HSG179 — Pool Slip Resistance Requirements

What HSG179 is

HSG179 is published by the HSE as approved guidance for UK pool operators. It is not a regulation in the strict sense, but courts and tribunals take HSG179 as the principal benchmark for what reasonable practice looks like in pool risk management. A pool operator whose practice substantially aligns with HSG179 has strong defence against claims; an operator whose practice diverges from HSG179 without good reason carries elevated exposure.

HSG179 covers a broad range of pool operational topics: water quality, plant safety, lifeguarding, pool design, emergency procedures, and slip/trip risk on poolside.

Slip and trip elements of HSG179

HSG179 addresses pool surround slip resistance through its broader risk assessment framework. The relevant requirements include:

• Identification of slip and trip hazards on poolside, including surround tile, steps, ladders, ramps, and changing-room/wet-corridor transitions
• Assessment of risk severity and likelihood for each hazard
• Implementation of control measures — surface specification at procurement, signage, supervision regimes, cleaning protocols, surface maintenance
• Periodic review of those control measures as conditions change
• Record-keeping suitable for inspection by enforcement bodies and use in any subsequent claim defence

Where pendulum testing fits into HSG179

HSG179 does not specify pendulum thresholds, but it does require that slip risk is assessed and managed. UKAS-accredited pendulum and surface roughness data is the most defensible documentary evidence available for the assessment-of-risk and verification-of-control-measure elements. It feeds directly into the framework HSG179 sets out.

An HSG179-aligned pool risk assessment supported by UKAS pendulum data is materially stronger than the same risk assessment supported by visual inspection alone.

Operator responsibilities under HSG179

The pool operator is the duty holder for HSG179 purposes. For pools operated by a leisure trust or contractor on behalf of a local authority, the operator and the authority share the duty in a way that depends on the operating contract. For brand-managed franchised pools (some hotel and holiday park settings), the franchisor and franchisee may share elements of the duty.

In all cases, the duty includes commissioning periodic risk assessment of poolside slip-trip hazards, taking action on findings, and retaining records. UKAS-accredited periodic testing is the standard evidence pathway for the slip-trip element.

PWTAG complementary guidance

The Pool Water Treatment Advisory Group (PWTAG) provides additional UK pool industry guidance, particularly on water treatment and pool plant operation. While PWTAG focuses on chemistry and microbiology rather than slip resistance, its guidance interacts with slip risk because plant chemistry affects surround surfaces over time. Where operators reference PWTAG protocols in their pool plant SOPs, slip testing programmes can be structured to align with those review cycles.

HSE inspection — what they look for

Where a pool is HSE-inspected (typically following a serious incident), the inspector will look for evidence that:

• Slip and trip risk assessment has been carried out
• The assessment has been reviewed periodically
• Control measures identified in the assessment have been implemented
• The implementation of control measures has been verified
• Records of all of the above are retained and can be produced on request

UKAS-accredited periodic pendulum and Rz testing produces documentary evidence directly addressing each of these inspector concerns.