Up to a thousand fish are believed to have died after slurry leaked from a lagoon near the River Clwyd.
The leak was discovered at a farm in the Afon Bach in Tremeirchion on Friday. Restrictions on swimming at two beaches in Rhyl have now been lifted following water tests by Natural Resources Wales.
Denbighshire County Council had put signs in place warning people not to bathe nor allow children onto the beach – but samples taken later on Friday found that water quality had since improved.
Environmental officers are still at the scene of the leak to monitor the affected rivers and the farmer’s efforts to repair the damaged lagoon and prevent any further pollution. A ditch has been set up leading into the Afon Bach, a tributary of the River Clwyd with its mouth leading into Liverpool Bay at Rhyl.
Nick Thomas from NRW said: ”Our rivers and bathing waters are important to our local economy, so when pollution happens, it’s important that we act quickly to minimise the damage. Slurry can have a devastating impact on our rivers and the wildlife that depend on it, as we’ve seen here.”
”We continue to work with farmers, and the farming unions, to reduce the chances of incidents like this happening. Farmers concerned about their slurry stores should contact us for advice and guidance about how to reduce the risk of pollution.”