Your LDC is a monopoly company chosen by your address. It owns the physical infrastructure, sets nothing about the kilowatt-hour price, and is the only entity that can actually restore power at your house.
The poles, transformers, underground cables, smart meter and the service line into your house all belong to one of about 60 OEB-licensed distributors. Hydro One covers the rural province; large city utilities cover the rest.
The Ontario Energy Board approves each LDC's fixed monthly customer charge, distribution rate and pass-through transmission and regulatory charges through multi-year rate applications. The LDC cannot move these on its own.
You can switch from the default Regulated Price Plan to a licensed retailer's fixed-rate contract, and you can change RPP plan (TOU, Tiered, ULO) twice a year. You cannot change the LDC, the delivery rate or the meter.
The monopoly layer is structural. A street can have only one LDC because running two parallel sets of poles and wires would double infrastructure costs for the same homes. Every developed country handles distribution this way; Ontario simply has the OEB regulating instead of a single Crown utility.
Three beliefs about LDCs that cost Ontario households time and money:
None of these are silly mistakes. The split between commodity, delivery and regulator is genuinely confusing on first contact with the bill.
"I switched suppliers, so my delivery should drop."
It does not, and that is the most common retailer-pitch misunderstanding in Ontario. The delivery rate on your electricity bill is set by the Ontario Energy Board for your LDC. It is the same number whether you stay on the default Regulated Price Plan or sign a fixed-rate retailer contract. A retailer contract replaces only the commodity line of the bill, the per-kilowatt-hour rate for the energy itself. Delivery, transmission, regulatory and customer charges all flow through unchanged.
This is structural, not a marketing trick. Your LDC owns the physical poles and wires that bring electricity from the transmission grid to your meter. Those assets cost the same to run regardless of who you bought the kilowatt-hours from. The OEB calculates the delivery rate as the LDC's approved revenue requirement divided by its forecast volumes, and you pay it on every billed kilowatt-hour. No retailer in Ontario has ever moved that number, because no retailer has the legal standing to.
How LDCs are owned, structured and priced
Ontario's LDC landscape is a patchwork. There is one province-wide rural utility (Hydro One), a small group of large municipal consortia (Alectra, Toronto Hydro, Hydro Ottawa, Elexicon, Enova), several mid-size city utilities, and dozens of smaller town-owned utilities. The total has fallen from roughly 300 in the 1990s to about 60 today through OEB-encouraged consolidation.
Municipal
Owned by a city or town, often the legacy "Hydro" department spun off as a separate corporation in the early 2000s. Examples: Toronto Hydro, Hydro Ottawa, ENWIN.
Provincial Crown
Provincial government owns a majority share after the 2015 partial IPO. Serves rural Ontario plus the high-voltage transmission grid.
Investor-owned
Private shareholders, OEB-regulated like any other LDC. Examples include Cambridge and North Dumfries Hydro and a few small partnerships.
Indigenous-owned
A small number of First Nations communities run their own distribution, some connected to the grid and some on remote micro-grids.
Tariffs are set in one of two ways. A cost-of-service application is a one-year rebasing where the LDC files its full revenue requirement, capital plan and operating costs, and the OEB approves a new set of rates that take effect the following May. A Custom Incentive Regulation application is a longer commitment (typically four to five years) with a pre-set price escalation formula, productivity factor and earnings-sharing mechanism. Either way, the approved rate then applies until the next filing, and individual LDCs file at different times so customer charges across the province move on different cycles.
The size of your LDC matters more than most people realise. A small rural LDC with a few thousand customers spreads the cost of its substations and high-voltage interconnections across a much smaller volume base. That is why customer charges from Hydro One and small northern LDCs can be two to three times what Toronto Hydro charges on the same line.
Ontario's 10 largest LDCs by customer count
Ten LDCs cover roughly four out of five Ontario electricity customers. The other 50 or so utilities together serve the remaining fifth, mostly in smaller cities, towns and rural areas.
| LDC | Approximate customers | Service area | Ownership |
|---|---|---|---|
| Hydro One | ~1,500,000 | Rural Ontario, small towns province-wide (also owns the transmission grid) | Provincial Crown (partial IPO) |
| Alectra Utilities | ~1,100,000 | Mississauga, Brampton, Hamilton, Vaughan, Markham, Barrie, St. Catharines | Municipal (multi-city consortium) |
| Toronto Hydro | ~790,000 | City of Toronto | Municipal (City of Toronto) |
| Hydro Ottawa | ~360,000 | City of Ottawa, Casselman | Municipal (City of Ottawa) |
| Elexicon Energy | ~170,000 | Whitby, Ajax, Pickering, Belleville | Municipal (Veridian + Whitby Hydro merger) |
| Enova Power | ~160,000 | Kitchener, Wilmot, Waterloo North | Municipal (post-merger) |
| ENWIN Utilities | ~135,000 | Windsor | Municipal (City of Windsor) |
| Oakville Hydro | ~75,000 | Town of Oakville | Municipal (Town of Oakville) |
| Burlington Hydro | ~70,000 | City of Burlington | Municipal (City of Burlington) |
| Kingston Hydro | ~28,000 | City of Kingston | Municipal (Utilities Kingston) |
The five LDC confusions that come up most
From customer-service calls and OEB consumer-complaint summaries, the same five LDC misunderstandings come up over and over.
Your LDC owns the wires. A retailer (if you have one) sells you the kilowatt-hours. These are entirely different companies, with different bills, different complaint processes and different protections.
