The Environment Minister has announced a grant scheme of up to 4000 euro for households whose septic tanks require upgrading.
Inspections will begin in the new year - and properties whose waste treatment systems have registered - and fail the inspection - will be eligible for a grant.
Homeowners will have to register their septic tanks by February first in order to qualify for a grant, and inspections are being carried out on unregistered properties also.
To date 290,000 people or 58 percent of those with septic tanks have registered their systems.
Deputy Dinny McGinley says there hasn't a high level of registration in Donegal but hopes the grant will change that: