| 51 | Report on the control of discharges of titanium dioxide waste to the Humber Estuary : main report |
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| 52 | Investigation of the impact on water quality of the SWW Teign estuary sewerage trenching activity |
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| 53 | An investigation into the water quality of the River Waldon during wet weather |
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| 54 | Investigation into the 1999 failure of the European Community bathing waters directive at Beer beach (2001) |
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| 55 | The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Chalk Of Lincolnshire; |
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| 56 | Fish and the Ecological Assessment of Lakes and Rivers for the Water Framework Directive |
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| 57 | Technical Summary - Appraisal of the Impact of Multiple Retailers Quality Assurance Schemes on the Environment |
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| 58 | Ecological effects of discharges from watercress farms on the chalk-streams of the NRA Wessex Region |
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| 59 | Investigate the feasibility of applying quality methods and standards within the water resources function. |
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| 60 | The environmental impact of the foot and mouth disease outbreak: and interim assessment |
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| 61 | Riverside litter : results of the 1990 campaign and a strategy for the future |
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| 62 | Swords water quality study - phase 1 : modelling the water quality of the River Thames |
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| 63 | National marine baseline survey 1995 : littoral cell 3 : the Wash to the Thames |
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| 64 | Investigation of the water quality in the Buckland stream up and downstream of East/West Buckland |
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| 65 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
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| 66 | Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918 |
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| 67 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
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| 68 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
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| 69 | 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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| 70 | Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group |
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| 71 | Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority |
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| 72 | Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers |
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| 73 | The effects of water resources management on the rivers Bure, Wensum and Nar in North Norfolk : Final project report to the National Rivers Authority. July 1994 |
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| 74 | Investigations into the status of fisheries, biological and water quality in the River Pelenna catchment, prior to the treatment of discharges from abandoned coal mines : PL/EAW/95/3 |
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| 75 | Meiofaunal assemblages of the Thames Estuary, April 1989-March 1990 : modules I-III : a study of the meiofaunal communities present in sediment samples collected by the National Rivers Authority, Thames Region |
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