Facility Water Leakage: Measuring the Loss and Pricing It Under UAE, Oman and Saudi Arabia Water Tariffs

A cost screen for facility water leakage built from EPA's leak-share and water-audit benchmarks, an illustrative loss priced under each country's own water tariff, and the measurements a site needs before funding repairs.

Decision question: How much of a facility's water bill is realistically exposed to leaks, and what should be measured — the facility's own water-loss share, its billing category and its own water tariff — before funding a water leak-detection-and-repair programme in the UAE, Oman or Saudi Arabia?
Audience: Facilities manager, maintenance manager or plant engineer operating a commercial or industrial facility in the UAE, Oman or Saudi Arabia, deciding whether to fund a water leak-detection-and-repair programme
Geography: UAE, Oman, Saudi Arabia
Sector: Industrial operations, Facilities management, Commercial buildings
Theme: Energy, Water & Resource Efficiency
Series: BARZ Operational Performance Briefs

Decision question and audience

Water is metered, billed and usually assumed to be used productively — until a facility's bill rises without an obvious reason. A facilities manager, maintenance manager or plant engineer running a commercial or industrial site in the UAE, Oman or Saudi Arabia is regularly asked to judge whether a leak-detection-and-repair programme is worth funding, without a clear answer to the question that justifies the spend: how large is the leak exposure likely to be, and what would it actually cost under the water tariff that applies to the site? This brief sets out what a U.S. water-efficiency programme's technical guidance says about leaks' typical share of a facility's water use and how to measure it, prices an illustrative share of water loss against each country's own published water tariff, and states what a site must measure — its own water-loss share, its billing category and its own tariff — before committing to a programme.

Executive summary

A widely used U.S. water-efficiency benchmark holds that leaks account for 6 % [1] of a facility's total water use on average, and that they "can be the greatest source of water waste within a facility" — a general finding, not a measurement of any specific site. Applying that share to an illustrative facility's assumed annual water consumption gives an illustrative 300 m³ of water exposed to leaks every year. Priced at each country's own water tariff, that illustrative volume comes to 3,036 AED in Dubai (DEWA), 396 OMR in Oman and 2,400 SAR in Saudi Arabia — one identical assumed volume, priced at three tariffs that are not fully comparable in timing: the Saudi figure is a rate the National Water Company has reported for 1 January 2027, not yet in force at this brief's publication date, while Dubai's and Oman's rates are both already in force (Limitations below). These three figures illustrate scale, not a cross-country ranking. The numbers that actually matter — a site's own metered water-loss share, its billing category and its own tariff — have to come from the site itself.

Evidence and methodology

The leak-share benchmark comes from the U.S. Environmental Protection Agency's WaterSense program, a voluntary water-efficiency labelling and guidance programme, read directly from the Agency's own hosted fact sheet [1]. It is a general U.S. programme statement, not a GCC-specific survey, standard or regulation, and states no site-level or country-level figure; this brief treats it as a benchmark to compare a site's own measurement against, not as a GCC data point. A companion EPA technical guide on commercial and institutional facilities gives a complementary diagnostic benchmark for a site's own water assessment: if more than 10 % [6] of a facility's metered water use cannot be accounted for by its major identified end uses, the guide treats that gap as an indication the facility likely has leaks warranting investigation, rather than as a direct measurement of the leaked share itself. The same guide also sets out two measurement methods needing no special instrumentation: shutting off every water-using fixture and piece of equipment, then reading the facility's own water meter immediately and again an hour later — a significant change indicates a leak somewhere in the distribution system or the facility itself — and comparing monthly water bills against the previous month and the same month a year earlier, watching for use that is unexpectedly high once normal seasonal patterns (for example, more water for cooling and irrigation in summer) are taken into account. The same guide gives worked examples of specific equipment leaks — among them a running toilet and a stuck float valve on a cooling-tower make-up line — each with an estimated monthly water loss and an estimated annual cost; this brief does not reproduce those particular figures, because the guide states them in US gallons and prices them at a US water-and-wastewater rate, neither of which this brief's calculation engine converts into a UAE, Oman or Saudi Arabia tariff.

The calculations below apply the benchmark leak share to the same annual water consumption figure in all three countries, and price the resulting loss at a tariff this brief selected for each country, read directly from the underlying tariff observation in that country's own currency — Dubai's Commercial category under Executive Council Resolution No. (16) of 2011 [2], the Authority for Public Services Regulation's non-residential drinking-water tariff as reported by Times of Oman, a category the regulation itself defines to cover government, commercial, industrial, tourism, agricultural and fishery accounts alike [3], and the National Water Company's non-residential tariff as reported by Ajel News, with its official status and effective date confirmed separately by the Saudi Press Agency [4] [5].

The annual consumption figure used throughout is a stated illustrative assumption, chosen to stay above the one consumption boundary any of the three tariffs states (Dubai's top commercial slab, which applies only above a monthly threshold), so that one identical scenario is valid under all three tariffs at once.

Illustrative annual volume of water exposed to leaks — benchmark leak share applied to an illustrative facility's annual water use

Input	Value	Unit	Source or assumption
annual_water_m3	5,000	m³	assumption: illustrative annual water consumption of one commercial or industrial facility, chosen to stay above the 1,091.0616 m³/year threshold above which the Dubai top commercial water slab below applies — an order-of-magnitude scenario only, not a measurement of any specific site
leak_share	6	%	2019 [1]

Formula: annual_water_m3 * (leak_share / 100)

Calculated result: 300 m³

The annual water-consumption figure is an illustrative scenario, held constant across the Dubai, Oman and Saudi calculations below so that only the tariff varies.
Uses EPA's general leak-share benchmark; a site's own measured share may be higher or lower.

