River Levels
River Levels

Colne Brook at Horton Mill FWS

Current River Level


At 6:30pm, Wednesday 27th September BST
(5:30pm, Wednesday 27th September GMT)

Below normal for this location

Steady, no change from previous measurement at 6:15pm, Wednesday 27th September BST

Flood Warning Areas Covering Here

Colne Brook at Colnbrook

No current or recent warnings.

Colne Brook at Iver and Colnbrook

No current or recent warnings.

Other Nearby Flood Warning Areas

River Thames at Horton

No current or recent warnings.

River Colne and Frays River at West Drayton and Stanwell Moor

No current or recent warnings.

River Thames at Wraysbury

No current or recent warnings.

Seven Day Level Chart

Long Term Level Chart

Darker blue shaded areas on long term data indicate maximum and minimum levels for the date (you may need to zoom in closer to see them).

Long term data may have gaps where the API data was not available.

Download long term data as csv

Note: CSV data will include any outlying values that have been ignored by our graphing system as probably erroneous (eg, because they are ridiculously high compared to the values either side of them). It is your responsibility to filter these out if necessary.

Important! If you are planning to retrieve the csv data automatically, you must read and understand the limitations on the data and its availability.

Location and Technical Data

  • Monitoring Station: Horton Mill FWS
  • Watercourse: Colne Brook
  • Nearest Town/Village: Horton
  • Local Authority: Windsor and Maidenhead
  • Ceremonial County: Berkshire
  • Coordinates: 51°28'18"N 0°31'52"W (51.47174,-0.53123)
  • OS Grid: TQ0211175776 (502111,175776)
  • Mapcode (Local): GBR GB0.QHW
  • Mapcode (Global): VHFTH.R80L
  • Open Location Code: 9C3XFFC9+MG
  • Maidenhead Locator System: IO91rl63
  • Environment Agency Location ID: 2897BTH
  • Environment Agency Gauge ID: 2897BTH-level-stage-i-15_min-mASD
  • Catchment Area: Colne (Lower)
  • UK Hydrometric Area: Thames
  • Environment Agency Region: Thames
  • Datum Type: Above Stage Datum (ASD)
  • Stage Datum: 18.799m AOD

Please note: Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

The usual range of the Colne Brook at Horton Mill FWS is between 0.12m and 0.42m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Colne Brook at Horton Mill FWS over the past 12 months has been between 0.02m and 0.27m. It has been between these levels for at least 150 days in the past year.

The highest level ever recorded at the Colne Brook at Horton Mill FWS is 0.41m, reached on Sunday 16th February 2020 at 6:30pm.

Note that this data may not take account of recent measurements, as we wait until a level has been verified by the Environment Agency before adding it to our records.

Nearby Monitoring Locations

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