Affinity Water said they have successfully repaired a burst water main in Harpenden.
Residents have been without water since this morning, but have been told the supply should be on within the next 30 minutes.
They said people may experience discoloured or aerated water, which – and to leave a mains fed tap running for approximately ten minutes if this happens.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here