| 551 | An audit of performance in the processing of macro-invertebrate samples in 1992 |
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| 552 | Development of the Acid Water Indicator Community (AWIC) Macroinvertebrate Family and Species Level |
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| 553 | Linking hydrology and ecology : River Wissey : Annex B aquatic macrophytes of the River Wissey |
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| 554 | The available resource methodology : a framework for assessing water resources and abstraction availability : final report |
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| 555 | An environmental assessment of mercury in mussels (Mytilus edulis L.) in the Mersey Estuary : final report |
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| 556 | Heavy metal contaminants in fish caught from the Mersey Estuary and inshore Liverpool Bay |
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| 557 | Herbicides for use in or near the aquatic environment: Priorities for Environmental Quality Standards Development |
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| 558 | Pesticides 2000 : a summary of monitoring of the aquatic environment in England and Wales |
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| 559 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
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| 560 | The Natural (Baseline) Quality of Groundwaters in England and Wales - Magnesium Limestone of Yorkshire and Northumbria |
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| 561 | Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000 |
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| 562 | Analysis of bacteriological contamination and accumulation of metals and organics in the mussel (Mytilus edulis) |
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| 563 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 564 | Catchment management plans : protecting and enhancing the water environment in an integrated manner |
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| 565 | Impact assessment of scour valve test at Roadford Reservoir on water quality of the River Lyd |
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| 566 | Notice to water only companies of programme of environmental obligations agreed by the Secretary of State for the Environment, Transport and the Regions and for Wales : periodic review of water company price limits 2000-2005 |
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| 567 | A review of the hydrogeological information for the Thompson and Merton areas, Norfolk : including predictions of the impact of nearby chalk water abstractions on water levels at Thompson Water, Carr and Common SSSI and candidate SAC |
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| 568 | Analysis of natural and polluted river communities in Great Britain- Progress report for the period April 1984- March 1988
|
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| 569 | Report on two electrofishing surveys carried out between July 10-25 1978 and July 9-12 1979 on the proposed Kielder Water
|
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| 570 | An investigation into the presence of high levels of cadmium in sea-water samples from Mounts Bay, Cornwall |
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| 571 | Water quality modelling in the Environment Agency (Report no.28) : present practice and future challenges : Water Quality Modelling Group workshop proceedings |
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| 572 | Local Environment Agency plan for the West Midlands Tame, 2nd annual review, July 2001 : local environment focus |
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| 573 | The use of constructed wetlands to ameliorate metal-rich mine waters. Stage 1 : study of natural wetlands |
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| 574 | NRA guidance on the acceptable leachable values for contaminated material to be deposited in Upper Tame catchment |
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| 575 | Further monitoring of the impact of Crown Dale waste water treatment works final effluent on water quality |
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