About this swim spot
Llanishen Reservoir is a lake in Wales.
152 sewage discharges recorded within 5 km in the last 12 months, most recent 4 days ago — primarily Dŵr Cymru Welsh Water. 90 of those in the last 3 months. Last bathing-water sample at Llanishen Reservoir (0 km away): Excellent, 13 days ago (NRW). No swimmer hazard reports in the last 30 days.