| 51 | 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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| 52 | 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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| 53 | 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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| 54 | Assessment of the water quality before, during and post commissioning of the interim Falmouth sewage treatment scheme - Report No. TWQ/98/02- September 1998 |
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| 55 | An investigation to determine if South Molton STW is the cause of elevated copper and zinc concentrations downstream in the River Mole [DEV/E/18/95] |
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| 56 | A macroinvertebrate survey of the Releath stream and associated tributaries within the vicinity of Trevethan Farm : final draft report - Water Quality section, Cornwall area |
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| 57 | Report for Anglian Water, NRA Unit on the inclusion of storm water overflows into the Orwell Estuary model, and its use to predict limits for SWO discharges |
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| 58 | Assessment of the nutrient status and associated algal productivity of Malham Tarn, Yorkshire
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| 59 | Interim guidelines on the ranges of enteric organism decay rates (T90s) under different marine conditions |
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| 60 | Hope Cove : non-compliance in 1998 with the European Community bathing water directive (76/160/EEC) |
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| 61 | Investigation into the storm overflow discharge regime of Hill Barton Seawage Treatment Works Okehampton |
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| 62 | Quantification of the relationship between effluent quality and biological quality : interim report for stage 1 |
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| 63 | Visits to Cley-next-to-the-sea and Salthouse sea defences, King's Lynn sewage treatment works |
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| 64 | Investigation into the frequency of storm overflow operation at Bradworthy sewage treatment works (1996) |
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| 65 | Assessing the impact of sewage effluent disposal on groundwater (phase 2): final report |
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| 66 | Discharge monitoring in the Kennet catchment. Part 1 : ecological effects of sewage and trade effluents |
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| 67 | Impact assessment of Helston Sewage Treatment Works on water quality of the River Cober Loe Pool |
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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 | Discharge consents and compliance : the NRA's approach to control of discharges to water |
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| 70 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
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| 71 | Monitoring of the River Burn upstream and downstream of Burnham Market sewage treatment works 1999 |
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| 72 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
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| 73 | Time of travel study on the River Wandle under two different flow conditions |
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| 74 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 75 | An investigation into the presence of high levels of cadmium in sea-water samples from Mounts Bay, Cornwall |
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