DL2 1AH - Flood, Heat, Air & Subsidence Risk - Mowden (DL2)

Darlington, Mowden (DL2)

Climate risk summary for DL2 1AH

DL2 1AH in Mowden (DL2) has a High flood risk - EA NaFRA2 data records 4 properties at high flood risk. 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: EA NaFRA2: 4 high, 1 medium, 2 low flood risk properties in this postcode.
• 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).
• Green space: 99% of households here have accessible green space within a 15-minute walk (the government's Environmental Improvement Plan standard), and 18% have a park or green space within a 200m walk of their door - near the England median (Defra, 2025).

What is the flood risk in DL2 1AH?

Flood risk at DL2 1AH is rated High, based on Environment Agency NaFRA2 modelling.

Environment Agency flood zone data places DL2 1AH in the high flood risk band. EA NaFRA2 data shows 4 at high risk, 1 at medium risk, 2 at low risk in this postcode. The band reflects the highest flood risk within the postcode; some properties within this postcode may face little or no direct flood risk. A formal flood risk search and review of buildings insurance availability is recommended before any property transaction in this area.

How is the air quality in DL2 1AH?

Air quality at DL2 1AH 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 DL2 1AH?

British Geological Survey data classes the underlying soil at DL2 1AH 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 DL2 1AH draws on four official UK open data sources: Environment Agency NaFRA2 flood modelling, 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 Darlington and is updated as new official datasets are published.

About the Darlington area

Darlington has an inland town setting with surrounding low-lying countryside and experiences cool, wet winters and warm summers, shaped by river floodplains and urban development.

What should buyers and renters check in DL2 1AH?

Practical check: With 4 properties at high flood risk here, ask about past flooding events, check the entrance threshold height relative to road level, and review buildings insurance terms. These are postcode-level indicators - conditions vary between individual properties.

Climate risk can change street by street, so it is worth checking neighbouring postcodes too. The full risk report for DL2 1AA is at localrisk.co.uk/postcode/DL21AA, and you can compare DL2 1AH side by side with any UK postcode at localrisk.co.uk/compare.