Gavin Bevis
BBC Local Live

It's also worth noting the problem is only affecting Severn Trent customers in these areas. 

If you receive your bills from South Staffs Water you can carry on using your supply as normal.

Gavin Bevis
BBC Local Live

While we wait for the latest from Severn Trent, here's a reminder that not every single household in the five postcode areas - DE11, DE15, DE65, DE73 and LE65 - is affected.

The firm's website has a full list of individual postcodes where residents should avoid using their water. You can see it here, external.

Gavin Bevis
BBC Local Live

This is the latest update issued by Severn Trent Water at 06:50, external.

However, the firm says it will be providing a further update at about 08:30.

Gavin Bevis
BBC Local Live

To recap, about 3,700 households in Derbyshire and Leicestershire have been warned not to use their water by Severn Trent, external.

The firm issued the warning yesterday afternoon after it found high levels of chlorine at a reservoir.

The problem is affecting households in five postcode areas - DE11, DE15, DE65, DE73 and LE65. It is hoped normal service will be resumed at some point after 12:00.

Gavin Bevis
BBC Local Live

Hi everyone. I'll be with you for the next few hours to provide updates on the water problems affecting thousands of homes in Derbyshire.