Watford

102,246 people · median £402,000

Watford Council · Liberal Democrat (directly-elected mayor) 32/36 seats · 89% · OCD 2026

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Environment This district

NO₂

12.8

— WHO guide

PM2.5

7.8

— WHO guide

µg/m³ annual mean · DEFRA

Surface water 1-in-1002.3%

Flood zone1.1% of postcodes

RadonAffected Area (up to 5–10%)

Historic landfill42 sites within ~1 km

EA · UKHSA/BGS · Mining Remediation Authority — indicative, not a property search

Road & rail noise bands (≥55 / ≥65 dB Lden) are being added — not yet available for this area. They cover major sources only; "not mapped" ≠ "quiet".

Defra strategic noise mapping

Listed buildings94

Conservation areas10

Green belt17.8%

Green spaces69

Historic England · OS Open Greenspace

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