Some people in north Norwich suffered a loss of water this weekend, so I've been in touch with the water company to get information on behalf of constituents.
They fixed temporary pump failures both on Saturday and Sunday. They've reassured me that at no time was there any risk to water quality.
If you ever find a problem with your water, use these details: https://www.anglianwater.co.uk/services/faqs/i-have-no-water-is-there-a-problem/