Advisory issued in advance of the bank holiday weekend.
ESB is advising of the dangers and "potentially serious consequences" of swimming in any of its reservoirs, its two Kildare facilities.
It says "These areas are not appropriate for swimming because of the risk of deep and fast-flowing waters, changing water levels and uneven ground."
The utility has a reservoir in Leixlip and hydro-electric plant at Golden Falls, in Broadleas, as well as reservoir in west Wicklow, at Poulaphouca.
ESB says it "would also like to remind the general public who use our lands for leisure activities such as fishing and walking to adhere to current social distancing guidelines."

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