PH38 4NB - Flood, Heat, Air & Subsidence Risk - Mallaig

Highland, Mallaig

Climate risk summary for PH38 4NB

PH38 4NB in Mallaig has a Medium flood risk. Heat risk is Lower, with a median (50th percentile) of 3 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 3.8 μg/m³, within the WHO annual guideline of 5 μg/m³ (Defra UK-AIR). Ground conditions are Low risk, with Psammite Or Arenite geology; shrink-swell risk is classed as improbable (BGS GeoClimate).

• Flood: Flooding is possible during severe weather. Routine checks help.
• Heat: Projected 3 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 3.8 µg/m³ - within 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: Psammite Or Arenite geology. Shrink-swell risk classed as improbable (British Geological Survey).

What is the flood risk in PH38 4NB?

Flood risk at PH38 4NB is rated Medium, based on SEPA flood mapping.

SEPA flood zone data places PH38 4NB in the medium flood risk band. The band reflects the highest flood risk within the postcode; some properties within this postcode may face little or no direct flood risk. Individual properties within PH38 4NB can differ - a formal flood risk search is recommended before any property transaction.

How is the air quality in PH38 4NB?

Air quality at PH38 4NB 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 PH38 4NB?

British Geological Survey data classes the underlying soil at PH38 4NB as Psammite Or Arenite, 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 PH38 4NB draws on four official UK open data sources: SEPA 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 Highland and is updated as new official datasets are published.

About the Highland area

Highland spans a vast and varied landscape of mountains, glens, rivers and long coastlines, from Inverness on the Moray Firth to remote western and northern shores, and experiences cool, wet winters and mild summers, influenced by elevation, Atlantic weather systems and maritime exposure.

Climate risk can change street by street, so it is worth checking neighbouring postcodes too. The full risk report for PH38 4LZ is at localrisk.co.uk/postcode/PH384LZ, and you can compare PH38 4NB side by side with any UK postcode at localrisk.co.uk/compare.