| 476 | Impact assessment of Helston Sewage Treatment Works on water quality of the River Cober Loe Pool |
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| 477 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : AQC audit |
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| 478 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : primary audit |
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| 479 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : AQC audit |
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| 480 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : primary audit |
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| 481 | Further investigation of the pilot borehole at Bean's Lane, Wortham (94/7/912) : September 1994 |
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| 482 | Saving water : the NRA's approach to water conservation and demand management : a consultation report |
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| 483 | The Warwickshire Avon catchment management plan : consultation report summary (NRA Severn-Trent 44) |
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| 484 | Policy and practice for the protection of groundwater : North West region : 2nd edition, 1995 |
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| 485 | An assessment of mercury contamination in the Red River catchment : final draft report |
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| 486 | The Somerset Levels and Moors : water level management and nature conservation : consultation paper |
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| 487 | Annual review of the Colne, Upper Lee, North London and Roding, Beam and Ingerbourne catchments |
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| 488 | Land use practices and pathways of pesticide residues in the Mount's Bay catchment, Cornwall |
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| 489 | An investigation into the water quality of a treated effluent from Hambleton Dairy, Todber, Dorset |
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| 490 | Economic evaluation of inland fisheries: The economic impact of freshwater angling in England and Wales |
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| 491 | Old Bedford incorporating the Middle Level and Ouse Washes : consultation report - May 1997 |
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| 492 | Discharge consents and compliance : the NRA's approach to control of discharges to water |
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| 493 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
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| 494 | Aldrin and dieldrin concentrations in the Newlyn catchment during 1991 an interim report |
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| 495 | Monitoring of the River Burn upstream and downstream of Burnham Market sewage treatment works 1999 |
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| 496 | Nutrient export modelling on the River Bure, Norfolk : progress report 2 : June-July 1995 |
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| 497 | An audit of performance in the processing of macro-invertebrate samples in 1992 |
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| 498 | Development of the Acid Water Indicator Community (AWIC) Macroinvertebrate Family and Species Level |
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| 499 | Linking hydrology and ecology : River Wissey : Annex B aquatic macrophytes of the River Wissey |
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| 500 | The available resource methodology : a framework for assessing water resources and abstraction availability : final report |
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