Chester Catholic High School is closed due their water supply being cut off, but exams are going ahead as normal.
Parts of Broughton, Handbridge and Saltney have all been affected by a burst main pipe on Monday (June 13).
A Chester Catholic High spokeswoman said staff were in so all students sitting exams or heading out on trips should come in as normal.
The King's School and Queen's Park High School both confirmed they were opening as usual.
King's director of external affairs Vicki Titmuss said they would 'reassess' the situation at midday.
Belgrave Primary School confirmed they had 'some water' and were going ahead.
Headteacher Deanne Garratt said: "We have advised parents that we are open as usual but will review the situation throughout the day."
Supplier Dee Valley Water said the burst main been found and they were working to solve the problem.
A Dee Valley Water statement said: “Our engineers are in the process of isolating the section leaking in order to restore supplies to the properties affected with no water at present.
“On return of the supply it may be discoloured. If this occurs, please run until clear at your cold kitchen tap.
“We apologise for the inconvenience caused but are doing everything possible to return supplies to normal as soon as possible.”
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