| 476 | Interim guidelines on the ranges of enteric organism decay rates (T90s) under different marine conditions |
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| 477 | Trevone Bay beach EC bathing water guideline non-compliance : investigation into the Trevone Stream : final report |
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| 478 | Water pollution incidents in England and Wales 1994 : report of the National Rivers Authority |
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| 479 | Discharge consents and compliance : the NRA's approach to control of discharges to water |
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| 480 | Saving water : the NRA's approach to water conservation and demand management : a consultation report |
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| 481 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk D in 2011 |
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| 482 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk A |
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| 483 | Old Bedford incorporating the Middle Level and Ouse Washes : consultation report - May 1997 |
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| 484 | Impact assessment of Helston Sewage Treatment Works on water quality of the River Cober Loe Pool |
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| 485 | Improved monitoring for surface water quality : the development of a manual of best practice |
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| 486 | The River Babingley. Volume 1 : executive summary : a report for National Rivers Authority, Anglian Region |
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| 487 | Water pollution incidents in England and Wales - 1990 : report of the National Rivers Authority |
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| 488 | Economic evaluation of inland fisheries: The economic impact of freshwater angling in England and Wales |
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| 489 | Demand for irrigation water (413/1/A) : progress report for the period August 1992 to January 1993 |
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| 490 | An audit of performance in the processing of macro-invertebrate samples in 1992 |
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| 491 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk D |
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| 492 | Annual review of the Colne, Upper Lee, North London and Roding, Beam and Ingerbourne catchments |
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| 493 | Hope Cove : non-compliance in 1998 with the European Community bathing water directive (76/160/EEC) |
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| 494 | The hydrological effects of demand management : project definition stage report : 28th May 1996 |
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| 495 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 496 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 497 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2011 |
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| 498 | Manual for the use of herbicides in or near water : January 1993 : final draft report |
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| 499 | An assessment of mercury contamination in the Red River catchment : final draft report |
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| 500 | Report on the By Brook low flow investigations : October 2001 : volume 1 : report |
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