The directors of the community interest company that runs it say they need to "move fast".
Residents are unsure who is responsible for the board but say the problem needed to be addressed.
Anglian Water wants to replace its current facility, but the government withdrew funding.
Anglian Water is replacing its current facility near Milton with a new plant close to Horningsea.
A lorry driver was arrested on suspicion of causing death by dangerous driving.
Developers say the plans "set a new standard" but a government decision on waterworks is delayed.
The Department for Environment, Food and Rural Affairs is asking for responses by 3 February.
The government is delaying the decision for a second time to allow more time for consideration.
Excavations in the East reveal Roman "mega-industries" making beer, salt, pottery - and roads.
