| 51 | Synoptic State of the Environment Monitoring |
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| 52 | River water quality in the Midlands 1998 |
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| 53 | Technical Summary - Appraisal of the Impact of Multiple Retailers Quality Assurance Schemes on the Environment |
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| 54 | Report on the control of discharges of titanium dioxide waste to the Humber Estuary : main report |
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| 55 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
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| 56 | Clouding: the issue. An appraisal of the effects of turbidity in aquatic systems |
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| 57 | Riverside litter : results of the 1990 campaign and a strategy for the future |
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| 58 | The Possible effects on migratory fish in the River Dee of increased water abstraction |
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| 59 | An investigation into the water quality of the River Waldon during wet weather |
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| 60 | Investigation into the 1999 failure of the European Community bathing waters directive at Beer beach (2001) |
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| 61 | An investigation into the effects of Alton sewage works on the River Wey North |
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| 62 | The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Chalk Of Lincolnshire; |
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| 63 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
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| 64 | National marine baseline survey 1995 : littoral cell 3 : the Wash to the Thames |
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| 65 | Ecological effects of discharges from watercress farms on the chalk-streams of the NRA Wessex Region |
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| 66 | Fish and the Ecological Assessment of Lakes and Rivers for the Water Framework Directive |
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| 67 | The Distribution Of Phytoplankton And Nutrients In The North East Irish Sea During 1997; |
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| 68 | Investigation of the impact on water quality of the SWW Teign estuary sewerage trenching activity |
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| 69 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
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| 70 | Evaluation of the effectiveness of the Water Fringe Option Scheme on Environmental Quality |
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| 71 | Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon |
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| 72 | The Distribution Of Phytoplankton And Nutrients In The North East Irish Sea During 1996; |
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| 73 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
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| 74 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
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| 75 | Study of the behaviour and impact of two sewage treatment works of the Thames catchment |
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