| 51 | An investigation into the bathing water quality at Porthallow |
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| 52 | The 1990 river and estuary classification survey of England and Wales |
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| 53 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 54 | Non-compliance with water quality objectives on the Croyde stream (upper catchment) |
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| 55 | The Ribble Estuary 1992 surveys : summary of results |
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| 56 | Cyanobacteria (blue-green algae) in the south west region 1989 |
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| 57 | Quality audit of biological samples for the 1991 river quality survey |
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| 58 | The quality of rivers in England and Wales (1990 to 1995) |
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| 59 | Investigations of discharges into the River Lemon at Newton Abbot |
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| 60 | The National Centre for Environmental Data and Surveillance : business plan 1999/2000 |
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| 61 | Pesticides in the aquatic environment 1997 full report |
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| 62 | The fuel additive MTBE - a groundwater protection issue? |
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| 63 | Charging for discharges scheme : guidance to the agricultural industry |
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| 64 | Policy and practice for the protection of groundwater : Thames Region appendix |
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| 65 | Guidance on the use of Bioassays in Ecological Risk Assessment |
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| 66 | Macroinvertebrates in the Kennet catchment : Part 1 - water quality monitoring |
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| 67 | Biological water quality monitoring in the Midlands region |
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| 68 | Applications Of Artificial Intelligence For The Biological Surveillance Of River Quality |
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| 69 | Guidance for estimating the air quality impact of stationary sources - GN 24 |
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| 70 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
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| 71 | Report on monitoring of environmental quality in the Severn Estuary |
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| 72 | The National Centre for Toxic and Persistent Substances |
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| 73 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 74 | The Identification of Oestrogenic Effects in Wild Fish - Phase II |
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| 75 | A review of the optimum accuracy of flow and rainfall forecasting |
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