Official Data

The data for the following river and rain gauges is 'official' and is gathered from the Environment Agency's official data feed:

• Frilsham
• Bucklebury
• Tidmarsh
• Pangbourne
• Sulham
• West Ilsley rain
• Yattendon rain

While the level data is gathered every 15 minutes, it is not always published by the EA every 15 minutes and can take up to 24 hours to be released.

The level of the Tidmarsh gauge shown here has been adjusted by subtracting 100cm.

Unofficial Data - Automatic

The data for the following gauges is 'unofficial':

• Sulham A329

This unofficial data is recorded automatically using an ultrasonic gauge installed by the PVFF. It is subject to an error of about +/- 1cm. A reading is taken every 24 hours.

Unofficial Data - Manual

The data for the following gauges is 'unofficial'. This data is recorded by selected Pang Valley residents:

• Stanford Dingley
• ORC - Old Rectory Cottage (between Tidmarsh and Pangbourne)

This unofficial data is recorded from a gauge board at the side of the river. It is subject to an error of about +/- 1cm. It is not recorded continually and thus for now, is shown as points rather than lines.

The official and unofficial data is shown together for ease of use by Pang Valley residents.

Gauge / Alert	1	2	3	4
Frilsham	44	48	59	62
Bucklebury	55	65	72	80
Tidmarsh	145	156	170	190
Pangbourne	75	78	110	140
Sulham	30	40	75	106

Values are in cm

Alert	Definition	Action
1	River levels are rising	Monitoring and Forecasting Duty Officer starts monitoring
2	River levels are at bankfull	Flood Alerts issued (for whole length of the river) if forecast is for this level to be exceeded.
3	River levels are getting near to flood warning	Consider issuing a Flood Warning (for just the Warning Area associated with the relevant gauge)
4	River level is at property level (first to Flood in Warning Area)	Flood Warning issued (for just the Warning Area associated with the relevant gauge) if forecast is for this level to be exceeded.

Message issued 10/10/2023 6:00pm

The Flood Warning (for Frilsham, Stanford Dingley and Bradfield) and the Flood Alert (for the whole of the Pang and the Sulham Brook) issued this evening by the Environment Agency has been issued in error.

Some members of the Environment Agency river monitoring team are on strike and the issuing of Flood Warnings and Flood Alerts has been automated. A spurious reading from the Frilsham River gauge triggered the alert and warning.

The Environment Agency will remove the Flood Warning and Flood Alert in the next few hours, assuming the same fault doesn't trigger it again.