Biennial reports on reservoir safety

Natural Resources Wales is the enforcement authority for the Reservoirs Act 1975

In this section


There are over 350 regulated reservoirs in Wales and it is our responsibility to make sure that the law is complied with to keep these dams safe.

The law requires us to report to the Welsh Minister every two years on what we have done as the enforcement authority to ensure reservoir undertakers observe and comply with the law and also to report on what we have done to ensure the safety of reservoirs for which we are the undertaker.

Contact us

We welcome feedback on our report and this should be emailed to

Related document downloads

Reservoir Safety 2013-15 Biennial report PDF [744.6 KB]
Reservoir safety 2015-17 Biennial report PDF [941.2 KB]
Reservoir safety 2017-19 Biennial report PDF [1.2 MB]