Road & rail noise map for St Helens
Town in St. Helens, North West
We analysed 2,438 postcodes in and around St Helens, St. Helens against DEFRA's Strategic Noise Mapping (Round 4, 2022). 30% of them (736) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 69% 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 WA9 1PB (road noise 70.0–74.9 dB by day).
Noise map of St Helens
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 | 19% (464) | 6% (155) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 7% (181) | 6% (147) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 4% (89) | 1% (36) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (2) | 0% (0) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 70% | 86% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (11) | <1% (9) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (1) | <1% (1) |
| 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 2,438 postcodes within ~5 km of the St Helens centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around St Helens
Check a specific postcode
Example searches: WA9 1PB · WA9 1BX · WA10 1UQ · WA10 1AA · WA10 1QP · WA10 1FG
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 St Helens?
- We analysed 2,438 postcodes in and around St Helens, St. Helens against DEFRA's Strategic Noise Mapping (Round 4, 2022). 30% of them (736) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 69% 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 WA9 1PB (road noise 70.0–74.9 dB by day).
- Where is the most road noise in St Helens?
- The postcodes with the highest modelled daytime levels in and around St Helens are WA9 1PB, WA9 1BX, WA10 2JP, based on DEFRA's 2022 model of major roads and railways.