Title: An investigation into ammonia levels in Weston Mill Lake, Devonport
Author: National Rivers Authority South West Region
Document Type: Monograph
Abstract:
On 6/11/89 the Tidal Waters Unit (TWU) of the National Rivers Authority (NRA), South West Region investigated the levels of ammonia in Weston Mill Lake and the adjoining Tamar Estuary. This work was undertaken at the request of the Tidal Waters Officer of the NRA, to determine the levels of un-ionised ammonia and total ammonia in the vicinity of the discharge from Camels Head Sewage Treatment Works (S1W). On the day of sampling, all un-ionised ammonia results obtained from the studied area of Weston Mill Lake and the Hamoaze, were within the water quality standard (WQS) recommended to protect the migration of salmon. The highest level of total ammonia, excluding the sample collected at the discharge, appeared in the vicinity of the outfall. However, this value was similar to the concentrations of all surface samples and to levels found in previous work on the Tamar Estuary. Consequently, it is believed that further investigations should be made in order to quantify the impact of the discharge from Camels Head Sewage Treatment Works on estuarine waters.
Publisher: National Rivers Authority
Publication Date: 1990
Publication Place: Exeter
Subject Keywords: Estuaries; Lakes; Ammonia; Sewage treatment
Geographic Keywords: EA South West; Tamar; Cornwall; Devon
Extent: n.p. [9]
Permalink: http://www.environmentdata.org/archive/ealit:2704
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