Water pollution and recreational waters
The Environment Agency (link opens in new window) is responsible for maintaining or improving the quality of fresh, marine, surface and underground water in England and Wales. They aim to prevent or reduce the risk of water pollution wherever possible, and to ensure that it gets cleaned up if pollution occurs that might lead to effects on people or ecosystems.
Although the Environment Agency have overall responsibility for recreational waters, in instances where blooms of blue / green algae grow, we respond to protect public health by notifying the public. This is usually done by placing signs at any affected water body warning of the dangers of swimming in / using such waters.
Further information (link opens in new window) on blue / green algal blooms and the health effects of blooms of this nature.