The Environmental Protection Agency’s most recent Remedial Action List shows a reduction of eight in the number of water supply schemes in Kerry.
By 2021 the utility aims to reduce the number of schemes on the Remedial Action List to zero.
This includes the amalgamation of seven of these schemes into the Lough Guitane water supply zone as part of an overall plan to improve the quality of water treatment for the entire mid-Kerry region.
Irish Water is currently developing a new water treatment plant in Lough Guitane to serve over 62,000 people in mid-Kerry.
It says this project is on schedule and will be completed by mid-2018.
In addition to this, the utility is also working on a €4.5m project to upgrade the water treatment plant in Kenmare.
The treatment plant at Templenoe has been decommissioned and the supply has been connected to Kenmare.
Upgrade work has also been carried out at the Kilgarvan, Lauragh and Mountain Stage water supplies.
It is intended that these works will facilitate the removal of these schemes from the RAL, subject to approval of the EPA.
The Lyranes water supply zone has been added to the list due to inadequate treatment for cryptosporidium.
To address this, a plan has been put in place to install ultraviolet filters at this plant, which treats water for a population of 73 people.
Earlier this year, the completion of work at the Waterville water supply scheme, which serves 2,100 people, led to its removal from the list.
A number of water supply schemes in Kerry remain on the list due to the presence of Trihalomethanes.