Road & rail noise map for Chichester
City in West Sussex, South East
We analysed 1,800 postcodes in and around Chichester, West Sussex against DEFRA's Strategic Noise Mapping (Round 4, 2022). 30% of them (538) have mapped road noise of 55 dB or more by day, and 1% have mapped rail noise. 69% 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 PO19 8DJ (road noise 70.0–74.9 dB by day).
Noise map of Chichester
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 | 18% (332) | 7% (121) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 8% (148) | 7% (132) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 3% (54) | 1% (22) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (4) | <1% (1) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 70% | 85% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 1% (21) | 1% (19) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (2) | <1% (6) |
| 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 1,800 postcodes within ~5 km of the Chichester centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Chichester
Check a specific postcode
Example searches: PO19 8EH · PO19 8QG · PO19 1JH · PO19 8DJ · PO18 0BP · PO18 0DG
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 Chichester?
- We analysed 1,800 postcodes in and around Chichester, West Sussex against DEFRA's Strategic Noise Mapping (Round 4, 2022). 30% of them (538) have mapped road noise of 55 dB or more by day, and 1% have mapped rail noise. 69% 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 PO19 8DJ (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Chichester?
- The postcodes with the highest modelled daytime levels in and around Chichester are PO19 8DJ, PO19 8EH, PO19 1JH, based on DEFRA's 2022 model of major roads and railways.