PI's: Water Safety Checks
Stock Condition & Asset Management: Water Safety Checks
BS04: Water safety checks
Rationale, Definition & Worked Example
Below you can find information regarding the rationale, definition and formula for this performance indicator. This includes a worked example to demonstrate how this indicator should be calculated.

Rationale
Note: This TSM metric relates to LCRA and LCHO combined
For full details of the RSH requirements and links to TSM Guidance, click here.
This metric was introduced by the English Regulator of Social Housing (RSH) in April 2023 as one of a suite of Tenant Satisfaction Measures (TSMs). It is a regulatory requirement that all Registered Providers (RPs), regardless of size, collect and report the TSMs to their tenants.
For this TSM, dwelling units includes all such units that require LRAs within the dwelling, and all such units with communal water systems or other relevant parts that require LRAs.
In order to report that all required LRAs were carried out for a particular dwelling unit, providers must ensure that all statutory obligations in relation to carrying out LRAs relating to this unit were met and were appropriately recorded. This includes statutory obligations for keeping LRAs up-to-date but not the completion of remedial actions that may be identified in LRAs (except for those relating to re-inspection specifically). Although this TSM does not measure remedial actions more generally, providers must of course ensure that these are carried out as required.
LRAs relating to a dwelling unit include all LRAs or re-inspections required both within the dwelling and on any communal or other relevant parts of the property that serve the dwelling. This includes hot and cold water systems which serve dwelling, whether or not such systems are communal, or only serve the dwelling. For example, if an LRA is required on a communal water tank that serves a number of relevant dwelling units, providers must ensure that this LRA is carried out to be able to report that all required LRAs have been carried out for these dwelling units.
If multiple LRAs were required for a dwelling unit (e.g. within the dwelling and on a related communal part), providers must have ensured that all these checks were carried out to report compliance dwelling units must not be double counted in either part A or B of the TSM calculation. The calculation of this TSM must reflect all LRAs that relate to dwelling units owned by the provider, including LRAs for which a third party is responsible. This may include, for example, a communal water tank within a building owned by a third-party landlord, which serves LCRA and/or LCHO units owned by the provider. In these circumstances, a dwelling unit must not be counted within item A of the TSM calculation if the provider was not able to obtain evidence or otherwise make sure that all required LRAs or re-inspections were carried out for the property the dwelling unit is in.
Providers must determine what statutory obligations with respect to LRAs apply to any vacant LCRA or LCHO dwellings and reflect these in the calculation of this TSM. If any vacant LCRA or LCHO dwellings were served by a communal or related parts requiring a LRA, these dwellings must be included in reporting compliance with respect to these communal or related parts.
This TSM must reflect the compliance position at the end of each reporting year. Subject to statutory obligations, it may reflect LRAs conducted within the current reporting year or previous reporting years.

Definition
The percentage of dwelling units for which all required legionella risk assessments (LRAs) have been completed and recorded at the end of the reporting period.
This includes all LCRA and LCHO homes requiring LRAs, including those served by communal water systems. A dwelling is only counted as compliant where all required assessments and re-inspections (within the dwelling and any associated communal systems) have been completed.
Where evidence of completed LRAs (including those carried out by third parties) is not available, the dwelling units should be counted as non-compliant.

Formula
Divided by
B. Number of dwelling units owned for which an LRA was required to have been carried out as at year end.
Multiplied by 100.

Worked Example
The metric would therefore be calculated as:
BS04 = (A * 100)/B
Or in this case:
BS04 = (48 * 100) /50
BS04 = 96%