Road & rail noise map for Bath
City in Bath and North East Somerset, South West
We analysed 3,035 postcodes in and around Bath, Bath and North East Somerset against DEFRA's Strategic Noise Mapping (Round 4, 2022). 24% of them (717) have mapped road noise of 55 dB or more by day, and 2% have mapped rail noise. 75% 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 BA1 1SS (road noise 70.0–74.9 dB by day).
Noise map of Bath
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 | 11% (348) | 5% (139) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 5% (148) | 6% (186) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 6% (172) | 4% (114) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | 2% (49) | <1% (19) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 76% | 85% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (30) | <1% (30) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (19) | <1% (16) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | <1% (4) | <1% (3) |
| 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 | 98% | 98% |
Share of the 3,035 postcodes within ~5 km of the Bath centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Bath
Check a specific postcode
Example searches: BA1 1LA · BA1 1PE · BA1 1BG · BA1 1JP · BA1 1LP · BA1 1SS
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 Bath?
- We analysed 3,035 postcodes in and around Bath, Bath and North East Somerset against DEFRA's Strategic Noise Mapping (Round 4, 2022). 24% of them (717) have mapped road noise of 55 dB or more by day, and 2% have mapped rail noise. 75% 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 BA1 1SS (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Bath?
- The postcodes with the highest modelled daytime levels in and around Bath are BA1 1SS, BA1 6PJ, BA1 1TR, based on DEFRA's 2022 model of major roads and railways.