Under the Water Services Acts, it is the responsibility of the property owner to ensure that their Domestic Waste Water Treatment System (DWWTS) is fit for purpose, operational and kept in good order.
My Department's Rural Water Programme provides financial assistance to households in specific circumstances where capital works are required to rectify defective DWWTS to protect human health and the environment. The terms and conditions of the grant schemes are available on my Department’s website at this link:
www.gov.ie/en/publication/6cc1e-domestic-waste-water-treatment-systems-septic-tanks/
Each local authority has appointed a Rural Water Liaison Officer (RWLO) who deals with the day to day implementation issues for the grant schemes. The RWLO can be contacted at the Rural Water Section of the relevant local authority - Cavan County Council in this instance.