Another case of pollution has been reported in the Teifi Valley – just weeks after the last.

Last month Teifi River guide Harry Jackson called for heavier fines to be meted out on farmers who polluted waterways.

His comments followed an incident near Cilgerran which saw up to 120,000 gallons of slurry end up in the Afon Dyfan, a tributary of the Teifi.

Now, Natural Resources Wales officers are investigating another possible pollution incident on the River Plysgog, near Cilgerran, which, according to reports on social media, resulted in the deaths of an unknown number of fish last week.

Rod Thomas, senior environment officer for Natural Resources Wales, said they had received the report on Thursday.

“Protecting Wales’ rivers is one of our biggest priorities so its important pollution is dealt with as quickly as possible,” he added.

“Our officers attended the site yesterday afternoon to look for signs of pollution and to take water samples, and are out again today to assess the impact on the river and wildlife and to look for the source of the pollution.

“As our investigation continues we thank the local people who reported this to us and urge that further signs of pollution is reported to us on 03000 65 3000.”

Giving his reaction to this latest incident, Mr Jackson said: "Something has got to be done about this, it’s absolutely disgusting - but NRW don’t have any teeth.

“I don’t know yet whether this is the result of an accident or whether some farmer just let it go into the river.

“At this time of the year rivers are really low – they’re now at summer levels of water.

“I’m afraid this means that the damage to fish life caused by such spillages will be that much greater.”