| 51 | Riverside litter : results of the 1990 campaign and a strategy for the future |
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| 52 | The potential for the use of Willow in buffer zones for reducing nitrate and atrazine pollution |
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| 53 | Classification of listed substances for the purposes of the EC groundwater directive (80/68/EEC) : technical report |
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| 54 | Estuarine fish survey 1989 : inferences on the pollution status of the Thames estuary |
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| 55 | The influence of agriculture on the quality of natural waters in England and Wales |
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| 56 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
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| 57 | The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990 |
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| 58 | A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990 |
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| 59 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |
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| 60 | Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon |
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| 61 | Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority |
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| 62 | Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4 |
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| 63 | Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species |
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| 64 | Pesticides in the aquatic environment : report of the National Rivers Authority, prepared by the National Centre for Toxic and Persistant Substances (TAPS) |
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| 65 | 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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| 66 | The effects of ammonia in discharges from Hogsmill Valley sewage treatment works on the water quality of the River Thames at Teddington |
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| 67 | Inferences on the pollution status of the Thames estuary from the macrobenthic community structure : National Rivers Authority Thames Region, Biology, Thames Estuary Benthic Programme |
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| 68 | 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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| 69 | 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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| 70 | Survey of the biological quality of creek systems in the outer Thames Estuary, with special reference to the impact of STW and landfill site discharges |
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| 71 | Radioactivity in the environment : a summary and radiological assessment of the Environment Agency's monitoring programmes : report for 1996 |
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| 72 | Time of travel for the Greadon Farm pollution incident on the Upper Torridge of 19th August 1997 (1997) |
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| 73 | Radioactivity in the environment : report for 1998 : a summary and radiological assessment of the Environment Agency's monitoring programmes |
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| 74 | Review of comments on the Environment Agency's consultative report Endocrine disrupting substances in the environment - what should be done? |
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| 75 | Evaluation of peroxygens for the amelioration of river pollution : on behalf of the Environment Agency, Thames Region |
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