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E-mail: environment@cso.ie Linh Nolan (+353) 1 4984209 John Golden (+353) 1 4984218
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CSO statistical release, , 11am

Domestic Metered Public Water Consumption

2016

YearNumber of metersAverage (Litres per meter per day)Median (Litres per meter per day)
2014497,238381246
2015771,348383246
2016691,453351249

Water consumption fell by 8.4% between 2015 and 2016

DMPWC 2016 HG
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The annual average consumption per meter per day in 2016 was 351 litres. This is an 8.4% decrease compared with the 2015 average of 383 litres (see Headline table and Table 6). On a monthly basis, the average consumption varied from 342 litres per meter per day in November to 358 litres in May (see Table 1). In 2016, the highest decile accounted for 37% of total consumption and had an average consumption of 1,310 litres per meter per day (see Figure 1 and Table 3). This is 21% lower than the 2015 average consumption of 1,665 litres per meter per day for the highest decile.

In contrast to average consumption, the median consumption per meter per day in 2016 of 249 litres was 1.2% higher than the 2015 figure of 246 litres (see Headline table and Table 6). The monthly medians varied from 246 litres in July and November to 258 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 annual total water consumption by domestic metered customers was accounted for by 99.1% of customers, using a consumption threshold of 1,000 litres per meter per day (see Table 2). The converse of this is that 0.9% of customers used 25% of metered water consumption in 2016.

Table 4A shows the monthly average consumption per meter per day by county. Cavan had the lowest average consumption in 2016 at 298 litres compared with Offaly which had the highest annual average of 398 litres. The corresponding medians and number of meters are given in Tables 4B and 4C.

Table 5A shows the average consumption by Dublin postal district. Dublin 20, at 274 litres per meter per day, had the lowest annual average daily consumption in 2016. Dublin 24 had the highest average daily consumption at 569 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. 

 

AverageMedian
< 1,000270243
< 5,000304245
< 10,000317246
Total (no threshold)351246
Table 1 Domestic Metered Public Water Consumption by Month, 2016
MonthNumber of metersAverage daysTotal consumption (Cubic metres)Average (Litres per meter per day)Median (Litres per meter per day)
January657,336317,205,147354247
February658,493296,720,586352247
March658,581317,162,013351249
April659,588307,004,961354253
May671,294317,444,920358258
June671,326307,089,923352251
July669,820317,261,723350246
August678,439317,382,347351247
September678,211306,990,569344247
October677,044317,403,715353248
November685,188307,033,871342246
December684,533317,400,100349253
      
Total691,45335586,099,876351249
Table 2 Domestic Metered Public Water Consumption by Threshold Level, 2016
Threshold LevelNumber of metersTotal consumption (Cubic metres)Average (Litres per meter per day)Median (Litres per meter per day)
Total (all meters)691,45386,099,876351246
     
< 1,000 litres per meter per day685,07964,715,752270243
< 5,000 litres per meter per day690,26274,309,897304245
< 10,000 litres per meter per day690,89077,816,535317246
Table 3 Domestic Metered Public Water Consumption by Decile, 2016
DecileNumber of metersTotal consumption (Cubic metres)Average (Litres per meter per day)
1st69,1451,098,77946
2nd69,1452,704,368111
3rd69,1473,864,981157
4th69,1444,867,158198
5th69,1465,836,929237
6th69,1476,838,254277
7th69,1447,970,193322
8th69,1459,380,928379
9th69,14511,586,887469
10th69,14531,951,3991,310
    
Total691,45386,099,876351
Table 4A Domestic Metered Public Water Consumption by County and Month, 2016 (Average)
Average consumption in litres per meter per day
CountyJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberTotal
Carlow349354360369366353350347343343345350352
Cavan287291294296311301299304300299293298298
Clare321320323332331334328335321316315319325
Cork382376372376380380369372365365360367372
Donegal299298300299303302307307298293294303300
Dublin371367360365370357356357348355340349358
Dublin postal districts353352349358356345345349342376343346351
Galway388387384380392386380376378376372371381
Kerry359355356358351357361370352349345352355
Kildare350350348347356349361341337363337344349
Kilkenny338332333335341348348352338337331347340
Laois382380379379389383380381379379384393382
Leitrim304321325327333319310315299294297311313
Limerick330333329336338336323329335333327332332
Longford415403403398396387378373376376367382388
Louth354349349353363354353351346346345352351
Mayo312311309306314316311319307316315322313
Meath358356359362364352345346344346343354352
Monaghan299309311317321306291300297301300301304
Offaly408407409399405400386391388390391405398
Roscommon352350364352365362357353342353354362356
Sligo312316318328329324324329317320311323321
Tipperary362359362362362366361365359361367374363
Waterford348347344341347343343349326327327337340
Westmeath369374371375383383379375371373372382376
Wexford306306311309310314324325303300300306310
Wicklow347343346346356345342348335335345346345
              
