Road & rail noise map for Chorley
Town in Lancashire, North West
We analysed 1,437 postcodes in and around Chorley, Lancashire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 35% of them (498) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 65% 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 PR7 5LR (road noise 75.0 dB or more by day).
Noise map of Chorley
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 | 22% (316) | 7% (104) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 10% (142) | 7% (94) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 3% (38) | <1% (7) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (1) | 0% (0) |
| 75.0 dB or more day · 70.0 dB or more night | <1% (1) | <1% (1) |
| Below mapped bands / not mapped | 65% | 86% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (6) | <1% (5) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (2) | <1% (3) |
| 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% | 99% |
Share of the 1,437 postcodes within ~5 km of the Chorley centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Chorley
Check a specific postcode
Example searches: PR7 5LR · PR6 9AF · PR6 0PY · PR6 0DZ · PR6 0DU · PR6 0DR
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.
Bothered by road or rail noise at home?
Acoustic and secondary glazing typically cuts perceived traffic noise dramatically. We're building a free quote-matching service with vetted installers — leave your email and we'll contact you when it launches.
Nearby areas
Frequently asked questions
- How noisy is Chorley?
- We analysed 1,437 postcodes in and around Chorley, Lancashire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 35% of them (498) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 65% 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 PR7 5LR (road noise 75.0 dB or more by day).
- Where is the most road noise in Chorley?
- The postcodes with the highest modelled daytime levels in and around Chorley are PR7 5LR, PR6 9AF, PR6 9AL, based on DEFRA's 2022 model of major roads and railways.