Road & rail noise map for St Blazey
Town in Cornwall, South West
We analysed 318 postcodes in and around St Blazey, Cornwall against DEFRA's Strategic Noise Mapping (Round 4, 2022). 18% of them (57) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 81% of postcodes have no mapped road or rail noise at all — though that reflects major-source modelling, not guaranteed quiet. The highest modelled level we found is at PL24 2LQ (road noise 65.0–69.9 dB by day).
Noise map of St Blazey
How many postcodes are affected?
Road noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 9% (29) | 6% (20) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 6% (20) | 5% (17) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 3% (8) | 2% (5) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | 0% (0) | 0% (0) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 82% | 87% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (1) | <1% (1) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (1) | 0% (0) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 0% (0) | 0% (0) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | 0% (0) | 0% (0) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 99% | 100% |
Share of the 318 postcodes within ~5 km of the St Blazey centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around St Blazey
Check a specific postcode
Example searches: PL24 2LG · PL24 2NB · PL24 2EB · PL24 2LD · PL24 2LQ · PL24 2NJ
What this data does — and doesn't — cover
- Modelled, not measured.These are DEFRA's computer-modelled estimates (Round 4, 2022), not microphone readings at your door.
- Major sources only. The model covers major roads, major railways and large urban areas. Smaller local roads, neighbours, pubs, building sites and aircraft are not included.
- No mapped noise ≠ quiet. If a location shows no band, it means it falls outside the mapped contours — not that it is silent.
- 2022 snapshot.New roads, developments or traffic changes since 2022 won't show. The next DEFRA round is due around 2027.
More detail on the methodology page.
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Nearby areas
Frequently asked questions
- How noisy is St Blazey?
- We analysed 318 postcodes in and around St Blazey, Cornwall against DEFRA's Strategic Noise Mapping (Round 4, 2022). 18% of them (57) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 81% of postcodes have no mapped road or rail noise at all — though that reflects major-source modelling, not guaranteed quiet. The highest modelled level we found is at PL24 2LQ (road noise 65.0–69.9 dB by day).
- Where is the most road noise in St Blazey?
- The postcodes with the highest modelled daytime levels in and around St Blazey are PL24 2LQ, PL24 2RU, PL24 2SL, based on DEFRA's 2022 model of major roads and railways.