Skip to main content


Title: Annual classification of river water quality 1990
Author: R.J. Broome
Document Type: Monograph
Annotation: EA additional title info: environmental protection report
The objective of this report is to present the results of the River Water Quality Classification for the three year period 1988-90. Classification is based on the NWC system in which key determinands are tested against target criteria. In addition, as a result of inconsistences in the classification program, there were the following ammendments to the method used in 1989: 1) Suspended solids was tested as a mean not as a median; 2) Results archived as being "greater thans" were taken at actual value and included in assessments; 3) Temperature criteria for Class 2 was corrected from 21.5 degrees C to 28 degrees C. These changes mean that direct comparisions with previous classifications should be treated with caution.
Publisher: National Rivers Authority
Publication Date: 1991
Publication Place: Exeter
Subject Keywords: RiversSuspended solidsWater qualityClassificationRiver Quality ObjectivesLength
Geographic Keywords: EA South WestDevon
Extent: n.p. [85]
Total file downloads: 325

Download PDF    Display PDF in separate tab