance: The company provides resources and assistance to customers needing help paying their electricity bills.
Elexicon Energy demonstrates its focus on community engagement through its support for local not-for-profit organizations and various worthy causes. In 2019, the company invested $303,332 to support local organizations that contribute to community well-being.
Hydro Ottawa
Hydro Ottawa Holding Inc. is a private company wholly owned by the City of Ottawa, delivering electricity to approximately 364,000 homes and businesses in the city and the Village of Casselman.
Hydro Ottawa Holding Inc. and its subsidiaries are committed to sustainability and reducing their environmental impact. The company has set a target to achieve net-zero operations by 2030.
Hydro Ottawa also focuses on community engagement and emergency preparedness, particularly in the face of climate change and extreme weather events.
Hydro Ottawa offers a range of services, including:
- Electricity Distribution: Hydro Ottawa distributes electricity to homes and businesses in its service territory.
- Renewable Energy Generation: Through its subsidiary, Portage Power, Hydro Ottawa is the largest municipally-owned producer of green power in Ontario, operating hydroelectric generation plants and solar installations .
- Energy Solutions: Hydro Ottawa’s subsidiary, Envari Energy Solutions Inc., offers energy management products and services to reduce environmental impacts and improve energy efficiency .
- Telecommunications: Hydro Ottawa’s subsidiary, Hiboo Networks Inc., provides high-speed fiber optic network solutions and internet service in the Ottawa-Gatineau region
- Unit Metering: Hydro Ottawa offers unit metering solutions for apartment buildings and condos, allowing for individual electricity billing and promoting energy conservation .
- Commercial Services: Hydro Ottawa provides various commercial services, including EV charging connection, Industrial Conservation Initiative (ICI), Energy Reporting and Benchmarking (EWRB), and high voltage vault resources .
Hydro Ottawa’s Conditions of Service outline important safety regulations and customer responsibilities. These conditions cover aspects such as maintaining safe distances from overhead power lines, obtaining utility locates before digging to avoid underground cables, and ensuring access to Hydro Ottawa equipment for inspection and maintenance.
Hydro Ottawa is committed to promoting a smart energy future through its initiatives in renewable energy generation, energy solutions, and digital transformation. The company’s strategic direction for 2021-2025 emphasizes achieving net-zero operations, becoming a partner of choice for green energy projects, accelerating digital transformation, and leveraging distributed energy resources .
To enhance customer convenience and engagement, Hydro Ottawa offers a mobile app that allows customers to manage their accounts, report outages, and access other services . The app provides features such as viewing electricity usage and cost information, receiving personalized energy-saving tips, accessing outage maps, and reporting problems.
To enhance customer convenience and engagement, Hydro Ottawa offers a mobile app that allows customers to manage their accounts, report outages, and access other services . The app provides features such as viewing electricity usage and cost information, receiving personalized energy-saving tips, accessing outage maps, and reporting problems.

Toronto Hydro
Toronto Hydro is a holding company owned by the City of Toronto, responsible for distributing electricity, engaging in conservation and demand management activities, and providing street lighting in the city.
Toronto Hydro plays a crucial role in Ontario’s electricity system, facilitating the journey of getting power to homes and businesses. This journey involves electricity generation at power plants, transmission through high-voltage lines, and distribution to end customers through Toronto Hydro’s network.
Toronto Hydro offers a variety of services, including:
- Electricity Distribution: Toronto Hydro distributes electricity to approximately 768,000 residential, commercial, and industrial customers in Toronto .
- Conservation and Demand Management: Toronto Hydro actively promotes energy conservation and offers programs to help customers manage their electricity consumption.
- Street Lighting: Toronto Hydro provides street lighting and expressway lighting services in the city .
- Service Connections: Toronto Hydro offers various service connection options, including new service installation, service upgrades, service relocations, isolations, permanent disconnections, metering, temporary service installations, and service repairs .
- Online Tools and Services: Toronto Hydro provides online tools and services to help customers manage their accounts, report outages, track energy usage, and access information on rates and programs .
Toronto Hydro is committed to delivering safe, reliable, and clean electricity to Torontonians. The company is investing heavily in grid modernization and expansion to meet the city’s growing electricity needs . In November 2024, the Ontario Energy Board approved Toronto Hydro’s plan to invest approximately $5.1 billion in its grid and operations over the next five years . This investment will enable the utility to renew aging electrical infrastructure, improve reliability, and meet evolving customer needs driven by the economy, housing, and decarbonization.
