POSTCODE DISTRICT · ENGLAND

Cambridge CB1 postcode area

Read the preparedness conclusion for CB1 in Cambridge, check which council figures apply and find the official warning service for this location.

DISTRICT REPORT SCOPE

Area evidence, not a full-postcode grade

The CB1 prefix covers multiple addresses and may cross council or warning-area boundaries. The 0–6 Data & Preparedness Score below counts documented sources for this district. It is separate from the conditional A–G disruption grade on a full-postcode report.

A–G grade for CB1: not assessed at district level. A complete postcode is needed to check live utility and road incidents and listed emergency-care distance. A grade appears only when all three inputs can be scored. How the full-postcode grade works.

Population density compared with the UK

UK average: 287 residents/km². Figures below cover the named councils.

Cambridge3,683 residents/km²UK council density percentile: 86/100
South Cambridgeshire194 residents/km²UK council density percentile: 22/100

ONS mid-2025 population estimates · MYE5

Preparedness conclusion for CB1

Check which council covers your address and which organisation manages your premises.

Cambridge is 3,396 residents/km² above the UK average of 287 residents/km². South Cambridgeshire is 93 residents/km² below the UK average of 287 residents/km².

The CB1 district includes addresses associated with Cambridge and South Cambridgeshire. A comparison of their density tells you how their wider populations are distributed. It does not show whether instructions for a university building, a station or a neighbourhood apply at your address.

Check current flooding in England

Local flood evidence for CB1

Recorded flooding

Cambridge's strategic flood assessment lists a groundwater flooding record on Coleridge Road on 19 February 2010. Coleridge Road includes CB1 addresses, but this street record is not evidence of flooding throughout CB1.

Cambridge City Council historic flood records appendix

Official flood source and coverage limit

The Environment Agency lists a River Cam at Cambridge warning area. Its mapped river corridor should be checked against the full CB1 address; the listing alone does not confirm that the Coleridge Road record falls inside that warning boundary.

EA River Cam at Cambridge warning area

Data & Preparedness Score 5/6

Several useful sources are available. Check the gaps below. The score describes the evidence available in this report. It does not measure risk, safety or personal readiness.

Warning coverage 1/2: An official service is linked. A named local warning or alert area has not been verified for this page.
Official guidance 2/2: Local authority or regional preparedness guidance is linked below.
Data completeness 2/2: Council density is available. A local flood record is documented.

How the district score is calculated

Warning coverage earns 2 points for a documented local warning area, 1 for an official service link and 0 when no source can be identified. Guidance earns 2 for a local authority or regional preparedness link, 1 for UK guidance and 0 when neither is available.

Data completeness earns 2 points when council density and a documented local flood record are both available, 1 for either and 0 for neither. The three scores are added. The number or severity of current warnings does not change the score.

Emergency information for CB1

If you switch between a workplace and accommodation, keep both addresses available offline. Check the location given in an alert before forwarding it to people elsewhere in the district.

Cambridge City Council's emergency guidance covers major incidents and instructions to shelter or move when directed. Groundwater on Coleridge Road and a River Cam warning are different mechanisms and should not be conflated.

Check a full CB1 postcode

Enter the complete postcode, including its final three characters, to see the nine-indicator evidence breakdown, any supported provisional A–G grade, local incident results and a check against official flood-warning boundaries.

How the nine indicators apply

A district prefix covers many full postcodes. This page has no live A–G disruption grade and does not assess war or nuclear risk. Enter a complete postcode above to see the nine-indicator breakdown for its returned location.

Can contribute to a full-postcode grade: Infrastructure: matched electricity or water incidents where covered. Medical resources: straight-line distance to a listed emergency department. Road access: nearby active TfL events where covered. Missing feeds are excluded, not scored as zero.
Can be shown, without a risk score: Wind direction and speed, one-hour rainfall forecast, and elevation with sampled local relief. These do not establish exposure to a particular incident or protection at a building.
No verified postcode-level assessment: Military targeting, building structure and designated shelter availability. A postcode prefix cannot supply these details.

Full scoring method · Compare full postcodes · UK Emergency Alerts