Nearly 100,000 Irish households could face a new water charge from 2019

Households found to be using an 'excessive' amount will be hit with a bill in just over 18 months, and one-in-14 households can expect to pay.

The Commission for Regulation of Utilities (CRU) has revealed the amount of water which each of Irish Water's 1.35 million domestic customers will be allowed to use before paying a charge.

In a report to government, it says that an 'average' household of four people uses 125,000 litres of water a year, which falls to 47,000 litres for a single-person home. Families that consume 1.7 times the average will be charged.

The tariff will be decided following a public consultation exercise next year. However, based on current tariffs of €1.85 per 1,000 litres of drinking water and €1.85 per 1,000 litres of wastewater, a household which consumes twice the average - or 250,000 litres a year - could face a levy of €68.45 a year.

The report came after the Dáil Committee on the Future Funding of Domestic Water Services recommended that charging for excessive usage would demonstrate Ireland was complying with EU rules aimed to improving water quality.

The analysis was based on metered data from 475,000 households.