Road & rail noise map for Harwich
Town in Essex, Eastern
We analysed 640 postcodes in and around Harwich, Essex against DEFRA's Strategic Noise Mapping (Round 4, 2022). 26% of them (166) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 73% 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 CO12 3JW (road noise 65.0–69.9 dB by day).
Noise map of Harwich
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 | 17% (108) | 10% (65) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 8% (54) | 5% (29) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | <1% (4) | <1% (2) |
| 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% | 85% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (2) | <1% (6) |
| 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% | 99% |
Share of the 640 postcodes within ~5 km of the Harwich centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Harwich
Check a specific postcode
Example searches: CO12 3JW · CO12 5DN · CO12 3HF · CO12 3HS · CO12 3AT · CO12 3AB
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 Harwich?
- We analysed 640 postcodes in and around Harwich, Essex against DEFRA's Strategic Noise Mapping (Round 4, 2022). 26% of them (166) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 73% 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 CO12 3JW (road noise 65.0–69.9 dB by day).
- Where is the most road noise in Harwich?
- The postcodes with the highest modelled daytime levels in and around Harwich are CO12 3JW, CO12 3HF, CO12 3HS, based on DEFRA's 2022 model of major roads and railways.