CH8 7AR - Flood, Heat, Air & Subsidence Risk - Treffynnon

Flintshire, Treffynnon

Climate risk summary for CH8 7AR

Heat risk is Lower, with a median (50th percentile) of 13 days above 25°C per year, averaged over the 2021-2040 period under the RCP8.5 high emissions scenario (Met Office UKCP18). Air quality is Low at PM2.5 5.5 μg/m³, above the WHO annual guideline of 5 μg/m³ (Defra UK-AIR). Ground conditions are Low risk, with Glacial Till geology; shrink-swell risk is classed as improbable (BGS GeoClimate).

• Flood: No flood-risk band is published for this postcode in the current dataset releases - a data-coverage gap rather than a rating. The national agencies' address-level flood services cover every property.
• Heat: Projected 13 days above 25°C per year, 2021-2040 average (Met Office UKCP18, 50th percentile under RCP8.5, 12 km grid - postcodes within the same grid cell share this value).
• Air quality: PM2.5 5.5 µg/m³ - above the WHO annual guideline of 5 µg/m³ (Defra UK-AIR PCM model, council-level average - every postcode in this council shows this value).
• Ground: BGS data: Glacial Till geology. Shrink-swell risk classed as improbable (British Geological Survey).

What is the flood risk in CH8 7AR?

An official flood-risk band is not available for CH8 7AR in the current dataset releases used by LocalRisk. This is a data-coverage gap rather than a low-risk rating. For a property-level reading, Natural Resources Wales' Flood Risk Assessment Wales map covers every address in Wales.

How is the air quality in CH8 7AR?

Air quality at CH8 7AR is rated Low, based on Defra UK-AIR annual mean PM2.5 data. Fine particulate matter (PM2.5) comes primarily from road traffic, industry, and domestic burning. Long-term exposure above the WHO guideline of 5 µg/m³ is linked to respiratory and cardiovascular health risks. Buyers and renters in higher air quality risk areas may wish to consider whether the property is near busy roads or industrial sources.

Is subsidence a risk at CH8 7AR?

British Geological Survey data classes the underlying soil at CH8 7AR as Glacial Till, with shrink-swell hazard rated improbable (subsidence risk band: Low). A structural survey is the reliable way to assess ground conditions for a specific property.

Where does this data come from?

This LocalRisk report for CH8 7AR draws on four official UK open data sources: Natural Resources Wales flood mapping, Met Office UKCP18 climate projections, Defra UK-AIR PM2.5 monitoring, and British Geological Survey GeoClimate subsidence mapping. Risk ratings are a screening tool, complementing - not replacing - the searches and surveys ordered as part of a property transaction. Data covers Flintshire and is updated as new official datasets are published.

About the Flintshire area

Flintshire has a mixed coastal, industrial and rural setting along the Dee estuary and inland valleys and experiences cool, wet winters and mild summers, influenced by estuarine conditions and rising ground.

Climate risk can change street by street, so it is worth checking neighbouring postcodes too. The full risk report for CH8 7AA is at localrisk.co.uk/postcode/CH87AA, and you can compare CH8 7AR side by side with any UK postcode at localrisk.co.uk/compare.