Total354352351354358352350351344353342349351
Table 4B Domestic Metered Public Water Consumption by County and Month, 2016 (Median)
Median consumption in litres per meter per day
CountyJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberTotal
Carlow248250251255255250251250253253252254252
Cavan222222225225236229222224223225221229225
Clare217216222226230230228234220221218225224
Cork252253254259264260250254252255250256255
Donegal199198204205209206213215202203202206205
Dublin271271270276282270261263269270268278271
Dublin postal districts251252251257260249243244249252250256251
Galway250251250256260255248247252253249248251
Kerry211211218220227227234236218220215223222
Kildare269268270274280271261262265268265273269
Kilkenny237238243244250250245248241241240247244
Laois262263267266274269264263265265266272266
Leitrim187185190195192194195198186186190195191
Limerick234239241244249241226231241241238245239
Longford234234238240247242235238238237233243238
Louth248249253255259254250251249250249256252
Mayo203201206206212213208213203207205213208
Meath278278281285290280272273276277275284279
Monaghan224230230231235233223230225226223234229
Offaly265264269269274270263264263264263273267
Roscommon219220224225234232227225223224221231225
Sligo198201205207211207208212204209204210206
Tipperary235235242244250248242245240241238246242
Waterford239239241242250250251257240239235243244
Westmeath244243250253259252247246247246241248248
Wexford209209215216221223230230214214212217218
Wicklow261260264264273264265260257258254264262
              
Total247247249253258251246247247248246253249
Table 4C Domestic Metered Public Water Consumption by County and Month, 2016 (Meters)
Number of meters
CountyJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberTotal
Carlow9,3069,3189,3149,3359,5549,5569,5409,5999,5939,5799,7449,7319,809
Cavan8,4848,4838,4818,4748,5688,5658,5518,5528,5498,5228,7138,6998,797
Clare18,30318,31118,30418,33718,38718,36818,35018,34918,33818,30818,44418,41118,627
Cork68,75968,90068,91468,91773,03373,01972,87673,85873,83273,72774,88074,83075,845
Donegal12,01512,04712,04412,04812,17812,17512,14212,15012,14512,10612,09112,05712,254
Dublin55,45155,48255,47555,54055,84255,83755,66556,23256,15656,14556,50656,49756,706
Dublin postal districts133,544133,594133,579133,749134,512134,513134,074135,566135,647135,390136,097135,779136,847
Galway26,51826,64326,65226,63629,00728,97028,93329,45629,42429,37530,42430,41130,799
Kerry18,82518,87618,86618,94219,16019,15719,12719,64019,62819,57220,46520,43420,738
Kildare45,48945,59245,59645,64246,00446,00845,78646,51046,49146,46347,40347,39947,660
Kilkenny10,14910,16310,15710,19310,54410,54510,53810,61010,59910,57110,59310,59210,687
Laois13,94813,97413,97813,99114,22314,22514,20614,21414,21414,17514,19514,19114,341
Leitrim4,9164,9554,9564,9565,0145,0134,9954,9934,9814,9554,9404,9345,057
Limerick25,63625,65025,65125,69825,69125,68525,65326,11426,10826,08226,51826,50626,816
Longford5,5635,5875,5855,5735,6415,6335,6215,6275,6245,6135,7215,7175,795
Louth23,00923,02823,02023,03223,11423,10923,08823,22423,22123,19923,20523,19323,373
Mayo16,20516,22816,23216,26516,39116,38616,33716,52916,52416,46916,57516,56116,897
Meath33,98734,01334,00834,13734,32034,31834,27635,15635,16235,12535,51935,49035,711
Monaghan5,5245,5265,5255,5155,6195,6205,6065,6105,5995,5855,6315,6265,690
Offaly10,41310,44210,44510,46710,92410,92710,91810,97810,97510,92510,93910,93211,066
Roscommon7,5167,5377,5377,5457,6337,6337,6287,7607,7487,7007,7567,7507,925
Sligo10,46910,48810,48910,52310,71410,71010,67710,67010,66210,61010,59410,58610,780
Tipperary22,17222,19522,18222,17622,46822,46922,43422,69822,68022,60622,82022,80323,139
Waterford12,79012,84812,84512,83212,90212,90612,89413,33913,33813,31313,41713,40513,528
Westmeath14,35414,36914,35914,37114,41914,41714,39614,42114,41714,44415,05715,04015,192
Wexford23,36923,59223,73624,03124,37724,50124,45824,52924,50124,44424,85924,82225,137
Wicklow20,62220,65220,65120,66321,05521,06121,05122,05522,05522,04122,08222,13722,237
              
