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51Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
52A review of the performance of Aldershot STW and its effect on the River Blackwater
53Ecological effects of discharges from watercress farms on the chalk-streams of the NRA Wessex Region
54Riverside litter : results of the 1990 campaign and a strategy for the future
55Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
56Report on the control of discharges of titanium dioxide waste to the Humber Estuary : main report
57The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
58Report on the control of discharges of titanium dioxide waste to the Humber Estuary : appendices
59An investigation into the water quality of the River Waldon during wet weather
60Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4
61The effects of water resources management on the rivers Bure, Wensum and Nar in North Norfolk : Final project report to the National Rivers Authority. July 1994
62Inferences on the pollution status of the Thames estuary from the macrobenthic community structure : National Rivers Authority Thames Region, Biology, Thames Estuary Benthic Programme
63Survey of the biological quality of creek systems in the outer Thames Estuary, with special reference to the impact of STW and landfill site discharges
64The effects of ammonia in discharges from Hogsmill Valley sewage treatment works on the water quality of the River Thames at Teddington
65Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
66Pesticides in the aquatic environment : report of the National Rivers Authority, prepared by the National Centre for Toxic and Persistant Substances (TAPS)
67Investigations into the status of fisheries, biological and water quality in the River Pelenna catchment, prior to the treatment of discharges from abandoned coal mines : PL/EAW/95/3
68Meiofaunal assemblages of the Thames Estuary, April 1989-March 1990 : modules I-III : a study of the meiofaunal communities present in sediment samples collected by the National Rivers Authority, Thames Region
69Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991
70Evaluation of peroxygens for the amelioration of river pollution : on behalf of the Environment Agency, Thames Region
71Radioactivity in the environment : a summary and radiological assessment of the Environment Agency's monitoring programmes : report for 1996
72Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD
73The use of air cooled blastfurnace slag as an unbound aggregate in the construction industry : BACMI/Environment Agency joint guidelines
74Time of travel for the Greadon Farm pollution incident on the Upper Torridge of 19th August 1997 (1997)
75Tributyltin in the aquatic environment : final report to the National Rivers Authority September 1990 to September 1992