River Levels
River Levels

Stanwell Gate 1 (Lake Offtake) Monitoring Station

Current River Level

18.740m

At 3:30pm, Thursday 25th April BST
(2:30pm, Thursday 25th April GMT)

Within the usual range for this location

Steady, no change from previous measurement at 3:15pm, Thursday 25th April BST


Important! The levels for this location are measured relative to sea level, not relative to the riverbed. The levels shown here do not, therefore, necessarily represent the actual depth of the water.

Flood Warning Areas Covering Here

River Colne and Frays River at West Drayton and Stanwell Moor

No current or recent warnings.

Lower River Colne and Frays River

Recent warnings or alerts no longer in force

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.

Colne Brook at Colnbrook

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: Stanwell Gate 1 (Lake Offtake)
  • Watercourse:
  • Nearest Town/Village:
  • Local Authority: Hillingdon
  • Ceremonial County: Greater London
  • Coordinates: 51°28'1"N 0°29'59"W (51.467107,-0.499792)
  • OS Grid: TQ04307530 (504305,175305)
  • Mapcode (Local): GBR 0G.BPF
  • Mapcode (Global): VHFTJ.9D45
  • Open Location Code: 9C3XFG82+R3
  • Maidenhead Locator System: IO91sl02
  • Environment Agency Location ID: 2868TH
  • Environment Agency Gauge ID: 2868TH-level-stage-i-15_min-mAOD
  • Operational Area: Colne
  • Catchment Area: Colne
  • UK Hydrometric Area: Thames
  • Environment Agency Region: Thames
  • Level Datum: Above Ordnance Datum (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 Stanwell Gate 1 (Lake Offtake) Monitoring Station is between 18.42m and 18.79m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Stanwell Gate 1 (Lake Offtake) Monitoring Station over the past 12 months has been between 18.55m and 18.75m. It has been between these levels for at least 188 days in the past year.

Nearby Monitoring Locations

There are no other monitored rivers nearby

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