Toronto Hydro is taking a proactive approach to climate change adaptation through its Climate Action Plan and investments in grid modernization. The company recognizes the importance of building a resilient grid to withstand the increasing frequency and intensity of extreme weather events. Toronto Hydro’s Climate Action Plan focuses on expanding and modernizing the grid to support the City of Toronto’s net-zero 2040 vision.
To empower customers to make informed energy choices, Toronto Hydro offers the Green Button program . This program allows customers to securely share their energy usage data with pre-approved third-party companies. By accessing and analyzing their energy data, customers can identify opportunities to save energy, reduce costs, and make more sustainable choices.

Impact of Utility Companies on Energy, Water, and Infrastructure in Ontario
Ontario’s utility companies have a significant impact on the province’s energy, water, and infrastructure.
They are responsible for:
Grid Reliability and Resilience
Utility companies maintain and operate the electricity grid, ensuring a reliable supply of power to homes and businesses across Ontario.
They invest in grid modernization initiatives, leveraging advanced technologies to improve grid reliability, efficiency, and resilience.
This includes upgrading aging infrastructure, implementing smart grid technologies, and enhancing emergency response capabilities.
Economic Development
Environmental Sustainability
Many utility companies are actively involved in promoting and integrating renewable energy sources, such as hydroelectricity, wind, and solar power, into the electricity grid.
They also invest in infrastructure projects to support the transition to a cleaner energy system. Hydro One, for instance, is collaborating with First Nations on transmission infrastructure projects to support Ontario’s clean energy future.
This collaboration not only enhances the electricity grid but also advances meaningful reconciliation with Indigenous communities.
Climate change is increasing the frequency and intensity of extreme weather events, which can impact the electricity grid and infrastructure. Utility companies are adapting to these challenges by investing in climate change adaptation and resilience measures. Hydro Ottawa, for example, recognizes the vulnerability of infrastructure to extreme weather and is taking steps to enhance its resilience.
This includes modernizing distribution infrastructure, adapting planning and construction practices, and integrating climate considerations into long-term strategies.

Impact of Utility Companies on Energy, Water, and Infrastructure in Ontario
Grid Reliability and Resilience
Economic Development
A reliable electricity supply is essential for economic growth, and utility companies play a crucial role in attracting new investments and supporting job creation.
For example, in 2019, Elexicon Energy generated economic benefits of over $104 million for the Province of Ontario and the communities it serves . This includes operating expenses, capital expenditures, dividends, and payments to capital providers and the government.
Environmental Sustainability
Many utility companies are actively involved in promoting and integrating renewable energy sources, such as hydroelectricity, wind, and solar power, into the electricity grid. They also invest in infrastructure projects to support the transition to a cleaner energy system.
Hydro One, for instance, is collaborating with First Nations on transmission infrastructure projects to support Ontario’s clean energy future . This collaboration not only enhances the electricity grid but also advances meaningful reconciliation with Indigenous communities.
Climate change is increasing the frequency and intensity of extreme weather events, which can impact the electricity grid and infrastructure. Utility companies are adapting to these challenges by investing in climate change adaptation and resilience measures.
Hydro Ottawa, for example, recognizes the vulnerability of infrastructure to extreme weather and is taking steps to enhance its resilience . This includes modernizing distribution infrastructure, adapting planning and construction practices, and integrating climate considerations into long-term strategies.
The Current State of the Electricity Market in Ontario
Ontario’s electricity market is undergoing a significant transformation, driven by factors such as:
- Growing Demand: The Independent Electricity System Operator (IESO) projects that electricity demand in Ontario will increase by approximately 75% by 2050. This growth is driven by factors such as population growth, economic development, and the electrification of transportation, heating, and industrial processes.
- Electrification: The shift towards electric vehicles, heat pumps, and other electric technologies is increasing the demand for electricity.
- Renewable Energy Integration: Ontario is committed to increasing the share of renewable energy sources in its electricity mix . This includes expanding wind and solar power generation and supporting the development of other renewable energy technologies.
- Grid Modernization: Grid modernization initiatives are underway to improve the reliability, efficiency, and resilience of the electricity grid. This involves upgrading aging infrastructure, implementing smart grid technologies, and enhancing grid management systems.
- Climate Change: Climate change is increasing the frequency and intensity of extreme weather events, which can impact the electricity grid and infrastructure. Utility companies are investing in climate change adaptation and resilience measures to mitigate these risks.
Ontario’s electricity supply mix is currently dominated by nuclear energy (50.8%), followed by water power (24.5%), natural gas (12.5%), wind (8.7%), and solar PV (2.3%) . In addition to grid-connected generation capacity, Ontario also benefits from contracted embedded generation within local distribution systems.
By the end of the first quarter of 2021, there was 3,522 MW of contracted embedded generation in commercial operation, with solar power accounting for the largest share (61.7%).
