Over a fifth of septic tanks inspected last year were a risk to human health or the environment.
The Environmental Protection Agency says over 800 tests were carried out by local authorities in 2020, 54% of which failed.
In Donegal, 60 tests took place, with a failure rate of 30%.
Between 2013 and 2020, 231 tanks failed inspections, of which 89% were fixed, against a national average of 76%.
Noel Byrne, from the EPA, says there’s a danger to public health in some cases……….
