The Town and Country Planning (Development Management Procedure) (England) Order 2010 defines Critical Drainage areas as “an area within Flood Zone 1 which has critical drainage problems and which has been notified… [to]…the local planning authority by the Environment Agency”.
For further information on Critical Drainage Areas please call us on 0370 8506506 and ask to speak to a member of our Development Control team based in the relevant area of the country.