Bristol Water revealed late last night (Sunday) it has lifted its warning to customers after four days of telling them to boil water before using it.
The advice came once cryptosporidium was detected in the water and the Clevedon treatment works was subsequently closed while tests were conducted.
Many customers in the BS21 and BS49 postcodes were told it was unsafe to drink tap water because of the parasite’s presence.
A Bristol Water spokesman said: “We can now confirm that following consultation and advice from Public Health England, the boil water notice, which has been in place since Thursday for properties in Clevedon, has now been lifted.
“Customers no longer need to boil their water before use.
“Following the detection of cryptosporidium in the untreated raw water supplying the Clevedon treatment works, we took this treatment works out of service.
“The drinking water supply to Clevedon area is now coming from other treatment works and from other sources.
“Over the past few days, we have been taking samples from the treated water storage reservoir in Clevedon and at customers’ houses.
“No cryptosporidium has been detected in any of these samples.
“Consequently, following consultation and advice from Public Health England, we are now lifting the precautionary boil water notice.” Bristol Water has apologised to customers about the disruption.