| 251 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : primary audit |
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| 252 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk B |
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| 253 | Further investigation of the pilot borehole at Bean's Lane, Wortham (94/7/912) : September 1994 |
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| 254 | The Warwickshire Avon catchment management plan : consultation report summary (NRA Severn-Trent 44) |
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| 255 | An assessment of mercury contamination in the Red River catchment : final draft report |
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| 256 | Annual review of the Colne, Upper Lee, North London and Roding, Beam and Ingerbourne catchments |
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| 257 | An investigation into the water quality of a treated effluent from Hambleton Dairy, Todber, Dorset |
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| 258 | Old Bedford incorporating the Middle Level and Ouse Washes : consultation report - May 1997 |
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| 259 | Discharge consents and compliance : the NRA's approach to control of discharges to water |
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| 260 | Aldrin and dieldrin concentrations in the Newlyn catchment during 1991 an interim report |
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| 261 | Monitoring of the River Burn upstream and downstream of Burnham Market sewage treatment works 1999 |
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| 262 | Nutrient export modelling on the River Bure, Norfolk : progress report 2 : June-July 1995 |
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| 263 | Development of the Acid Water Indicator Community (AWIC) Macroinvertebrate Family and Species Level |
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| 264 | An environmental assessment of mercury in mussels (Mytilus edulis L.) in the Mersey Estuary : final report |
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| 265 | Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000 |
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| 266 | Catchment management plans : protecting and enhancing the water environment in an integrated manner |
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| 267 | Impact assessment of scour valve test at Roadford Reservoir on water quality of the River Lyd |
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| 268 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2012 |
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| 269 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk C in 2011 |
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| 270 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2013 |
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| 271 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk D in 2012 |
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| 272 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk C in 2013 |
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| 273 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk A in 2011 |
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| 274 | Report on two electrofishing surveys carried out between July 10-25 1978 and July 9-12 1979 on the proposed Kielder Water
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| 275 | Analogue (nutrient), YSI, turbidity and stage data for the Wensum Demontration Test Catchment's monitoring kiosk F in 2013 |
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