|• location||Purton, Braydon Forest|
The river was crossed by the now-derelict North Wilts Canal a few hundred yards south of Cricklade. In December 2000, as part of regeneration of the canal, rescue work was started on the River Key Aqueduct. The river was also crossed by a bridge of the Midland & South Western Junction Railway.
The Environment Agency measures the water quality of the river systems in England. Each is given an overall ecological status, which may be one of five levels: high, good, moderate, poor and bad. There are several components that are used to determine this, including biological status, which looks at the quantity and varieties of invertebrates, angiosperms and fish. Chemical status, which compares the concentrations of various chemicals against known safe concentrations, is rated good or fail.
Water quality of the River Key in 2019:
|Key (Source to Thames)||Moderate||Fail||Moderate||10.479 km (6.511 mi)||27.757 km2 (10.717 sq mi)|
- Fred. S Thacker The Thames Highway Vol II Locks and Weirs 1920
- North Wilts Canal Trust
- "Glossary (see Biological quality element; Chemical status; and Ecological status)". Catchment Data Explorer. Environment Agency. 17 February 2016. Text was copied from this source, which is available under an Open Government Licence v3.0. © Crown copyright.
- "Key (Source to Thames)". Catchment Data Explorer. Environment Agency.