Road & rail noise map for Blackwater
Town in Hampshire, South East
We analysed 506 postcodes in and around Blackwater, Hampshire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 20% of them (101) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 80% 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 GU15 3DL (road noise 70.0–74.9 dB by day).
Noise map of Blackwater
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% (68) | 6% (28) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 5% (25) | 3% (17) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 1% (7) | <1% (4) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (1) | 0% (0) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 80% | 90% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (1) | <1% (1) |
| 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 506 postcodes within ~5 km of the Blackwater centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Blackwater
Check a specific postcode
Example searches: GU15 3DL · GU17 9AA · GU15 3DH · GU17 0AA · GU17 0AB · GU17 9AD
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 Blackwater?
- We analysed 506 postcodes in and around Blackwater, Hampshire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 20% of them (101) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 80% 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 GU15 3DL (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Blackwater?
- The postcodes with the highest modelled daytime levels in and around Blackwater are GU15 3DL, GU17 9AP, GU17 9AA, based on DEFRA's 2022 model of major roads and railways.