Rutland Water and Grafham Water are among five parks run by Anglian Water to have once again received Green Flag Awards.
Alton Water has also achieved the Green Heritage Site Accreditation, supported by Historic England, for the management of its historic features.
The Green Flag Award - which was also given to Pitsford Reservoir and Taverham Mill - is the international quality mark for parks and green spaces.
Jake Williams, managing director of Anglian Water Parks, said: “The parks are great places for people to explore and wildlife to thrive."
The Green Flag Award scheme, managed by environmental charity Keep Britain Tidy, recognises and rewards well-managed parks and green spaces.
Keep Britain Tidy’s Green Flag Award scheme manager Paul Todd MBE said: “These parks are a vital green space for the communities across Cambridgeshire, Norfolk, Northamptonshire, Suffolk and Rutland, bringing people together and providing opportunities to lead healthy lifestyles.
“The staff and volunteers do so much to ensure that it maintains the high standards of the Green Flag Award, and everyone involved should feel extremely proud of their achievement.”
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