Slime & staining

Bacteria and fungi, naturally present in air and water, can attach to damp surfaces and multiply to form a visible black slime or stain in various colours (black, red, pink). These growths are known as biofilms or ‘microbial slime’ and are most commonly seen in bathrooms and kitchens. Some biofilms can grow into certain materials and become a permanent feature. Although these biofilms can appear very unpleasant they are generally harmless and do not pose a risk to health.

For more information, including details of how to prevent biofilm growth and how to remove them, please read our factsheet on slime and staining (PDF 168 KB opens in a new window).

We also have an easy-to-read guide which explains how you can keep your tap water in tip-top condition (PDF 2,765 KB opens in a new window) 

If you are at all concerned about the quality of your water please call us on 0345 672 3723. Dial 18001 first if you have hearing or speech difficulties.

High Demand

Help to save water where you can

We’re all enjoying the hot weather but with more of us at home we’re seeing big increases in water demand that may lead to low water pressure in some areas. Our key workers are working around the clock pumping extra water into the network but we’re asking our customers to help save water where they can. Together we can make a big difference. 

You can help by saving water where you can, on average each person uses 142 litres per day and there are some really easy ways to save. 

For water saving tips and more click here

We’re all enjoying the hot weather but with more of us at home we’re seeing big increases in water demand that may lead to low water pressure in some areas. Our key workers are working around the clock pumping extra water into the network but we’re asking our customers to help save water where they can. Together we can make a big difference.

Help save water

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