Road & rail noise map for Chippenham
Town in Wiltshire, South West
We analysed 1,241 postcodes in and around Chippenham, Wiltshire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 15% of them (182) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 85% 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 SN15 2NX (road noise 70.0–74.9 dB by day).
Noise map of Chippenham
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 | 10% (126) | 6% (75) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 3% (38) | 2% (30) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 1% (17) | <1% (10) |
| 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 | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 85% | 91% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (2) | <1% (2) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (1) | <1% (1) |
| 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 | 100% | 100% |
Share of the 1,241 postcodes within ~5 km of the Chippenham centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Chippenham
Check a specific postcode
Example searches: SN15 2NX · SN15 1HD · SN14 6BH · SN14 6BQ · SN14 6LZ · SN14 6HU
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 Chippenham?
- We analysed 1,241 postcodes in and around Chippenham, Wiltshire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 15% of them (182) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 85% 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 SN15 2NX (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Chippenham?
- The postcodes with the highest modelled daytime levels in and around Chippenham are SN15 2NX, SN15 1HN, SN15 1JZ, based on DEFRA's 2022 model of major roads and railways.