Road & rail noise map for Grantham
Town in Lincolnshire, East Midlands
We analysed 1,282 postcodes in and around Grantham, Lincolnshire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 24% of them (306) have mapped road noise of 55 dB or more by day, and 1% 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 NG31 6BG (road noise 70.0–74.9 dB by day).
Noise map of Grantham
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 | 12% (149) | 5% (70) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 6% (76) | 8% (101) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 6% (73) | 2% (25) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (8) | <1% (4) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 76% | 84% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 1% (14) | <1% (3) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (3) | 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 1,282 postcodes within ~5 km of the Grantham centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Grantham
Check a specific postcode
Example searches: NG31 6BA · NG31 6ED · NG31 6AE · NG31 6AF · NG31 6BG · NG31 6JW
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 Grantham?
- We analysed 1,282 postcodes in and around Grantham, Lincolnshire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 24% of them (306) have mapped road noise of 55 dB or more by day, and 1% 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 NG31 6BG (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Grantham?
- The postcodes with the highest modelled daytime levels in and around Grantham are NG31 6BG, NG31 6ED, NG31 6AE, based on DEFRA's 2022 model of major roads and railways.