| 51 | The National Centre for Toxic and Persistent Substances |
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| 52 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 53 | An investigation into the sewage system and storm overflow at Beer (1997) |
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| 54 | A report on the River Chew at Chewton Mendip, 6th August 1992 |
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| 55 | The Mersey Estuary 1992 surveys : summary of results |
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| 56 | Development of an Estuarine Classification Scheme for the Water Framework Directive |
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| 57 | River quality in England and Wales : a report of the 1990 survey |
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| 58 | Water quality in Anglian Region : the first five years |
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| 59 | An ecological study of the effects of ferric dosing on the plankton and benthic invertebrates of Grafham Water between May 1990 and November 1991 |
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| 60 | Changes in the phosphorus content of the sediment of Esthwaite Water and water quality in response to a decreasing input of sewage-borne phosphorus |
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| 61 | Investigation to determine the cause of the long-term BOD failure at Higher Weaver routine monitoring site (70532960) for 1995 and 1997 |
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| 62 | Monitoring of the Priory storm overflow on the River Tone at Taunton : June - November 1991 and water quality investigations unit January 1992 |
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| 63 | A study of the use of Glycol-based de-icers at RAF Lyneham and their impact on local watercourses during the winter of 1999/2000 |
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| 64 | Development of the Acid Water Indicator Community (AWIC) Macroinvertebrate Family and Species Level |
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| 65 | An investigation into the water quality of a treated effluent from Hambleton Dairy, Todber, Dorset |
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| 66 | Investigation into the intermittent failure of Wembury Beach to comply with EC bathing water |
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| 67 | Technical basis for the predicted impacts of relocating Redgrave abstraction to Borehole B |
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| 68 | Evaluating the impact of groundwater abstraction on key conservation sites. Stage 1 reports for AMP3 |
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| 69 | Bathing water quality in England and Wales in 1994 : report of the National Rivers Authority |
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| 70 | Analysis of bacteriological contamination and accumulation of metals and organics in the mussel (Mytilus edulis) |
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| 71 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
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| 72 | Investigation of tecnazene contamination in the Chyandour Brook west Cornwall during spring 1990 |
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| 73 | Interim guidelines on the ranges of enteric organism decay rates (T90s) under different marine conditions |
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| 74 | Trevone Bay beach EC bathing water guideline non-compliance : investigation into the Trevone Stream : final report |
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| 75 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
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