| 51 | Investigation of the effects of sewage treatment works discharges on receiving waters in the Lowermoor Water Treatment Works supply area November 1989 |
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| 52 | Implications of draft EC Directive concerning municipal waste water treatment : Memorandum submitted by the NRA to House of Lords Select Committee on the European Communities |
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| 53 | Changes in the phosphorus content of the sediment of Esthwaite Water and water quality in response to a decreasing input of sewage-borne phosphorus |
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| 54 | Investigation into the storm overflow discharge regime of Hill Barton Seawage Treatment Works Okehampton |
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| 55 | Assessing the impact of sewage effluent disposal on groundwater (phase 2): final report |
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| 56 | Time of travel study on the River Wandle under two different flow conditions |
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| 57 | Hope Cove : non-compliance in 1998 with the European Community bathing water directive (76/160/EEC) |
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| 58 | Discharge consents and compliance : the NRA's approach to control of discharges to water |
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| 59 | Impact assessment of Helston Sewage Treatment Works on water quality of the River Cober Loe Pool |
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| 60 | Discharge monitoring in the Kennet catchment. Part 1 : ecological effects of sewage and trade effluents |
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| 61 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 62 | Monitoring of the River Burn upstream and downstream of Burnham Market sewage treatment works 1999 |
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| 63 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
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| 64 | Interim guidelines on the ranges of enteric organism decay rates (T90s) under different marine conditions |
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| 65 | Investigation into the frequency of storm overflow operation at Bradworthy sewage treatment works (1996) |
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| 66 | Visits to Cley-next-to-the-sea and Salthouse sea defences, King's Lynn sewage treatment works |
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| 67 | Assessment of the nutrient status and associated algal productivity of Malham Tarn, Yorkshire
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| 68 | River Avon, Bath : aesthetic study of riverbanks through the urban area of Bath : final report |
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| 69 | An investigation to determine if Deep Moor Landfill Site is causing an impact downstream in the Peagham Stream |
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| 70 | An investigation into the presence of high levels of cadmium in sea-water samples from Mounts Bay, Cornwall |
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| 71 | Investigation into failures of the River Dalch from Canns Mill Bridge to below Lapford sewage treatment works (2001) |
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| 72 | Environmental Impacts of Alkylphenol Ethoxylates and Carboxylates. Part 1 Proposals for the Development of Environmental Quality Standards |
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| 73 | An investigation into possible causes of poor water quality at Nymphayes Bridge (R30D009) on the Gissage Lake |
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| 74 | Report on US study tour of engineered wetlands for the treatment of waste water and mine drainage, March 1992 |
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| 75 | Light scattering in sewage effluent: a study of the effects of angle of scatter an common light sources |
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