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576An assessment of mercury contamination in the Red River catchment : final draft report
577The Somerset Levels and Moors : water level management and nature conservation : consultation paper
578Annual review of the Colne, Upper Lee, North London and Roding, Beam and Ingerbourne catchments
579Land use practices and pathways of pesticide residues in the Mount's Bay catchment, Cornwall
580An investigation into the water quality of a treated effluent from Hambleton Dairy, Todber, Dorset
581Economic evaluation of inland fisheries: The economic impact of freshwater angling in England and Wales
582Old Bedford incorporating the Middle Level and Ouse Washes : consultation report - May 1997
583Discharge consents and compliance : the NRA's approach to control of discharges to water
584Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority
585Aldrin and dieldrin concentrations in the Newlyn catchment during 1991 an interim report
586Monitoring of the River Burn upstream and downstream of Burnham Market sewage treatment works 1999
587Nutrient export modelling on the River Bure, Norfolk : progress report 2 : June-July 1995
588An audit of performance in the processing of macro-invertebrate samples in 1992
589Development of the Acid Water Indicator Community (AWIC) Macroinvertebrate Family and Species Level
590Linking hydrology and ecology : River Wissey : Annex B aquatic macrophytes of the River Wissey
591The available resource methodology : a framework for assessing water resources and abstraction availability : final report
592An environmental assessment of mercury in mussels (Mytilus edulis L.) in the Mersey Estuary : final report
593Heavy metal contaminants in fish caught from the Mersey Estuary and inshore Liverpool Bay
594Herbicides for use in or near the aquatic environment: Priorities for Environmental Quality Standards Development
595Pesticides 2000 : a summary of monitoring of the aquatic environment in England and Wales
596An investigation of the Madford River pollution incident of 29 July 1989 : November 1989
597Devon area internal report - measurement of dissolved oxygen levels in the Dart estuary - March 1996
598Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales
599The Natural (Baseline) Quality of Groundwaters in England and Wales - Magnesium Limestone of Yorkshire and Northumbria
600Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000