Can You Drink Tap Water in London?
Last updated: October 2025
Introduction: Is Tap Water in London Safe to Drink?
London’s tap water meets strict UK water quality and EU drinking standards, meaning it’s technically potable water — safe for everyday consumption.
However, growing concern about PFAS chemicals, microplastics, and tap water bacteria has made many Londoners question: “Is it really the best water to drink?”
According to the Drinking Water Inspectorate (DWI), over 99.97% of UK tap water samples meet safety standards.
Yet, trace levels of substances like chlorine, lead, and microplastics can still be found — often affecting what water tastes like.
If you’d like to enjoy pure, mineralized water straight from your tap, explore the Bluewater Kitchen Station — a premium home water filtration system that removes up to 99.7% of contaminants.
Where Does London’s Tap Water Come From?
Roughly 70% of London’s water is sourced from the River Thames and Lea Valley reservoirs, while the remaining 30% comes from underground aquifers and boreholes.
This mix undergoes advanced water treatment systems, including filtration, chlorination, and ozonation, before reaching homes.
However, aging pipes and urban runoff can introduce bacteria and chemical residues after treatment.
That’s why more London residents are investing in water filters for home — adding an extra layer of protection for their families.
PFAS in London Tap Water: The Hidden Chemical Concern
PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals used in non-stick cookware, packaging, and industrial coatings.
They are called “forever chemicals” because they don’t easily break down and can accumulate in bacterial cells, animals, and humans.
Health Risks of PFAS Exposure
According to the U.S. Environmental Protection Agency (EPA) and the European Food Safety Authority (EFSA), prolonged exposure can lead to:
- Hormonal and immune disruption
- Increased cholesterol levels
- Cancer risks (kidney, testicular)
- Developmental effects in children
Even though PFAS levels in UK tap water are low, studies show they can persist in the water system for years.
Bluewater’s Kitchen Station uses SuperiorOsmosis™ — an advanced water filter system that removes up to 99.7% of PFAS and other chemicals.
Microplastics in Tap Water: Tiny Particles, Big Problem
Microplastics — small plastic fragments under 5mm — have been detected in tap water and bottled beverages around the world, including London.
These particles often come from:
- Synthetic clothing fibers
- Cosmetic microbeads
- Degraded plastic packaging
- Urban waste
The EFSA Journal found that microplastics may carry harmful substances and chemicals into the body, disrupting hormones and digestion.
Installing a water filtration system for home can capture these particles before they enter your drinking supply.
Tap Water Bacteria and Microorganisms
Even though London’s tap water is disinfected, bacteria in water can occasionally appear in small amounts — especially in older plumbing systems or stagnant pipes.
Common microorganisms include:
- E. coli and Pseudomonas (potentially harmful)
- Lactobacillus (harmless, sometimes beneficial bacteria)
While most bacterial cells are neutral or even beneficial bacteria, some can cause bacterial diseases or illness if consumed in large quantities.
According to the NHS, boiling water can remove bacteria but won’t filter out PFAS, lead, or microplastics.
That’s why many households use reverse osmosis water filters or a whole-house water filtration system for full-spectrum protection.
The Role of Bacteria in Water
- Some good bacteria exist naturally in aquatic environments.
- Harmful microorganisms can appear if pipes are contaminated or water stagnates.
- Water treatment systems disinfect and filter most bacterial cells, but older networks can reintroduce risk.
Fact: The life cycle of bacteria in tap water depends on temperature, pipe materials, and residual chlorine levels.
Is London Tap Water Safe to Drink in 2025?
Yes — London tap water is officially safe to drink under UK and EU law.
It qualifies as potable water and undergoes rigorous testing for chemicals, metals, and microorganisms.
However, "safe" doesn't always mean pure or pleasant-tasting.
Hard minerals, chlorine, and trace substances can make filtered water a healthier and better-tasting choice.
Many Londoners now use a home water filtration system or water filter tap to improve both water quality and taste.
(London City Hall – Water Quality)
How to Improve the Taste and Safety of Tap Water
1. Install a Home Water Filtration System
A water filter for home or whole house water filter removes chlorine, PFAS, and bacteria.
Systems like Bluewater’s Kitchen Station combine reverse osmosis with remineralization for great-tasting, pure water.
2. Maintain Your Plumbing
Regularly clean and replace faucet aerators, and flush your pipes to reduce bacterial buildup.
3. Test Water Quality Periodically
Water quality can vary by borough. A quick potable water test can reveal chlorine, bacteria, or heavy metals.
Make Your London Tap Water Drinkable
Bluewater’s Kitchen Station 1™ is designed for those who want the best water to drink — straight from the tap.
Key Benefits:
- Removes Harmful Contaminants: Filters PFAS, microplastics, and tap water bacteria.
- Adds Essential Minerals: Provides pure water with calcium and magnesium.
- Saves Money and Plastic: Replaces bottled beverages with clean, eco-friendly filtered water.
Explore the Kitchen Station — a compact yet powerful water purification system trusted across the UK.
FAQs — Frequently Asked Questions
Is tap water safe to drink in London?
Yes, it meets strict safety standards, but home filtration ensures even better quality and taste.
Can you drink softened water?
Yes, but it’s not ideal for drinking due to high sodium levels — use filtered water instead.
Does tap water have bacteria?
A small amount of bacteria in water is normal. Most are harmless, but filtration provides peace of mind.
Is tap water safe to drink UK-wide?
Yes — UK tap water is among the best in the world, though filtration enhances safety.
What does water taste like in London?
London water tastes “hard” due to minerals. A water filter system for home reduces limescale and improves flavor.
Is tap water good for you?
It’s healthy and potable, but removing PFAS, chemicals, and microplastics makes it even better.
References
- UK Drinking Water Inspectorate (DWI)
- U.S. Environmental Protection Agency – PFAS
- European Food Safety Authority – PFAS & Microplastics
- Thames Water – Water Quality Report
- World Health Organization – Drinking Water Guidelines
- NHS – Waterborne Illness Information
- London City Hall – Water Safety
Conclusion: London Tap Water — Safe, But Can Be Better
London’s tap water is safe to drink, but not perfect.
Trace PFAS, microplastics, and bacteria can linger, impacting purity and taste.
For the cleanest, pure water, invest in a home water filtration system like the Bluewater Kitchen Station.
It’s an eco-friendly, cost-effective solution for Londoners who want the best water to drink — every day.
Author & Expertise
Written by Bluewater Group
Bluewater is a world leader in sustainable water purification. Our patented SuperiorOsmosis™ technology removes up to 99.7% of contaminants, including PFAS, microplastics, and chlorine, delivering filtered water that’s healthy, safe, and delicious.
