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226An investigation of sewage on the beach at Porthcothan
227The Test catchment southern : recommendations for statutory water quality objectives
228The Worcestershire Stour catchment : recommendations for statutory water quality objectives
229An assessment of river water quality in the River Kenn
230Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report
231The quality of rivers and estuaries in Northumbria region 1990
232Estuarial migration of Atlantic salmon in the river Dee (North Wales)
233The NRA in business : annual review and summary accounts 1993-94
234Cyanobacteria (blue-green algae) in the south west region 1989
235Toxic blue-green algae : a report by the National Rivers Authority
236Investigation of salinity in the river Thurne catchment of North East Norfolk
237Water quality investigations in the Newlyn river catchment
238An assessment of water quality in the River Yarty catchment
239Report on monitoring of environmental quality in the Severn Estuary
240Artificial recharge to groundwater in the Otter valley
241The Ely Ouse catchment management plan : final plan : January 1994
242Water quality in Anglian Region : the first five years
243Investigation to determine the cause of the long-term BOD failure at Higher Weaver routine monitoring site (70532960) for 1995 and 1997
244Changes in the phosphorus content of the sediment of Esthwaite Water and water quality in response to a decreasing input of sewage-borne phosphorus
245Water Quality and Freshwater Flow in the Thames Tideway in Relation to Salmon Migration, with particular reference to the effects of low flow in 1990
246Wimbleball pumped storage scheme : review of environmental statement (appendix B3) : implications for water quality in Wimbleball Reservoir, the River Exe (non QUASAR) parameters) and the Exe estuary
247The quality of rivers and canals in England and Wales (1990 to 1992) : as assessed by a new general quality assessment scheme : report of the National Rivers Authority
248Tamar Lakes project 2001 : initial assessment of nutrient data to identify pollution sources, assess the effect of Tamar Lakes on the downstream water quality and to recommend future monitoring requirements
249Investigation of the effects of sewage treatment works discharges on receiving waters in the Lowermoor Water Treatment Works supply area November 1989
250Report for Anglian Water, plc on the use of the Orwell Estuary mathematical model to derive long term consent limits for Cliff Quay STW