Environment Agency monitoring station
Tongham
River Blackwater · Ash · Loddon catchment
EA station reference
2419TH
Live measurement feed
Water level over the last seven days
Readings show measured change at this instrument. A station reading is not a flood warning and, without an official threshold, does not prove that the river is safe or dangerous.
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Station location
Blue point = monitoring instrument, not a reported flood.
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About this station
- Monitors
- River Blackwater
- Catchment
- Loddon
- Nearest named place
- Ash
- EA opening date
- 1 January 2006
- Coordinates
- 51.23734, -0.73629
Nearby designated monitoring areas
Directory areas whose reference point is within approximately 10 km. Proximity does not mean this station controls that area or that a warning is active.
- Upper River Wey including Alton, Farnham, Bordon, Frensham, Tilford, Godalming, Guildford and PeasmarshDesignated alert area · EA ref 061WAF30UpperWey
- River Wey at Elstead and Eashing, SurreyDesignated warning area · EA ref 061FWF30Eashing
- River Wey at Tilford, SurreyDesignated warning area · EA ref 061FWF30Tilford
- Communities at risk of groundwater flooding in the Crondall areaDesignated alert area · EA ref 061FAG24Crondall
- Cove Brook at Farnborough including Hawley Bridge, HampshireDesignated warning area · EA ref 061FWF24Cove
- River Wey at Farnham and Waverley Abbey, SurreyDesignated warning area · EA ref 061FWF30Farnham
- River Blackwater at Aldershot and Farnborough including Lakeside Park, Ash Vale, Farnborough Park and Mytchett, Hampshire and SurreyDesignated warning area · EA ref 061FWF24Aldersht
- River Blackwater at Badshot LeaDesignated warning area · EA ref 061FWF24BadshLea
- Cove Brook at West Farnborough including West Heath and RafboroughDesignated warning area · EA ref 061FWF24WestHth
- Properties at Mill Lane, Rapleys Field and Law MeadowsDesignated warning area · EA ref 061FWF30Pirbrght
Nearby monitoring stations
Use nearby instruments for context, but do not compare absolute station-datum values as if they shared the same baseline.
Source and limits: station directory and readings from the Environment Agency under the Open Government Licence v3.0. API readings can be delayed or unavailable. For warnings and emergency advice, use the official GOV.UK flood service.