Extending the vent stack could help, says Bos. 6 things that should never go into your septic tank On the other hand, the ...

In a planning application submitted to Cornwall Council, the firm said private septic tanks had been identified as a source of the pollution, which could be affecting bathing water quality downstream.

The septic tank system at the park regularly spills raw sewage, causing a strong smell and issues with flies. Wyldecrest Parks said they had already spent more than £10,000 trying to fix the problem.