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Haydock, St. Helens
Up to Low likelihood
Properties in WA11 0UY sit in the Environment Agency's Low flood-likelihood band (worst property). The band is the worst found in the postcode — it describes the land around properties (defence-adjusted, rivers & sea), not any single address, and not today's conditions.
| Likelihood band | Annual chance | Properties | Of which homes |
|---|---|---|---|
| High | greater than 3.3% | 0 | 0 |
| Medium | 1% – 3.3% | 0 | 0 |
| Low | 0.1% – 1% | 4 | 3 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a low-likelihood area has a 2–22% chance of flooding at least once.
WA11 0UY gets about 934 mm of rain a year on average (wettest month December, 97 mm; driest April, 56 mm). That is 20% drier than the UK as a whole, which averages 1,163 mm a year.
A thirty-year average for the surrounding area, not a measurement at this address and not a flood risk on its own: a dry area floods when a storm sits over it, and a wet one may drain away perfectly well. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.3 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
The ground here sits at about 43 m above sea level and falls 23 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the north-north-west, 1.9 m higher.
The river map has no watercourse within 1 km of the centre of WA11 0UY.
That means this spot is not on the river map, not that there is no water here: Ordnance Survey’s river map (OS Open Rivers) leaves out small streams, ditches and culverts. Contains OS data © Crown copyright and database rights 2026.
Because properties in the low likelihood band; 2 recorded flood outlines mapped nearby; 176 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around WA11 0UY. The small panels are illustrative previews of the report's per-layer map views — the full report draws each layer for real, plus recorded extents, defences and a building picker on an interactive map.
Warnings cover flood areas, not individual addresses.
| Date | Mapped flood extent | Approx. distance |
|---|---|---|
| Jun 2002 | CLIP | ~0.1 km |
| Jun 2002 | EA01316_14 June 2002_Clipsley Brook_121SlagLane | ~0.1 km |
These are extents the Environment Agency has mapped, not a list of every flood. Records, not floods: no outline on the record is not evidence a place has not flooded. The full report tests whether any extent covered the exact spot.
Christoph (2021, 20 warnings nearby) ▶ replay it here · Barra (2021, 4 warnings nearby) ▶ replay it here · Bert (2024, 2 warnings nearby) ▶ replay it here · Franklin (2022, 2 warnings nearby) ▶ replay it here
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Haydock West End Road | Black Brook | 1.9 km | 1.60 m | — |
| Ivy Street, Ashton-In-Makerfield | Millingford Brook | 3.1 km | 1.76 m | 2.01 m |
| Lincoln Drive | Millingford Brook | 3.7 km | 1.90 m | 2.52 m |
| Ellamsbridge Road, St Helens | Sutton Mill Brook | 4.2 km | 1.10 m | 1.29 m |
Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.
| Overflow | Discharges into | Distance | Spills | Hours |
|---|---|---|---|---|
| Vicarage Road | Clipsley Brook | 1.0 km | 7 (2024) | 22 |
| Grange Valley | Freshwater Stteam | 1.3 km | 2 (2024) | 1 |
| Troutbeck Road Cso 508b3 | Millingford Brook | 1.8 km | 0 (2024) | 0 |
| Malvern Road Cso (42052) | Sankey Brook | 1.9 km | 34 (2024) | 73 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
11 mapped flood-defence assets within 500 m — nearest ~78 m (natural high ground). Defences reduce risk, never remove it.
The interactive flood-risk map with a building picker (your exact house, not the postcode), the 2050s climate view, surface-water and planning flood zones at your building, exact recorded-flood distances, year-by-year warning charts, watercourses including culverted streams, an insurance outlook with the Flood Re rules, and a printable document with every dataset receipt — start with the free preview, unlock for £19.
At-risk postcodes near WA11 0UY — all in the WA11 district.
© Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064. 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. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring (England); live overflow status © the water companies, incl. Dŵr Cymru Welsh Water and Scottish Water. Flood defences © Environment Agency (OGL v3). This page summarises public area-level data — it is not a flood-risk survey and not a substitute for the official GOV.UK service. All data sources & licences. More postcodes: the WA11 district.