| 476 | Clear Options towards an operational model for the Lee Valley Reservoirs |
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| 477 | The Cam catchment : recommendations for statutory water quality objectives |
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| 478 | Guidance for estimating the air quality impact of stationary sources - GN 24 |
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| 479 | Introductory guidance on the Agency's contribution to sustainable development (SD1) |
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| 480 | The National Centre for Toxic and Persistent Substances |
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| 481 | Algal blooms in the Lower Tees- Perspectives and prospects
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| 482 | Acidification of freshwaters: the threat and its mitigation |
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| 483 | Pearl Mussel Image: First out of the blocks |
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| 484 | FWR - User guide for assessing the impact of combined sewer overflows |
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| 485 | The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual) |
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| 486 | The Use of Immuno Based Techniques for Chemical Analysis |
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| 487 | Water from the River Dee : a working partnership |
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| 488 | Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991 |
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| 489 | Snapshots of the environment : understanding coastal water quality |
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| 490 | The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T) |
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| 491 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
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| 492 | Rivers of the Isle of Wight fact file |
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| 493 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
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| 494 | The Mersey estuary : a report on environmental quality |
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| 495 | Stream survey and assessment in the Ashford and Folkestone areas |
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| 496 | Lakes, Ponds and Reservoirs in the Southern Region (NRA) |
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| 497 | The 1990 river and estuary classification survey of England and Wales |
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| 498 | The evaluation of an orion ammonium ion selective electrode (220/15/T) |
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| 499 | An Independent Review of the Defra/EA Research and Development Joint |
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| 500 | Anthropogenic Impacts on the Hydrology of Rivers and Lochs |
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