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576An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95]
577An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
578Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
579A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994
580A report on the infaunal communities within Weston Bay in relation to the sewage outfall at Black Rock
581Bioccumulation of halogenated compounds by limpets and fucoid seaweeds in the vicinity by the Black Rock sewage outfall, Weston-Super-Mare
582Modelling the contribution from non-agricultural sources to nitrate pollution in the Sor Brook (Thames Region) (UC 3134)
583A desk top study into the probable causes of poor water quality at Higher Hollacombe Farm (RO5K013) on the Hollacombe Lake
584Health effects of sea bathing (WMI 9021) - Phase III final report to the Department of the Environment
585The Economics of No-Spray Zones - a Study of the Risks and Benefits of Pesticide No-Spray Restrictions
586Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph
587Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991
588Final report of the controlled cohort investigations into the health effects of bathing in sewage contaminated coastal waters
589An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989
590An investigation into high concentrations of atrazine in surface waters and the increase in maize production in the Otter valley
591River Habitat Quality the physical character of rivers and streams in the UK and Isle of Man
592Investigation of flow distribution in a fracture zone at the Stripa mine, using the radar method, results and interpretation
593Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA
594An assessment of the causes of non-compliance with river quality standards within the River Tiddy catchment (1989-1991)
595A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 1 : final draft
596Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993
597NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group
598Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report
599Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922
600The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England;