Road & rail noise map for Dereham
Town in Norfolk, Eastern
We analysed 874 postcodes in and around Dereham, Norfolk against DEFRA's Strategic Noise Mapping (Round 4, 2022). 16% of them (139) have mapped road noise of 55 dB or more by day, and 0% have mapped rail noise. 84% 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 NR19 1WB (road noise 65.0–69.9 dB by day).
Noise map of Dereham
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 | 13% (113) | 5% (40) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 3% (22) | 1% (13) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | <1% (4) | 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 | 84% | 94% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 0% (0) | 0% (0) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 0% (0) | 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 | 100% | 100% |
Share of the 874 postcodes within ~5 km of the Dereham centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Dereham
Check a specific postcode
Example searches: NR19 2AL · NR19 1AA · NR19 1PX · NR19 1WB · NR19 1AH · NR19 1HD
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 Dereham?
- We analysed 874 postcodes in and around Dereham, Norfolk against DEFRA's Strategic Noise Mapping (Round 4, 2022). 16% of them (139) have mapped road noise of 55 dB or more by day, and 0% have mapped rail noise. 84% 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 NR19 1WB (road noise 65.0–69.9 dB by day).
- Where is the most road noise in Dereham?
- The postcodes with the highest modelled daytime levels in and around Dereham are NR19 1WB, NR19 1PX, NR19 2AL, based on DEFRA's 2022 model of major roads and railways.