UK Mandatory Water Efficiency Labelling (MWEL)

What is the UK Mandatory Water Efficiency Label?

The UK Mandatory Water Efficiency Label (MWEL) is a new government-led labelling scheme introduced in 2026. It will require a wide range of water-using household products to display a standardised A-F water efficiency rating. Similar in style to the existing energy efficiency ratings, these labels will help consumers choose more water-efficient products and reduce national water demand. The Mandatory Water Efficiency Label is expected to launch towards the end of 2026.

Why Reducing Water Demand is Important

Reducing water demand is essential as the UK faces significant, growing pressure on its water resources. Climate change, population growth, and environmental limits mean that demand is rising while supply becomes less reliable. The UK’s current use of water is unsustainable in the long term.

If the UK continues to consume water at its current rate, then we won’t have enough in the future. Reducing water demand through water efficiency is essential to ensure the UK has a sufficient supply of water in the future.

Reducing water use supports the country’s resilience to a drier climate while preserving the environment and supporting the economy. Additionally, it also helps households reduce both their water bills and their energy bills from heating water.

The Mandatory Water Efficiency Label aims to help households understand which water-using products will save them water and reduce their utility bills. While the Government has not yet suggested a figure for what households could save on their utility bills through the MWEL scheme, it does estimate that it aims to cut water use by 20% per person by 2038.

How the UK Mandatory Water Efficiency Label Works

The Mandatory Water Efficiency Label will categories water using products by water efficiency, from A to F. Water-using products in the A category will be the most water efficient, while those water-using products in the F category will be the least water efficient. This includes showerheads, basin taps, toilets, urinals, washing machines and dishwashers.

The MWEL labels will be featured on all water-using products, including those that use energy to heat water. Consumers will be able to instantly see which products will help them reduce their water use, and help them save on the water bills, and energy bills when they use less heated water. These product ratings will be visible both online and in-store among retailers of water-efficient products. They will also be featured on individual product packaging for all water-using products.

The 2026 Regulations further specify the inclusion of electric showers and exclusions such as outdoor taps, commercial dishwashers, emergency showers, and medical appliances. Outdoor products, such as water butts, rainwater harvesting products and SUDS products, are exempt.

The Mandatory Water Efficiency Label aims to provide consumers with choice and informed understanding when it comes to buying water-using and water & energy-using appliances. It will be a simple label similar to the energy efficiency label to inform consumers at a glance the water rating of the product they are considering buying.

For the first time, consumers will easily be able to see how much water the product uses, how that compares to other similar products and what impact that could have on lowering their household’s utility bills.

It is important to note that water-efficient products have come a long way in the last twenty years. Water efficiency and saving water do not mean consumers have a worse experience with water than with non-water-saving devices and products. Most times, the user’s experience is at least as good as with a non-water-efficient product, and at best, an improved experience due to better technology and design. The upside, of course, is that users will save water, help the environment, and save money on their utility bills.