| 51 | Investigation into the cause of high phenols in Budleigh Brook (1998) |
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| 52 | Report on monitoring of environmental quality in the Severn Estuary |
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| 53 | Assessment of the Impact of Nutrient Removal on Eutrophic Rivers |
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| 54 | Alternative Methods For The Biological Classification Of Rivers |
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| 55 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 56 | A Review of Methods for Assessing the Hydromorphology of Lakes |
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| 57 | The Mersey Estuary 1992 surveys : summary of results |
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| 58 | The quality of rivers in England and Wales (1990 to 1995) |
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| 59 | A report on the River Chew at Chewton Mendip, 6th August 1992 |
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| 60 | Biological water quality monitoring in the Midlands region |
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| 61 | The Identification of Oestrogenic Effects in Wild Fish - Phase II |
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| 62 | The Ribble Estuary 1992 surveys : summary of results |
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| 63 | Development of an Estuarine Classification Scheme for the Water Framework Directive |
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| 64 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
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| 65 | Guidance on the use of Bioassays in Ecological Risk Assessment |
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| 66 | Leachate Monitoring For The Brogborough Test Cell Project |
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| 67 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
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| 68 | The National Centre for Toxic and Persistent Substances |
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| 69 | 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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| 70 | 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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| 71 | 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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| 72 | A Proposed Scheme To Ensure The Quality Of Data Generated By Laboratories Undertaking Regulatory Ecotoxicological Testing |
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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 | The National Centre for Environmental Data and Surveillance : annual report April 1998 - April 1999 |
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| 75 | A review of the industrial uses of continuous monitoring systems : minerals industry processes |
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