Tap water smells Tunbridge Wells homeowners notice during summer are often caused by warm weather, stagnant water or plumbing issues inside the home. Learn the common causes and when to call a plumber.
During warmer weather, many people notice unusual smells coming from their taps or drains. In most cases, the issue is temporary and harmless. However, some smells can indicate plumbing problems, stagnant water or ageing pipework that should not be ignored.
Why tap water smells can become more noticeable in summer
Higher temperatures can affect both water systems and plumbing inside the home. Warm weather increases bacterial activity and can make stagnant water smells more obvious, especially in unused bathrooms, guest rooms or outdoor plumbing.
If water sits inside little-used pipes for long periods, odours may become more noticeable when taps are first turned on again.
Common tap water smells and what they can mean
Musty or earthy smells
A musty smell often comes from stagnant water in pipework or low-use outlets. This is more common during summer when outdoor taps and secondary bathrooms may not be used regularly.
Chlorine smell
Water suppliers sometimes adjust treatment levels during warmer periods. As a result, chlorine smells may become more noticeable temporarily.
The Drinking Water Inspectorate explains how UK drinking water is monitored and treated for safety:
Drinking Water Inspectorate – Drinking water standards
Metallic smells
Older plumbing systems can sometimes produce metallic-smelling water if pipework is ageing or corroding internally.
Sulphur or “egg” smells
If water smells like rotten eggs, the issue may relate to bacteria inside hot water systems or trapped water in plumbing components.

When the problem may be inside your plumbing system
Sometimes the smell is not coming from the mains water supply at all. Internal plumbing issues can also affect water quality and odour.
Common household causes include:
- Unused pipework or dead legs
- Old pipe materials
- Hot water cylinder issues
- Outdoor taps or hoses left in warm conditions
Homes with older plumbing systems in Tunbridge Wells may be more likely to experience these issues.
Simple checks homeowners can try
Before calling a plumber, there are a few simple checks worth trying:
- Run cold taps for several minutes
- Flush little-used toilets or sinks
- Check whether the smell affects hot water, cold water or both
- Remove hoses connected to outdoor taps
If the smell disappears quickly, stagnant water is often the cause.
Why outdoor plumbing can affect water smells
Outdoor taps and hoses can become warm during summer and may affect nearby water smells, especially if water sits in hoses for long periods.
If you also have issues with outdoor plumbing leaks, you may find this related article useful:
Why Your Outdoor Tap Is Leaking – And How to Fix It in Tunbridge Wells
When to call a plumber in Tunbridge Wells
If unusual smells keep returning, affect multiple taps or are combined with discoloured water or pressure issues, professional inspection is recommended.
Ability provides expert plumbing services across Tunbridge Wells, including leak diagnosis, pipework inspection and general plumbing maintenance:
Ability – Expert Plumbing Services
To arrange a plumbing inspection or ask for advice, contact Ability here:
In summary
Tap water smells Tunbridge Wells homeowners notice during summer are often linked to stagnant water, warm weather or ageing plumbing systems. Identifying the cause early helps keep your water fresh and your plumbing system working properly.






