Visitors are being advised to take care and to not touch or try the rescue any sick birds after a spate of deaths.
The cause of the deaths is not yet known.
Victoria Wilson, Staffordshire County Council’s cabinet member for communities and culture, said: "We are aware that some wild birds at Chasewater have been found dead, but the cause of death has not yet been confirmed.
"We are working with the relevant authorities to analyse the carcasses and until we know more, as a precaution we would recommend that people do not feed any birds, keep dogs on leads near the water and stay to the paths."
People visiting Chasewater have been warned to take care after dead wild birds have been found there.
People should report sick or dead birds by calling 03459 335577 and select option 7.