London Colney Flood Risk
London Colney has a High flood risk from rivers and the sea , with 4.9% of homes in a Medium or High band. The nearest gauge is 0.6 km away.
London Colney has 8,331 residents and 3,605 homes. Ranked 801 of 7,114 in England for rivers and sea flood risk.
What Is The River Level Near London Colney Right Now?
Read from the Environment Agency flood-monitoring feed at 20 Sept, 14:34 UTC. The highest level on record here is 2.722 m , reached on 30 October 2000.
When Has London Colney Flooded Before?
The Environment Agency holds 4 recorded flood outlines covering London Colney, the most recent dated 10 February 2009.
Absence of a record is not evidence that a place has never flooded — the Environment Agency states that a lack of coverage does not mean an area has never flooded.
What Does London Colney's Flood Risk Classification Mean?
6.2% of postcodes in London Colney sit in Flood Zone 3, the planning band for land with a 1% or greater annual chance of river flooding or 0.5% or greater of sea flooding — and the map that draws it deliberately ignores flood defences.
The flood risk band for rivers and the sea is High , with 4.9% of homes in a Medium or High band. Unlike the Flood Zone, the band counts the defences that are actually in place, which is why the two can describe the same street differently and both be right.
Which Postcode Districts Cover London Colney?
Each district below is one postcode district that falls inside London Colney. The band is the one shared by most of that district's postcodes, so it describes the district rather than a single street — enter a full postcode in the checker for one address. A district can cover more than one town: every district here overlaps another place, so the checker may name a neighbouring town for some of these postcodes.
| Postcode district | Postcodes here | Rivers and sea band | Surface water addresses |
|---|---|---|---|
| AL2 | 203 | Low | 444 |
| AL1 | 6 | Low | 7 |
| AL4 | 1 | Not mapped — no rivers-and-sea band covers this district | not published for this district |
"Not mapped" is not "no risk". It means no rivers-and-sea band covers that district in the source — surface water can still flood it, and both Camden and Islington flooded from surface water in July 2021 while carrying no mapped rivers-and-sea band.
How Does Flood Risk Affect Insurance And Buying In London Colney?
A High flood risk band can affect the price, the excess and the availability of home insurance, and it is worth checking before you buy. Flood cover is normally part of standard home insurance, and insurers set their own prices.
How insurers price flood risk, what Flood Re covers, and what to do if a standard insurer declines.
The eight statutory conditions, with an eligibility checker that gives a real verdict.
Barriers, airbricks, pumps and non-return valves, ranked by what they protect against.
This site is not authorised by the Financial Conduct Authority and gives no advice. It explains the market and links to regulated intermediaries.
What Else Is Near London Colney?
Other places on the River Colne, nearest to London Colney first.