That includes its reservoirs in & Ballymore Eustace and Leixlip.
ESB is again issuing a warning about swimming in its Kildare water courses.
Its in light of the warm weather.
ESB operates the Golden Falls reservoir in Ballymore Eustace, another in Leixlip, and Poulaphouca, just over the border, in County Wicklow.
It says it would like to " remind the general public of the dangers and potentially serious consequences of swimming in any ESB reservoir."
It adds "These areas are not appropriate for swimming because of the risk of deep and fast-flowing waters, changing water levels and uneven ground."

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