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CSO statistical release, , 11am

Domestic Metered Public Water Consumption

2018

Monthly Mean and Monthly Median 2014-2018
YearAverage (Litres per meter per day)Median (Litres per meter per day)
2014381246
2015384247
2016351249
2017357255
2018368255

Average water consumption increased by 3.1% in 2018

Figure 1 Domestic Metered Public Water Consumption by Decile, 2017 and 2018
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The average monthly consumption per meter per day in 2018 was 368 litres which was 3.1% higher than the 2017 figure of 357 litres (see Headline table). In 2018, the average consumption per month varied from 352 litres per meter per day in August to 402 litres per day in June (see Table 1). Additionally, the highest decile accounted for 38% of total consumption and had an average consumption of 1,407 litres per meter per day in 2018 (see Figure 1 and Table 2).

In contrast to average consumption, the median consumption per meter per day in 2018 of 255 litres was the same as in 2017 (see Headline table). The monthly median varied from 242 litres per meter per day in August to 279 litres per meter per day in June (see Table 1). Median consumption reflects typical levels of consumption more than average consumption as the median is less affected by meters with very high levels of water use due to leaks.

Table 3A shows the monthly average consumption per meter per day by county. Cavan had the lowest average consumption in 2018 at 308 litres compared with Roscommon which had the highest annual average of 421 litres. The corresponding medians are given in Table 3B.

Table 4A shows the average consumption by Dublin postal district. Dublin 5, at 292 litres per meter per day, had the lowest annual average daily consumption in 2018. Dublin 17 had the highest average daily consumption at 773 litres.

The CSO receives actual meter readings from Irish Water and converts them to monthly figures. Only meters with all days for a month are included in this release e.g. if the latest reading for a meter was on 28th December then the meter would not be included in the December data. The figures for a month do not make any allowance for families being away on holidays e.g. August.