Hydro — Canadian "electric hookup"

In Canada, "hydro" is the everyday word for electricity at a campsite — the electric hookup. It comes from the historical dominance of hydroelectric utilities (BC Hydro, Hydro-Québec, Hydro One) and is used on signs, in reservations, and in campsite descriptions.

Typical Canadian campsite hookup levels: 15 A (basic), 30 A (most common), 50 A (large rigs). Outlets are usually NEMA L5-30 / TT-30 for 30 A and NEMA 14-50 for 50 A — same as the US. A "site with hydro" simply means a powered site; "no hydro" means dry camping. Often combined with water and sewer in a "fully serviced" site.