|Year||Number of meters||Average (Litres per meter per day)||Median (Litres per meter per day)|
The annual average consumption per meter per day in 2017 was 359 litres. This is a 2.3% increase compared with the 2016 average of 351 litres (see Headline table and Table 6). On a monthly basis, the average consumption varied from 349 litres per meter per day in February to 369 litres in May (see Table 1). In 2017, the highest decile accounted for 37% of total consumption and had an average consumption of 1,340 litres per meter per day (see Figure 1 and Table 3). This is 2.3% higher than the 2016 average consumption of 1,310 litres per meter per day for the highest decile.
In contrast to average consumption, the median consumption per meter per day in 2017 of 256 litres was 2.8% higher than the 2016 figure of 249 litres (see Headline table and Table 6). The monthly medians varied from 250 litres in August to 267 litres in May (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.
Around 75% of the total annual domestic metered water consumption was accounted for by 98.8% of customers, using a consumption threshold of 1,000 litres per meter per day (see Table 2). Conversely, 1.2% of customers were responsible for 25% of metered water consumption in 2017.
Table 4A shows the monthly average consumption per meter per day by county. Cavan had the lowest average consumption in 2017 at 298 litres compared with Offaly which had the highest annual average of 419 litres. The corresponding medians and meter numbers are given in Tables 4B and 4C.
Table 5A shows the average consumption by Dublin postal district. Dublin 20, at 293 litres per meter per day, had the lowest annual average daily consumption in 2017. Dublin 24 had the highest average daily consumption at 564 litres.
|In the interests of completeness, figures for Dublin 17 and Dublin 24 have been given in Tables 5A-5C. However, users should note that data were available for only a small number of meters in both of these districts. No meter data were available for Dublin 10.|