York YO1 postcode area

Area evidence, not a full-postcode grade

The YO1 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 YO1: 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.

• York769 residents/km²UK council density percentile: 56/100

Preparedness conclusion for YO1

Check the named incident area rather than applying a York warning to the whole district.

York is 482 residents/km² above the UK average of 287 residents/km².

York's local authority figure includes areas outside YO1. If a warning names only part of the centre or a particular crossing, the authority average cannot show which side of the disruption you are on. The Environment Agency service gives the current warning area.

Local flood evidence for YO1

Recorded flooding

The Environment Agency’s Boxing Day 2015 timeline records rising levels on both the Ouse and the Foss and about 600 properties flooding. It identifies the warning for Huntington Road and Foss Islands during the incident. The timeline is useful for understanding why notices for the two rivers should be read separately.

Official warning area

The Environment Agency has a named River Ouse warning area for York city centre. The River Foss has its own alerts and warnings. Check which river and mapped area the notice names before applying it to a YO1 address, bridge approach or walking route.

Data & Preparedness Score 6/6

Warning coverage 2/2

A named official warning or alert area is documented locally. Check the mapped boundary for your address.

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.

Emergency information for YO1

When planning a visit or a household meeting point, note the full address and how you will contact someone if your usual route is unavailable. Check current official instructions before travelling.

City of York Council explains what to do during a flood and links to emergency information. Use its current notices if your plans depend on a city-centre approach or crossing. The location in a warning and the roads or paths needed to reach it may need separate checks.

• City of York Council advice during a flood
• UK Emergency Alerts
• UK government household preparedness

Check a full YO1 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