Risk assessment – flooding is the only natural hazard

  • Created:
  • Reference: KBCN1552

Where:

  • Flooding is the only natural hazard identified and,
  • The flood risk assessment (FRA) from Rsl 01 is used as evidence for this issue,

then Answer D (‘the asset is in an area where no risks exist’) is only available where the FRA shows zero or low flood risk from all sources of flooding listed within criterion 1 of RSL01 with the exception of:
d) Groundwater: most common in low-lying areas underlain by permeable rock (aquifers)
e) Sewers: combined, foul or surface water sewers

Assessing flood risk from rivers and seas only does not cover all risks.

13 November 2025 Updated to exclude groundwater and sewers from the requirements for Rsl03.