Enter your postcode for an instant water quality report. Hardness, nitrates, lead, fluoride and more — from every UK water company.
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MyTapWater aggregates public water quality reports from all 21 UK water companies — over 1,327 supply zones — into one easy-to-understand report.
All data comes directly from official annual compliance reports submitted to the Drinking Water Inspectorate (DWI) and Scottish Water.
Understand what's in your water and what to do about it.
Why we built this, where the data comes from, and what we believe about transparency in public water supply.
MyTapWater is a free public tool that makes UK water quality data accessible to everyone. Water companies publish detailed annual compliance reports — but they're dense, technical, and scattered across 21 different websites. We've aggregated all of it into a single, simple postcode lookup.
Enter your postcode and in seconds you'll know the hardness, nitrate levels, fluoride, lead, chlorine, and dozens of other parameters for your specific water zone — presented in plain English.
All data is sourced directly from official annual compliance reports published by UK water companies and submitted to the Drinking Water Inspectorate (DWI). The data covers the 2025 reporting year.
For enforcement and improvement programme data, we use the DWI's public register of active improvement programmes — 398 active notices across England and Wales as of March 2026.
Scottish Water data comes from their own public water quality reporting system, regulated by the Drinking Water Quality Regulator for Scotland (DWQR).
The water quality score (out of 100) is calculated from four weighted categories:
Important: All UK tap water legally meets safety standards. The score reflects overall quality and mineral balance relative to ideal ranges — not whether the water is safe to drink. UK tap water is safe to drink.
MyTapWater participates in the Amazon Associates programme and other affiliate programmes. When you click a product link and make a purchase, we may earn a small commission at no extra cost to you. This helps fund the ongoing maintenance of the site. Product recommendations are based solely on water quality data — we only recommend products relevant to your specific water profile.
Questions, feedback, or data corrections? Get in touch.
Learn what's in your water, what it means for your home and health, and what you can do about it.
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Last updated: March 2026
MyTapWater (mytapwater.co.uk) is a UK-based website providing free water quality information. References to "we", "us" or "our" refer to the operators of mytapwater.co.uk.
We collect minimal data. Specifically:
We use a single cookie to remember your cookie consent preference. We do not use advertising cookies or tracking cookies. If you click affiliate links to Amazon or other retailers, those sites may set their own cookies in accordance with their own privacy policies.
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We may update this policy from time to time. The date at the top of this page indicates when it was last revised.
Last updated: March 2026
MyTapWater provides water quality information for informational purposes only. By using this site you agree to these terms.
All water quality data is sourced from official annual compliance reports published by UK water companies and the Drinking Water Inspectorate. While we take care to ensure accuracy, we cannot guarantee the completeness or timeliness of the data. Always refer to your water company's official communications for the most current information.
Nothing on this site constitutes medical or health advice. All UK tap water meets legal safety standards. The water quality scores and ratings on this site reflect quality relative to ideal ranges — not safety. If you have specific health concerns related to water quality, please consult a qualified health professional.
Some links on this site are affiliate links. We may earn a commission if you make a purchase through these links, at no extra cost to you. Affiliate relationships do not influence our data or recommendations.
Full reports are sold through Lemon Squeezy, who acts as the Merchant of Record for all transactions. Lemon Squeezy handles payment processing and VAT collection. Their terms of service apply to all purchases. Contact almondlyapp@gmail.com for any order queries.
The compilation, presentation, and scoring methodology of water quality data on this site is the intellectual property of mytapwater.co.uk. Underlying data remains the property of the respective water companies and the DWI.
We are not liable for any decisions made based on information provided on this site. Use of this site is entirely at your own risk.
These terms are governed by the laws of England and Wales.