A few minutes searching "compare electricity distributors Ontario" tells most people what they need to know. There is no comparison to make: the LDC for your address is fixed by law.
The OEB regulates LDCs but does not operate any infrastructure. Outage reports go to the LDC operations centre, usually a dedicated 24-hour phone line or the LDC website.
A move from urban Toronto to rural Hydro One territory can mean $20-40 more per month in fixed charges before usage. People budget for the rent or mortgage; the LDC delivery jump catches them off guard.
When two LDCs merge (Alectra, Elexicon, Enova), the OEB usually ring-fences each predecessor zone for a transition period. Your delivery rate does not immediately move; the merged entity still bills your zone at the legacy rate until the next rebasing.
Find your Ontario electricity distributor
Pick the region of Ontario that best describes your address. The widget shows your most likely LDC, its ownership type and where to confirm on your bill. Most regions have one dominant LDC plus a few smaller utilities serving specific municipalities.
LDC finder
Pick the region that best matches your Ontario address.
Notes:
To confirm exactly: look at the top of your electricity bill. Your LDC's name and logo appear there, along with its 24-hour outage phone line.
Choose a region above to see your most likely LDC.
Indicative match by region. Boundaries are set by Ontario regulation and the OEB; this widget cannot replace looking at your actual bill.
The four pieces of your delivery line, and why they vary
"Delivery" on an Ontario electricity bill is not one charge. It is a combination of four OEB-approved components, each with its own logic and each capable of moving independently between LDCs.
A flat monthly amount that recovers the cost of the meter, the service line, billing and customer support. Varies sharply: small rural LDCs charge two to three times what a dense urban LDC charges.
The per-kilowatt-hour rate that recovers the LDC's local poles, wires and transformers. Approved by the OEB through cost-of-service or Custom IR applications.
Hydro One Networks (the transmission utility) charges this for the high-voltage grid. Your LDC passes it through with no markup. It is roughly the same across LDCs in the same zone.
A small line that funds the OEB itself, IESO operations and provincial conservation programs. Set centrally and identical across LDCs.
Electricity lost as heat in the wires between the transmission substation and your meter. The OEB approves a loss factor for each LDC that multiplies your billed consumption slightly upward (typically 3 to 7 percent depending on the LDC's network).
The piece that varies wildly between LDCs is the customer charge. A small rural LDC has thousands of customers spread over hundreds of square kilometres; an urban LDC has millions packed into city blocks. Both must recover the cost of the meter, the service line and the back-office. Per customer, the rural utility's cost is several times higher. The OEB-approved customer charge reflects that, and a Toronto-to-rural move can mean $20 to $40 more per month in fixed delivery alone before a single kilowatt-hour is consumed.
The other piece worth knowing is that the LDC owns your smart meter, not your retailer. The half-hourly consumption data that drives your time-of-use, tiered or ultra-low overnight billing is read, stored and transmitted by the LDC. The retailer (if any) receives an aggregated monthly figure from the LDC for billing purposes; they cannot see your real-time consumption and they cannot reprogram your meter.
What to actually do, in order
- Find your LDC. Pull out your last electricity bill: the LDC name and logo are at the top, and the 24-hour outage phone line is usually printed below the address. If you cannot find a bill, the regional widget above gives you a starting point.
- Set up an online account with your LDC. Every major LDC has a portal that shows 12 to 24 months of consumption history, lets you change your Regulated Price Plan choice (TOU, Tiered or ULO), and lets you opt into pre-authorized payments or equal-billing plans.
- Sign up for outage alerts. Toronto Hydro, Alectra, Hydro One and Hydro Ottawa all offer text or email notifications when an outage is logged in your area, with estimated restoration times. They are far faster than waiting on a phone hold during a storm.
- Save the LDC's outage line, not the OEB's. The OEB regulates the LDC but does not have field crews. Programme your LDC's 24-hour line into your phone now, before a storm.
- If you move within Ontario, check your new LDC. The customer charge change can be material. Hydro One's rural fixed charge is significantly higher than Toronto Hydro's urban fixed charge. Build that into your moving-cost forecast.
- Ignore door-to-door pitches that promise to lower your delivery charge. They cannot. Only the OEB can move that number, through the LDC's next rate filing.
The monopoly layer is where the structural rules live
Across the province, the LDC layer accounts for roughly a third to nearly half of a typical residential electricity bill, depending on consumption and location. It is also the layer where the choice has already been made for you. Where the commodity layer offers three Regulated Price Plan options plus the retailer alternative, and the regulatory layer offers programs like the Ontario Electricity Rebate and the Ontario Electricity Support Program, the distribution layer offers exactly one option: the LDC your address is in.
That makes the LDC the part of the system most affected by structural reform, not customer behaviour. The OEB has been consolidating LDCs for two decades, encouraging mergers where they reduce costs without harming local service. The count has fallen from roughly 300 in the 1990s to about 60 today. Alectra (a 2017 consortium merger) and the more recent Elexicon (2019) and Enova (2022) mergers show the direction of travel. Whether further consolidation lowers your bill depends entirely on whether the OEB requires the merged entity to share efficiency savings with customers in subsequent rebasing filings, which is a policy choice that quietly shapes the next decade of Ontario delivery rates.
The other structural shift is the slow rebuilding of the distribution grid for electrification. Heat pumps, electric vehicles and behind-the-meter solar push different demands onto the local wires. LDCs are filing for larger capital programs in their next rate applications. That flows directly into the delivery rates of the late 2020s. The household that ignores its LDC bill line today will find it harder to ignore three or four rebasings from now.
