Tests have confirmed that bright orange-coloured water observed at several beaches in north Wales is caused by a harmless marine algae, not sewage or pollution. The algae, known as Noctiluca or 'sea sparkle' for its ability to glow in the dark, has been found at Penmaenmawr beach in Conwy and in Llandudno, with potential presence in other areas.
Natural Resources Wales (NRW) conducted tests on the orange water and determined it to be the early stages of Noctiluca marine algae, which poses no harm to humans. Richard Berry of NRW explained that the appearance, though unappealing, is a natural phenomenon common during warm weather periods.
Berry stated: 'Over the last few weeks we've had lots of reports in about material in the sea which is often mistaken for sewage or pollution, but is in fact marine algae. It might not look pleasant, but it is a natural process and very common at this time of year and particularly during warm periods of weather.'
NRW confirmed that the algae is not causing any environmental impact at present, but they will continue to monitor sea conditions. Members of the public who suspect pollution that is not marine algae are urged to report it to NRW's incident hotline on 0800 80 70 60.
