Road & rail noise map for Leiston
Town in Suffolk, Eastern
We analysed 330 postcodes in and around Leiston, Suffolk against DEFRA's Strategic Noise Mapping (Round 4, 2022). 26% of them (86) have mapped road noise of 55 dB or more by day, and 0% have mapped rail noise. 74% 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 IP16 4DY (road noise 60.0–64.9 dB by day).
Noise map of Leiston
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 | 22% (72) | 8% (26) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 4% (14) | 2% (7) |
| 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 | 74% | 90% |
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 330 postcodes within ~5 km of the Leiston centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Leiston
Check a specific postcode
Example searches: IP16 4DN · IP16 4DY · IP16 4AA · IP16 4BX · IP16 4AU · IP16 4EL
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 Leiston?
- We analysed 330 postcodes in and around Leiston, Suffolk against DEFRA's Strategic Noise Mapping (Round 4, 2022). 26% of them (86) have mapped road noise of 55 dB or more by day, and 0% have mapped rail noise. 74% 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 IP16 4DY (road noise 60.0–64.9 dB by day).
- Where is the most road noise in Leiston?
- The postcodes with the highest modelled daytime levels in and around Leiston are IP16 4DY, IP17 3LY, IP17 1NY, based on DEFRA's 2022 model of major roads and railways.