It lies close to sea level south of the Polden Hills, historically largely marsh (or "moor" in its older sense).

Light industry now predominates, but traditional trades including peat extraction, willow crafts and cider making may still be found, in addition to livestock farming.

Also notable is the new Isleport trading estate at Highbridge, which houses many global businesses such as Geest (Isleport Foods) who make yoghurt under franchise to Ski & Muller, Brake Brothers who supply the catering trade, BFP wholesale who supply dry goods to bakeries etc., Woodbury & Haines who supply furniture globally, Polybeam Limited who supply GRP radio masts to customers such as Marconi, and also AT&T whose centre there controls all internet cable traffic to and from the US.

Industry in Bridgwater has also seen major growth recently with the opening of "Express Park" which houses Gerber Foods (a global fruit juice supplier), NHS Logistics depot and Eddie Stobart depot.

Schools (those which are not independent) in Sedgemoor are operated the Children & Young People's Directorate of Somerset County Council, although some such as The Kings of Wessex School in Cheddar have distanced themselves from the county council by opting for foundation and then subsequently academy status.