Total657,336658,493658,581659,588671,294671,326669,820678,439678,211677,044685,188684,533691,453
Table 5A Domestic Metered Public Water Consumption by Dublin Postal District and Month, 2016 (Average)
Average consumption in litres per meter per day
Dublin Postal DistrictJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberTotal
Dublin 01318303300315313323321323314328324302316
Dublin 02412422416418430407411412423414400389413
Dublin 03385382372376383375370385362428371375380
Dublin 04429417414429434415399401410409400395413
Dublin 05307302305309312290329351284359284289310
Dublin 06454456446468476463445456457452469455458
Dublin 06W326322317323330318312313319319318323320
Dublin 07331326328342330324332330328334332334331
Dublin 08409412387421429401406411416408408398409
Dublin 09328328322329327319332335318362323327329
Dublin 11373380391428387382376375366374360364380
Dublin 12308302290296291283282284284285287287290
Dublin 13382365368345345339355382360384370363363
Dublin 14358359352373362346336334335333331340346
Dublin 15342345347359354348344347346454349353358
Dublin 16328326323322324314310310306306303313315
Dublin 17494482481428392386376363393447390396419
Dublin 18382386383375374363358362362358353359368
Dublin 20269269272274281275277276274272271279274
Dublin 22454430435439445424403415413417422427427
Dublin 24733626567578581548493480485491625643569
              
Total353352349358356345345349342376343346351
Table 5B Domestic Metered Public Water Consumption by Dublin Postal District and Month, 2016 (Median)
Median consumption in litres per meter per day
Dublin Postal DistrictJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberTotal
Dublin 01226221222223234213227228224249238213227
Dublin 02201222216224225206203206230221219203215
Dublin 03244243239245248240233232236246240245241
Dublin 04245249244252256242233230239244246244244
Dublin 05223224225229235224225225221225222229225
Dublin 06261264256266276257244244257262264261259
Dublin 06W244245244250255247239238244243243251245
Dublin 07218220221229217211215215217221219216218
Dublin 08213215212220220208197200199203208197208
Dublin 09224227226230233225224221222228226227226
Dublin 11243240241250252240238237240243243248243
Dublin 12210212213218220213211205207207211213212
Dublin 13258259262264266261256258253255252266259
Dublin 14250253249256261247241243250250251257251
Dublin 15281282282291289280269270279286284289282
Dublin 16265263262266273261254257261258256269262
Dublin 17244251278272275293286265238241251246261
Dublin 18286283283288293278265271282283280290282
Dublin 20223224226229235227229226227224225233227
Dublin 22253246248246257245247254250252252259251
Dublin 24284286269277285269276257269268274269272
              
