| River Coln | |
| Subdivision Type1: | Country |
| Subdivision Name1: | England |
| Subdivision Type3: | Counties |
| Subdivision Name3: | Gloucestershire |
| Subdivision Type4: | Districts / Boroughs |
| Subdivision Type5: | Towns |
| Subdivision Name5: | Fairford |
| Discharge1 Location: | Fairford |
| Discharge1 Min: | 0.51m3/s 31 October 1990 |
| Discharge1 Avg: | 2.06m3/s |
| Discharge1 Max: | 6.2m3/s 21 February 1995 |
| Discharge2 Location: | Bibury |
| Discharge2 Avg: | 1.33m3/s |
| Discharge3 Location: | Fossebridge |
| Discharge3 Avg: | 0.47m3/s |
| Source1 Location: | Brockhampton, Gloucestershire |
| Source1 Coordinates: | 51.91°N -1.951°W |
| Mouth: | River Thames |
| Mouth Location: | Lechlade, Gloucestershire |
| Mouth Coordinates: | 51.688°N -1.705°W |
The River Coln is a river in Gloucestershire, England. It rises to the north of Brockhampton, a village to the east of Cheltenham, and flows in a south/south-easterly direction through the Cotswold Hills via Andoversford, Withington, Fossebridge, Bibury, Coln St Aldwyns, Quenington and Fairford. It joins the River Thames to the south-west of Lechlade, near to the confluence with the Thames and Severn Canal.[1]
Midway between Withington and Fossbridge the river passes Chedworth Roman Villa.
Extensive gravel pits between Fairford and Lechlade, now redundant, have been flooded to form the eastern component of the Cotswold Water Park. They are fed and drained by the Coln.[2]
The river is host to many species of freshwater fish including brown trout and grayling.[1]
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.[3]
Water quality of the River Coln in 2019:
| Section | Ecological Status | Chemical Status | Overall Status | Length | Catchment | Channel | |
|---|---|---|---|---|---|---|---|
| 27.138km (16.863miles) | 89.882km2 | ||||||
| 28.025km (17.414miles) | 52.25km2 |