Upper-bound illustrative annual cost of that water-leak exposure at Dubai's (DEWA) published commercial water tariff

Input	Value	Unit	Source or assumption
annual_water_m3	5,000	m³	assumption: the same illustrative annual water consumption as in the first calculation above
leak_share	6	%	2019 [1]
tariff_dubai	4.6	fils/IG	2011, Dubai (DEWA) [2]

Formula: annual_water_m3 * (leak_share / 100) * tariff_dubai

Calculated result: 3,036 AED

Illustrative scenario; not a measured site figure.
Excludes any separate sewerage or wastewater charge, which Schedule (2) does not state, and excludes VAT.

Upper-bound illustrative annual cost of that water-leak exposure at Oman's published non-residential drinking-water tariff

Input	Value	Unit	Source or assumption
annual_water_m3	5,000	m³	assumption: the same illustrative annual water consumption as in the first calculation above
leak_share	6	%	2019 [1]
tariff_oman	1,320	baisa/m³	2024 [3]

Formula: annual_water_m3 * (leak_share / 100) * tariff_oman

Calculated result: 396 OMR

Illustrative scenario; not a measured site figure.
Excludes the separate monthly sewage fee and wastewater tariff that a real Omani water bill would carry, which this brief does not price.

Upper-bound illustrative annual cost of that water-leak exposure at Saudi Arabia's reported non-residential water tariff

Input	Value	Unit	Source or assumption
annual_water_m3	5,000	m³	assumption: the same illustrative annual water consumption as in the first calculation above
leak_share	6	%	2019 [1]
tariff_ksa	8	SAR/m³	2027 [4]

Formula: annual_water_m3 * (leak_share / 100) * tariff_ksa

Calculated result: 2,400 SAR

Illustrative scenario; not a measured site figure.
Uses the rate reported to take effect 1 January 2027, not yet in force at this brief's publication date; excludes the separate wastewater charge the same announcement reports, which this brief does not price.

Alternative options

A site facing this question has options beyond "fund a leak-detection-and-repair programme or do not." The measurement methods above — the meter shut-off test and the monthly-bill comparison — cost nothing but staff time and are a reasonable first step for any site that has not already run them, since they establish whether a measurable gap exists before any capital is committed. Submetering major water-using equipment, including cooling-tower make-up lines, reverse-osmosis supply lines and irrigation systems, narrows a detected gap to a specific system without a full site-wide investigation. Installing failure-abatement devices — sensors that detect an abnormal, sustained increase in flow and can alert staff or shut off supply automatically — suits equipment that would otherwise run unattended for long periods, such as a cooling tower's make-up water line. For landscape irrigation specifically, an audit by an irrigation professional against recognised audit guidelines targets a distinct class of outdoor water loss that indoor metering alone will not catch. A site that has already run a water assessment and finds its unaccounted-for gap comfortably below the diagnostic threshold above has a reasonable case for continued monitoring rather than committing capital — provided that case rests on its own measured gap, not the illustrative scenario above, which exists only to show the order of magnitude a leak share represents once priced.

Limitations and missing data

The EPA benchmarks are general U.S. water-efficiency programme statements, not a GCC survey or a site-specific measurement. The leak-share fact sheet [1] states no publication date in its own text; the unaccounted-for diagnostic guide [6], by contrast, states "October 2012" in its own footer on every page. No UAE, Oman or Saudi Arabia-specific survey of facility water-leak rates was located. The illustrative annual water-consumption figure is a stated assumption, chosen only to stay within the one consumption boundary any of the three tariffs states, and should not be read as representing any actual site.

The three country costs are not fully comparable in timing: the Saudi Arabia figure is the National Water Company's reported rate for 1 January 2027, confirmed as official by the Saudi Press Agency, but not yet in force at this brief's publication date, while this desk found no citable figure, from an official or directly citable source, for the non-residential rate in force before that date. Dubai's and Oman's figures, by contrast, are both already in force. None of the three figures includes sewerage, wastewater or VAT charges, which a real bill would carry in addition to the water-consumption charge priced here. Dubai's tariff rests on a 2011 legal resolution; no later consolidating resolution confirming its continued currency was located. Oman's tariff is a phased schedule reported in 2020 that reaches its final stated level in 2024; no later official confirmation that the rate changed, or stayed unchanged, after 2024 was located. This brief does not estimate the capital or labour cost of a leak-detection-and-repair programme itself, only the illustrative scale of what leak exposure can cost; no comparable GCC source for programme costs was found.

Practical next steps

Before funding a water leak-detection-and-repair programme, a decision-maker in any of the three markets should first run the meter shut-off test or the monthly-bill comparison described above, rather than assuming the 6 % [1] benchmark applies to their own site. Second, where a fuller water assessment is available, compare its accounted-for water use against total metered supply and treat a gap above the 10 % [6] diagnostic threshold as a signal to investigate specific systems — submetering cooling towers, irrigation and other major equipment first. Third, confirm the site's own billing category and its own current, metered tariff rather than the illustrative, upper-bound figures above, since a real bill also carries sewerage, wastewater and VAT components this brief excludes. Fourth, weigh the options above — a monitoring-only response, submetering, failure-abatement devices, or an irrigation audit — against the scale that measurement reveals, rather than against the illustrative scenario in this brief. Finally, re-measure periodically: fittings and seals age and new leaks recur, so a single assessment is a starting point, not a one-time fix.