Total251252251257260249243244249252250256251
Table 5C Domestic Metered Public Water Consumption by Dublin Postal District and Month, 2016 (Meters)
Number of meters
Dublin Postal DistrictJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberTotal
Dublin 01114114114118123123122122121121121121123
Dublin 02232232232235236236235236236233233233237
Dublin 036,9756,9806,9806,9857,0167,0146,9536,9526,9816,9716,9946,9777,042
Dublin 046,1556,1616,1606,1756,1966,1946,1896,2226,2216,1956,3106,3086,364
Dublin 058,3968,3978,3978,4448,4848,4848,3358,3158,3348,3598,5048,5038,520
Dublin 066,4766,4866,4856,4826,5586,5576,5486,5986,5976,5826,5886,5856,650
Dublin 06W7,1337,1337,1367,1427,1697,1687,1647,1827,1817,1767,1807,1787,207
Dublin 0710,52510,53010,52510,53410,61310,61410,59710,63510,62810,62110,63410,63010,690
Dublin 081,1641,1641,1651,1621,1921,1911,1901,1981,1971,1931,1961,1941,206
Dublin 0912,54512,54612,54412,57212,59212,59112,49912,50612,52912,54112,59112,57212,629
Dublin 114,3824,3854,3854,3884,3934,3924,3874,4154,4174,4104,4164,4154,430
Dublin 122,9642,9652,9662,9702,9712,9682,9663,0093,0093,0073,0093,0073,019
Dublin 133,0313,0383,0383,0433,0453,0453,0293,0493,0503,0503,0653,0633,082
Dublin 1411,40311,40011,39611,40611,47111,47511,46411,53011,53111,51511,51911,51711,572
Dublin 1526,09026,09526,09126,12126,37626,38226,32627,15727,17326,99727,27827,02027,533
Dublin 1613,35813,35713,35413,36213,38813,38813,38413,44413,44313,43113,44113,43913,477
Dublin 1786868686868686868686868686
Dublin 188,7128,7168,7158,7088,7878,7898,7868,9408,9428,9308,9588,9578,997
Dublin 202,7462,7472,7472,7542,7542,7542,7532,7532,7532,7532,7532,7522,756
Dublin 22704707708708709709709799800800801801803
Dublin 24353355355354353353352418418419420421424
              
Total133,544133,594133,579133,749134,512134,513134,074135,566135,647135,390136,097135,779136,847
Table 6 Domestic Metered Public Water Consumption, 2014-2016
YearNumber of metersAverage daysTotal consumption (Cubic metres)Average (Litres per meter per day)Median (Litres per meter per day)
2014497,23813826,074,257381246
2015771,34831492,926,702383246
2016691,45335586,099,876351249

Background Notes

 Introduction

The data used to compile this release were received by the CSO from Irish Water in response to a request made under the Statistics Act, 1993.

Revisions

All figures are subject to revision. Water meters can store data for previous readings and they are typically read using drive-by technology. Not all meters may have been read for the full release period e.g. if the last data collection for an area was done during December then data for December will not be available until the meter is read again and the data are made available to the CSO. Therefore a full year's data may not be available for some meters.

Thresholds

Table 2 in the release examines the impact of using consumption thresholds to exclude data that are unusually high. These thresholds show the substantial impact that high usage has on the average consumption figures. Typically, high consumption is due to a leak.

Median

The difference between the average and the median gives an indication of the extent of high consumption as the median is less influenced by the small number of meters with very high consumption. In Table 2 the median is calculated from annual 2016 data for a meter whereas in Tables 1, 4B, 5B and 6 it is calculated from monthly data.

Coverage

The data used in this release only cover metered usage. Apartments, many group water schemes, and abstractions from wells are not included. The 2016 data are based on 691,453 meters. Data from meters are included provided a full month’s data could be calculated from the meter readings. Some meters may not have been read during 2016.

Methodology

Irish Water provided monthly files of meter readings to the CSO. The files contained both meter readings and derived consumption data. The dates of the meter readings are generally from a date that is at the end of the month but readings can also occur on other days of the month and in some cases a meter may not have been read in a particular month.

In a small number of cases, a meter was read more than twice in a month. In these cases the CSO has used the first and last readings in a month to calculate monthly consumption.

Meter readings that were irregular in the series, e.g. readings lower than previous readings, have been excluded. Before excluding any readings, the CSO has examined in detail the series of readings for meters where there was a decrease of 500 cubic metres or more between two readings. The higher reading was excluded if it was the irregular reading in the series.

The CSO has converted the readings into monthly usage figures by allocating the difference in two readings proportionately between the dates that the meters were read. Months with partial data have been excluded e.g. if the last reading for a meter was during December, and there were no meter readings available yet from the following year, then that month was excluded.

Measurement units

The meter readings are in cubic metres. One cubic metre equals one thousand litres. The readings in cubic metres have been converted to average and median consumption in litres per meter per day. In Table 1, the data were converted into average and median consumption per meter per day in each month.

County data

There was a relatively small number of meters installed in Dublin 17 and Dublin 24. No meter data were available for Dublin 10.

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