The EPA have found 57% of 65 failing systems have been resolved since 2013.
Westmeath has one of the worst track records when it comes to tackling defective septic tanks.
Just 57% of the 65 failing systems identified by the local authority in county have been resolved since 2013, according to a new report by the EPA.
Only Cork City has a worse record at 29%
The figure in Offaly is 93%, while it's 76% in Laois.
EPA Project Manager Noel Byrne says homeowners have to step up:
GlowDepot The New Late Night City In The Woods For Electric Picnic
Fishtown Reveals Lineup For Electric Picnic
Gardaí Attend Scene Of Three Vehicle Crash
Colin Farrell Rumoured To Be Part Of Star Filled Production In Offaly
Offaly Athletics Club Pushing To Raise €400k For New Olympic Sized Track
Offaly Community Hopeful Of Town Hall Reopening By 2030
Hospital Parking Charges Rise By Over €10m
Road Haulage Association Calls For Fuel Support Extension