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Hydro One delivers electricity safely, reliably and responsibly to homes and businesses across the province of Ontario. Hydro One Networks is involved in the planning, construction, operation, and maintenance of the company's transmission and distribution network.

This transmission system carries electricity from generating stations to local distribution companies and large industrial customers through our high-voltage network of transformer stations, transmission towers and wires.

Hydro One owns 97% of transmission towers in Ontario with almost 30,000 kilometres of high-voltage transmission lines. Hydro One's distribution network is the largest in the province, with almost 123,000 kilometres of wires.