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201An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
202Conservation and recreation : the Wye challenge : towards a management strategy for the River Wye : summary report (bilingual)
203An investigation into high concentrations of atrazine in surface waters and the increase in maize production in the Otter valley
204Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region
205An assessment of the causes of non-compliance with river quality standards within the River Tiddy catchment (1989-1991)
206A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994
207An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06
208Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994
209Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
210Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD
211A report on the 1993 strategic stock assessment survey of the Eamont catchment with particular reference to salmonid fish
212An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989
213An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95]
214Interim report on the environmental impacts of the drought on Yorkshire rivers April 1995 to April 1996
215Mercury, methylmercury and copper in the River Yare, Norfolk : report to the National Rivers Authority, Anglian Region
216An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 1998-March 1999
217Evaluation of peroxygens for the amelioration of river pollution : on behalf of the Environment Agency, Thames Region
218A desk top study into the probable causes of poor water quality at Higher Hollacombe Farm (RO5K013) on the Hollacombe Lake
219Dead zones, live markers: the biological environments of larger U.K. Rivers
220Fisheries of the middle and lower Wylye and factors affecting their performance
221Ecotoxicology : a report of the NRA R and D Ecotoxicology Group
222The Impact Of Particulate Outputs Associated With Timber Harvesting
223An Investigation of Ecological Change in the Rivers Kennet and Lambourn
224The Seaton, Looe and Fowey catchment management plan : action plan
225Quality audit of biological samples for the 1990 river quality survey