The areas are not safe for swimming because of changing water levels and uneven ground.
The ESB has warned of the dangers of swimming in the waters at the reservoirs of Poulaphouca, Golden Falls and Leixlip.
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.
Ahead of the June bank holiday weekend and with the improving spell of warm weather over the summer months, ESB is reminding the general public of the dangers and potentially serious consequences of swimming in any ESB reservoir.
These waters include the reservoirs at Poulaphouca in County Wicklow, Golden Falls and Leixlip in County Kildare.
Other waters include Inniscarra and Carrigadrohid in County Cork, the Ardnacrusha headrace and tailrace canal in County Clare and Assaroe, Lough Nacung and Lough Dunlewey in County Donegal.

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