| 51 | The quality of rivers, canals and estuaries in England and Wales : report of the 1990 survey |
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| 52 | A review of the performance of Aldershot STW and its effect on the River Blackwater |
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| 53 | The Distribution Of Phytoplankton And Nutrients In The North East Irish Sea During 1996; |
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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 | Biological investigation into the impact of the storm overflow at Middle Marwood Sewage Treatment Works |
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| 56 | An investigation into the water quality of the River Waldon during wet weather |
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| 57 | Investigation into the 1999 failure of the European Community bathing waters directive at Beer beach (2001) |
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| 58 | The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Chalk Of Lincolnshire; |
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| 59 | Fish and the Ecological Assessment of Lakes and Rivers for the Water Framework Directive |
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| 60 | Technical Summary - Appraisal of the Impact of Multiple Retailers Quality Assurance Schemes on the Environment |
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| 61 | The Distribution Of Phytoplankton And Nutrients In The North East Irish Sea During 1997; |
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| 62 | Ecological effects of discharges from watercress farms on the chalk-streams of the NRA Wessex Region |
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| 63 | Investigate the feasibility of applying quality methods and standards within the water resources function. |
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| 64 | Evaluation of the effectiveness of the Water Fringe Option Scheme on Environmental Quality |
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| 65 | The environmental impact of the foot and mouth disease outbreak: and interim assessment |
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| 66 | Riverside litter : results of the 1990 campaign and a strategy for the future |
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| 67 | Swords water quality study - phase 1 : modelling the water quality of the River Thames |
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| 68 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
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| 69 | Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918 |
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| 70 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
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| 71 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
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| 72 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
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| 73 | An investigation into the effects of Alton sewage works on the River Wey North |
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| 74 | Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon |
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| 75 | Report for Anglian Water, NRA Unit on the uses of the Orwell and the Stour Estuaries and the use of the mathematical model to derive long term consent limits for all inputs to Orwell Estuary |
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