Environment Agency monitoring directory
The River Colne at Rickmansworth including Batchworth, Money Hill and Maple Cross
Live Environment Agency feed
Is an official warning active now?
Official area details
- Watercourse or coast
- River Colne
- Directory county
- Hertfordshire
- EA operational area
- Greater London, Hertfordshire, Hillingdon
- Coverage category
- Designated Flood Warning Area
Use this information safely
- For conditions now: use the live panel and verify on the official flood service.
- For a property: use the official long-term risk checker; this directory is not address-level evidence.
- For river levels: open a nearby monitoring station and check the reading time.
- For immediate danger: follow emergency-service instructions and call 999.
Nearby river-level stations
These are measuring instruments, not reported flood locations. A station reading must be interpreted with its timestamp, station datum and any official threshold context.
Nearby designated monitoring areas
The Upper River Colne and Radlett Brook at Colney Heath, London Colney, Borehamwood and Radlett
River Colne · designated alert area
The River Colne at Colney Heath including North Mymms
River Colne · designated warning area
The River Colne at London Colney including Colney Street and Broad Colney
River Colne · designated warning area
The Middle River Colne at Watford and Rickmansworth including Carpenders Park
River Colne · designated alert area
The River Colne at Watford including Bushey
River Colne · designated warning area
Property and insurance decisions
Inclusion in an EA monitoring area does not by itself establish a property's flood probability, insurance eligibility or premium. Check the address-level official service and ask the insurer or a qualified surveyor about the property.
Read the flood insurance guide →