What Are the HSE Rules for Drinking Water?

Sanitary

Drinking water must be fit for human consumption and must meet the wide safety margins as specified within The Water Supply (Water Quality) Regulations 2016. These rules are designed to remove any risk posed to worker health from the water they drink while working. 

Fundamentally, water must be fit for use in domestic tasks such as cooking, drinking, food preparation and washing, as well as for food production purposes. These standards require wholesome drinking water to meet specific limits for nitrite, microorganisms, and bacteria, including both their presence and concentration.

Readily available

Drinking water must be easily accessible on site, with adequate volumes stored to meet the needs of all staff throughout the working day. Maintaining a steady supply of clean, wholesome drinking water supports worker health, particularly in environments where physical activity, heat or prolonged shifts increase demand. 

Storage options include standard tanks and bowsers for daily use, as well as bladder tanks and large static tanks for high-capacity or long-term requirements. These systems allow drinking water to remain readily available, even in remote locations or where mains access is not possible.

Clearly labelled

Drinking water must be clearly labelled to indicate that it is fit for human consumption. Equally, non-potable water - used for tasks such as dust suppression or equipment cleaning - must carry clear markings to confirm that it is not suitable for drinking. Labelling helps prevent the risk of confusion between potable and non-potable supplies, reducing the potential danger of exposure to substances that may compromise human health.

Regular risk assessments

Site managers must carry out regular risk assessments to maintain hygiene standards and meet the Health and Safety Executive’s regulations for drinking water. These assessments should confirm that drinking water remains protected from contamination by non-potable water, chemicals, or other potential risks present in the surrounding environment.

Checks must confirm that water quality remains within acceptable limits and that storage and supply systems continue to operate safely. All findings should be documented and retained as part of the site’s compliance records. Regular reviews support strict adherence to safety protocols, and help to maintain the integrity of drinking water supplies on site while protecting public health and the surrounding environment.

Failure to uphold these standards can leave construction businesses liable for fines and legal repercussions.

What Other Drinking Water Legislation Should be Followed on Construction Sites?

Construction sites should follow several pieces of legislation which are in place to protect worker wellbeing, public health and environmental health.

The EU’s Drinking Water Directive (Council Directive 98/83/EC) was first implemented in the UK in 1982 to establish consistent standards for drinking water quality, including provision for workers in remote or temporary locations. Following the UK’s withdrawal from the European Union, this legislation no longer applies. However, its principles continue to influence current domestic regulations. 

On construction sites, the requirement to provide safe, compliant drinking water is now governed by UK health and safety legislation and related regulatory frameworks such as the Water Industry Act 1991 and Construction (Design and Management) Regulations 2015 (CDM 2015) which is regulated by The Health and Safety Executive.

CDM 2015

This legislation specifies that all construction sites in the UK must provide an adequate supply of wholesome drinking water. This water must be readily accessible at appropriate locations across the site. Each drinking water point must be clearly marked with an appropriate sign to indicate that it is safe for consumption.

In addition, suitable drinking vessels - such as disposable or reusable cups - must be provided unless the water is supplied in a manner that allows workers to drink tap water directly from a jet without the need for a container. These measures apply to all construction sites regardless of size or duration and help maintain the health and welfare of workers on site.

Water Industry Act 1991

The Water Industry Act 1991 sets out the regulatory framework for water supply and wastewater services in England and Wales. It places a legal duty on water undertakers to supply water that is safe and fit for human consumption. As part of this framework, operators are required to obtain the relevant abstraction and discharge licences for water use and wastewater disposal.

This act also introduces strict monitoring and reporting obligations in place to minimise contamination of local ecosystems and detriment to the wider environment. Water suppliers must routinely test water quality and report results to the appropriate authorities to demonstrate compliance with statutory standards. This supports transparency and accountability across the sector.

Additionally, the act prohibits water companies from disconnecting domestic premises from the public supply due to non-payment. This safeguard helps protect public health and welfare by maintaining uninterrupted access to drinking water for residential users.

What Is the Water Protection Act UK 2025?

The Water (Special Measures) Act 2025 sets out a framework to improve regulation and accountability across the water sector. It introduces new powers to water regulators which aim to reduce the pollution into water bodies by commercial operations. These new rules aim to:

• Prevent the awarding of bonuses to executives whose companies discharge pollution into waterways
• Pursue criminal proceedings against repeat offenders
• Impose automatic and stringent penalties for regulatory breaches
• Require monitoring of all sewage discharge points

In support of enforcement, the act also includes provisions to:

• Allow courts to impose custodial sentences where obstruction of regulatory investigations has occurred
• Enable these offences to be tried in the Crown Court
• Hold executives and directors criminally liable when offences take place with their involvement or through neglect

Stay compliant with drinking water laws by speaking to Universal Tankers about your drinking water obligations. We deliver potable water that meets all relevant UK regulations.

What is the Difference Between Wholesome Water and Non-Potable Water?

Wholesome water is clean drinking water that complies with the quality standards specified in the Water Supply (Water Quality) Regulations 2016 and is monitored by the Drinking Water Inspectorate (DWI). It is suitable for human consumption and for hygiene-related uses where people come into direct contact with the water.

On construction and industrial sites, wholesome water may be required for welfare facilities and other site welfare requirements, including drinking, food preparation, personal washing and handwashing. The need for wholesome water should be determined according to the intended application and the site’s risk assessment.

Non-potable water has not been treated to meet drinking water standards and is not suitable for consumption or hygiene purposes. It may contain microorganisms, suspended particles or other contaminants, making it unsuitable for applications involving direct human contact.

However, non-potable water can provide a practical and cost-effective supply for site operations where drinking water standards are not required. Depending on the application and project requirements, this can include concrete mixing, soil compaction, equipment washing and water used to support dust control.

The main distinction is therefore how the water will be used. Wholesome water is required where water is intended for drinking or appropriate hygiene uses, while non-potable water can be used for suitable construction and industrial processes where human consumption is not involved.

How Can Universal Tankers Help With Your Construction Site Water Supply?

Universal Tankers provides scheduled, emergency, flexible and one-off deliveries of drinking water for construction sites across England and Scotland, with guaranteed next-day service throughout both countries. We can also support deliveries to some areas of Wales.

With more than 20 years of experience and 20 depots across England and Scotland, we have the operational capacity to provide a reliable water supply for projects of different sizes and durations. Our bulk water supply service can provide the volumes required for welfare provision, temporary facilities and other approved uses across the construction sector.

Our modern fleet includes tankers suited to a range of site and access conditions. We can supply water in the volumes required and establish a flexible delivery schedule around project demand, helping construction companies maintain continuity where mains water is unavailable, insufficient or temporarily disrupted.

Where an alternative water supply is required, our team can also respond to unexpected demand through emergency and one-off deliveries. Water intended for drinking and welfare use is handled appropriately throughout the delivery process to help prevent contamination and maintain the required drinking water quality standards.

We work with construction businesses across the UK to support planned and responsive water requirements, providing a dependable supply that can adapt as site demand changes.