The projected growth in electricity demand in Ontario necessitates increased generation capacity to ensure a reliable and affordable electricity supply . This highlights the importance of continued investment in new generation resources, grid modernization, and demand-side management programs to meet the province’s future energy needs.
Net Metering
Ontario’s net metering initiative allows customers who generate electricity from renewable sources, such as solar panels, to send excess electricity back to the grid for a credit toward their energy costs.
This program encourages the adoption of renewable energy and supports the province’s clean energy goals.

Hastings Utilities: A Key Player in Ontario’s Utility Landscape
Hastings Utilities Contracting Ltd. is an industry leader specializing in overhead and underground power line maintenance and construction in Southern Ontario.
The company is associated with quality work and guaranteed services, offering a knowledgeable staff and highly trained powerline technicians to provide exceptional service . Hastings Utilities has a remarkable safety record, demonstrating its commitment to safety even when undertaking complex and challenging projects.
Essential Services Offered by Hastings Utilities
Hastings Utilities offers a comprehensive range of services, including:
- High Voltage Power Line Construction & Maintenance: Hastings Utilities specializes in the construction and maintenance of high voltage power lines, ensuring the safe and reliable transmission of electricity.
- Lightning Construction, Repair & Maintenance: The company provides services for the construction, repair, and maintenance of lightning protection systems, safeguarding critical infrastructure from lightning strikes.
- Utilities Construction – Civil: Hastings Utilities offers civil construction services for electrical infrastructure projects, ensuring the proper installation and maintenance of underground and overhead power systems.
- Turnkey Engineering & Design Solutions: The company provides turnkey engineering and design solutions for utility projects, taking into account budgets, resources, risks, and schedules to ensure quality, efficiency, and safety.
- High Voltage Distribution Services: Hastings Utilities delivers high voltage distribution services, ensuring robust and reliable power infrastructure.
- Parks, Walkways, and Parking Lot Lighting: The company offers new lighting systems, redesigns, and maintenance for municipalities and public spaces.
- Pole Inspection and Asset Management: Hastings Utilities provides pole inspection and asset management services, ensuring the longevity and stability of wood poles.
- Pole Replacement and Relocation: The company can replace, remedy, or relocate damaged poles, ensuring efficient and safe power distribution.
- Power Restoration Services After Storms: Hastings Utilities has a proven track record of restoring power after major outages, ensuring communities can quickly recover from severe weather events.
- Underground Street Light Cable Locating Services: The company provides underground cable locating services, essential for excavation projects to prevent damage to underground utilities.
- Comprehensive Underground Fault Services: Hastings Utilities offers underground fault location and repair services, with experienced technicians providing on-site solutions and ensuring proper site restoration.
Hastings Utilities’ Contribution to Reliable and Sustainable Energy and Water Services
Hastings Utilities plays a crucial role in contributing to the reliable and sustainable delivery of energy and water services in Ontario. The company’s expertise in power line construction and maintenance ensures the safe and efficient transmission of electricity, supporting the province’s energy needs . Hastings Utilities also emphasizes safety and reliability in its operations for all utility contractor work, adhering to industry standards and minimizing risks .
Furthermore, Hastings Utilities is actively involved in utilities construction, covering a wide range of services that are essential for construction projects . This includes the installation and maintenance of electrical systems, water systems, and gas services, ensuring construction sites have the necessary utilities to operate efficiently.
Conclusion
Ontario’s utility sector is a dynamic and evolving landscape, with key players like Hydro One, Alectra Utilities, Elexicon Energy, Hydro Ottawa, and Toronto Hydro contributing to the province’s energy, water, and infrastructure. These companies are investing in grid modernization, renewable energy integration, and infrastructure projects to meet the growing demand for electricity and ensure a reliable and sustainable energy future for Ontario.
The electricity market in Ontario is facing several challenges and opportunities. The projected growth in electricity demand necessitates increased generation capacity and grid modernization to ensure a reliable and affordable electricity supply. The province is committed to increasing the share of renewable energy sources in its electricity mix, which requires continued investment in renewable energy technologies and grid infrastructure. Climate change is also posing challenges to the electricity grid, requiring utility companies to adapt and invest in resilience measures.
Hastings Utilities, with its expertise in power line construction and maintenance, plays a vital role in supporting these efforts and ensuring the safe and efficient delivery of electricity across the province. The company’s comprehensive range of services, commitment to safety, and involvement in utilities construction contribute to the reliability and sustainability of Ontario’s energy infrastructure. As the utility sector continues to evolve, Hastings Utilities is well-positioned to play an even greater role in shaping Ontario’s energy future.



