| 76 | Toxic blue-green algae : a report by the National Rivers Authority |
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| 77 | The quality of rivers and estuaries in Northumbria region 1990 |
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| 78 | Conservation in the Severn-Trent Region (NRA Severn-Trent 57)
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| 79 | Anthropogenic Impacts on the Hydrology of Rivers and Lochs |
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| 80 | Environmental snapshot for the East of England [1999] |
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| 81 | Environmental protection and pollution control : in the North West |
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| 82 | Quality audit of biological samples for the 1990 river quality survey |
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| 83 | The quality of rivers in England and Wales (1990 to 1995) |
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| 84 | Water quality in Anglian Region : the first five years |
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| 85 | River water quality in the Midlands 1994/95 : water quality summary data |
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| 86 | A Review of Methods for Assessing the Hydromorphology of Lakes |
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| 87 | Guidance for estimating the air quality impact of stationary sources - GN 24 |
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| 88 | Method for the assessment of river water quality using benthic macroinvertebrates |
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| 89 | Environmental snapshot for the East of England [2000] |
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| 90 | Swords water quality study - phase 1 : water quality of the Thames |
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| 91 | Report on the quality of bathing waters 1990 |
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| 92 | Policy and practice for the protection of groundwater |
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| 93 | Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report |
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| 94 | Snapshots of the environment : a new environmental approach |
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| 95 | Proposals for statutory water quality objectives : report of the National Rivers Authority |
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| 96 | Toxicity Reduction Evaluation Case Summary for the Pulp and Paper Industry |
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| 97 | Report on monitoring of environmental quality in the Severn Estuary |
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| 98 | The NRA in business : annual review and summary accounts 1993-94 |
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| 99 | River quality in England and Wales : a report of the 1990 survey |
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| 100 | Environmental snapshot for the East of England (summary report) |
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