Road & rail noise map for Harleston
Town in Norfolk, Eastern
We analysed 349 postcodes in and around Harleston, Norfolk against DEFRA's Strategic Noise Mapping (Round 4, 2022). 19% of them (66) have mapped road noise of 55 dB or more by day, and 0% have mapped rail noise. 81% 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 IP20 0EP (road noise 60.0–64.9 dB by day).
Noise map of Harleston
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 | 16% (57) | 2% (6) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 3% (9) | 1% (5) |
| 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 | 81% | 97% |
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 349 postcodes within ~5 km of the Harleston centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Harleston
Check a specific postcode
Example searches: IP20 0JF · IP20 0JJ · IP20 0AT · IP20 0EP · IP20 0JG · IP21 4AW
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 Harleston?
- We analysed 349 postcodes in and around Harleston, Norfolk against DEFRA's Strategic Noise Mapping (Round 4, 2022). 19% of them (66) have mapped road noise of 55 dB or more by day, and 0% have mapped rail noise. 81% 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 IP20 0EP (road noise 60.0–64.9 dB by day).
- Where is the most road noise in Harleston?
- The postcodes with the highest modelled daytime levels in and around Harleston are IP20 0EP, IP20 0AT, IP21 5TU, based on DEFRA's 2022 model of major roads and railways.