| 26 | The influence of agriculture on the quality of natural waters in England and Wales |
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| 27 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
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| 28 | Assessment of Ivybridge mobile monitoring station and investigation of the water quality of the River Erme and the effect of Ivybridge Sewage Treatment works final effluent |
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| 29 | 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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| 30 | Radioactivity in the environment : a summary and radiological assessment of the Environment Agency's monitoring programmes : report for 1996 |
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| 31 | Radioactivity in the environment : report for 1998 : a summary and radiological assessment of the Environment Agency's monitoring programmes |
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| 32 | Report on the quality of bathing waters in Hampshire, Sussex, Kent and the Isle of Wight : 1992 bathing season |
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| 33 | The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997 |
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| 34 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996 |
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| 35 | Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD |
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| 36 | Interim report on the environmental impacts of the drought on Yorkshire rivers April 1995 to April 1996 |
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| 37 | An investigation into the bacterial water quality of the River Umber, N. Devon : December 1996 : DEV/WQ/14/96 |
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| 38 | An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge |
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| 39 | A desk top study into the probable causes of poor water quality at Higher Hollacombe Farm (RO5K013) on the Hollacombe Lake |
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| 40 | Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank |
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| 41 | Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA |
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| 42 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
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| 43 | Pesticides in the aquatic environment 1997 full report |
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| 44 | Charging for discharges scheme : guidance to the agricultural industry |
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| 45 | Guidance for estimating the air quality impact of stationary sources - GN 24 |
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| 46 | The National Centre for Toxic and Persistent Substances |
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| 47 | The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual) |
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| 48 | River quality in England and Wales : a report of the 1990 survey |
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| 49 | Stream survey and assessment in the Ashford and Folkestone areas |
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| 50 | The 1990 river and estuary classification survey of England and Wales |
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