Cardiff's Roath Park Lake regularly suffers from outbreaks of blue-green algae in summer which have become more frequent in recent years. These algal blooms are unsightly, toxic to dogs and humans, and can lead to the lake having to be temporarily shut. There are currently signs that an outbreak may be occurring there for the third summer in a row.
Nutrients in the water, such as nitrates, can contribute to the development of algal blooms and the council has employed strategies in the past such as reducing vegetation growing within the lake, and dredging it to remove build-ups of silt. The lake is currently starting to silt up at the north end near to Wild Gardens Road.
The council should investigate and implement the most effective strategy for preventing future algal blooms. Roath Park Lake is often recognised as the jewel in the crown of Cardiff's parks. The Labour-run council must invest to ensure it remains so, rather than continuing to neglect it.
[UPDATE - 23/06/20] It has recently come to light through a response to a Freedom of Information request that unauthorised sewage discharges into the lake and/or surrounding watercourse may be contributing to the problem. We are therefore demanding the council to works with Dŵr Cymru Welsh Water to address this as a matter of priority.
Please sign the petition below to put pressure on Cardiff Council to take action.
I/we, the undersigned, call on Cardiff Council to draw up and implement a long-term strategy to reduce the likelihood of future algal blooms in Roath Park Lake, as well as to dredge the lake to remove the build up of silt.