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Conditions are worth watching: heavy rain has fallen nearby (15.1 mm in the last 24 hours at Rainfall station). Keep an eye on updates if heavy rain continues.
Updated 2026-10-09 15:11:06 UTC · Official GOV.UK warnings · Flood preparation & help guide
Dallam is a suburb of Warrington, in the Warrington district, in the ceremonial county of Cheshire, England. It was historically in Lancashire but is now in Cheshire. It is home to a Royal Mail rail terminus on the main West Coast Main Line railway, opposite a large Eddie Stobart distribution centre. Most housing is former council housing. It is situated at the terminus of the Warrington Borough Transport number 16 and 16A bus routes.
Towns and villages near Dallam with a page of their own: the homes in a flood risk area there, the nearest river gauges, and recorded floods.
Golborne · Runcorn · Lymm · St Helens · Widnes · Leigh
Place names: Contains OS data © Crown copyright and database rights 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
The nearest watercourse on the river map is Sankey Brook, about 10 m from the middle of Dallam's gauges. It flows into the River Mersey about 5.0 km downstream.
A gauge downstream shows water that has already passed this point; one upstream sees it first. Distances along the river are from the point on Sankey Brook nearest the middle of Dallam's gauges. From Ordnance Survey’s river map (OS Open Rivers), which leaves out small streams, ditches and culverts, so a nearer one may exist. This describes where water goes on the map; it says nothing about flooding at any address. Contains OS data © Crown copyright and database rights 2026.
Dallam is monitored by 1 Environment Agency river level station on the Sankey Brook, in Warrington. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The Sankey Brook is monitored by 1 station (Higham Avenue). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 8 Environment Agency flood warning areas within 10km of Dallam. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: Areas at risk include Chepstow Close, Colwyn Close, properties on and around Higham Avenue, Tavlin Avenue, Hodgkinson Avenue, Marshall Avenue, Hawleys Lane and Mullen Close; Areas at risk include properties between Callands Rd and Sankey Brook. Other areas at risk include Marshall Avenue, Hawleys Lane, Southworth avenue, Charter avenue and Longshore Street from Hawleys Lane to the allotments; Areas at risk include commercial and retail property off Europa Boulevard at Gemini Industrial Park. Additional properties at risk include parts of Fairbourne close.; The Bank Quay area of Warrington is at risk of flooding from the Estuary due to high tides. Areas at risk includes industrial units behind the railway embankment at Bank Quay Station next to the Estuary and property around the Atherton Quay area.
There are 35 storm overflows within 5km of Dallam. 2 are currently discharging. Enable "Sewage" on the map above to see their locations.
6 of them, nearest first, with their own page of live status and past discharges:
If flooding is forecast in Dallam, call Floodline on 0345 988 1188 for the latest information. Move valuables upstairs, turn off gas and electricity if safe to do so, and avoid walking or driving through flood water. Sign up for flood warnings on any station page above to receive email alerts when water levels rise. For emergency numbers, a preparation checklist and insurance guidance, see our flood help & preparation guide.
Dallam gets about 862 mm of rain a year on average (wettest month October, 94 mm; driest March, 52 mm). That is 26% drier than the UK as a whole, which averages 1,163 mm a year. See the rain gauges →
A thirty-year average for the area, not a forecast and not a flood risk on its own. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 3.0 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of the town centre — most recent first. These are records of mapped extents, not a full list of floods. See them on the map →
Records, not floods: no outline on the record is not evidence a place has not flooded.
Current verdict: Watch. Conditions are worth watching: heavy rain has fallen nearby (15.1 mm in the last 24 hours at Rainfall station). Keep an eye on updates if heavy rain continues.
Dallam has river level monitoring on Sankey Brook — 1 monitoring station in total.
Use the GOV.UK Check for Flooding service (check-for-flooding.service.gov.uk) or call Floodline on 0345 988 1188 (24 hours). You can also set up free FloodRadar email or browser alerts from any station page above.
Follow official advice: move valuables and vehicles to safety, never walk or drive through flood water, turn off gas and electricity if safe, and check on vulnerable neighbours. See our flood preparation guide at floodradar.co.uk/flood-help.
Yes — the Environment Agency's Recorded Flood Outlines dataset shows 63 recorded flood extents around the town centre since 1703, most recently in 2021. That is a count of mapped extents, not of separate floods. Records, not floods: no outline on the record is not evidence a place has not flooded. See the flood history link below.
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