Clevedon Marine Lake is a much-loved community asset. Lake users can follow six simple steps to help keep the water quality good in the lake:
No dogs lakeside.
Use the public toilets next to the arcade.
Use crabbing bait like bacon sparingly and clean up any scraps.
Not swim when unwell.
Use the drinking tap and freshwater shower adjacent to HM Coastguard Clevedon rescue station.
Drop £1 in one of the donation boxes every visit, to help pay for water quality testing and lake care.
During the warm summer months, when the lake is heavily used, the water quality in Clevedon Marine Lake is sampled before and after each series of overtopping tides (approximately those over 12.5m) to provide a baseline health check. The test results are shared to allow lake users to make an informed decision about entering the water.
Poor bathing water quality test results occur from time to time. The causes include:
A prolonged warm spell. Although UV in sunlight kills off harmful bacteria, it is only effective at surface level where the light can penetrate.
Heavy usage stirring up sediment from the lakebed.
Heavy rainfall causing run-off into the Severn Estuary, entering the lake on overtopping tides.
Contamination from human or dog waste.
Clevedon Marine lake is a semi-natural environment. It is a living space filled by sea water from the Severn Estuary. Faecal coliforms are present all around us and inside us. They live in our gut. Mammals (including humans), fish and birds produce them all the time. Faecal coliform bacteria can enter aquatic environments through direct discharge of waste from these species, from agricultural and urban storm runoff, and from human sewage.
There is a year-round ‘NO DOGS’ order in place at Clevedon Marine Lake and the splash pool for public health protection, to reduce the risk of unfriendly bacteria draining into the lake. A single gram of dog waste can contain millions of faecal coliform bacteria, known to cause cramps, diarrhoea, intestinal illness, and serious kidney disorders in humans. Faecal coliform bacteria can also present as eye or ear infections.
Updates on the water quality in Clevedon Marine Lake are shared here. If a poor result is reported, it is recommended that the public do not swim in the lake until the water has refreshed and been retested. People may choose to use the lake at their own risk in the meantime. Any swimmers doing so are advised to wear ear plugs and goggles to protect against infection. All visitors having contact with the lake water are advised to wash hands before eating.
In addition, the water quality in the Severn Estuary, which refills the lake, is monitored regularly by the Environment Agency throughout May to September, with samples taken from Clevedon Beach adjacent to Clevedon Marine Lake. Poor water quality warnings are issued on-line – and the most recent water quality test results also can be checked.