An Environmental Protection Agency report has found that 11 private water supplies in Cavan were not monitored for e-coli last year.
The EPA has analysed the quality of private supplies across the country – saying they’re much poorer than public sources.
The watchdog says the dangerous bacteria E coli was found in 62 supplies in 2018.
Nationally, more than 1,000 people got a dangerous infection from drinking contaminated drinking water last year.
Speaking on The Wider View, EPA inspector Michelle Minihan (PRON: Moynihan) said the local authority is responsible for monitoring the water supply, but that the authority needs to be informed of the private supply.
Michelle Minihan had this advice for businesses and commercial premises which use private supplies: