California pool signage requirements apply to every public swimming pool in the state and cover capacity, lifeguard status, emergency contacts, CPR instructions, gate warnings, depth, diving, spa cautions, and illness prevention. Each required sign has a specific text and minimum letter height set by Chapter 31B of the California Building Code, and each must be permanently mounted where pool users can see it.1UpCodes. California Building Code – Chapter 31B Public Pools
Which Pools Have to Post These Signs
California defines a public swimming pool broadly. It includes any pool open to the general public whether free or paid, any pool available to members of an organization and their guests, pools in multi-unit apartment buildings or residential developments, and pools at hotels, athletic clubs, or schools.2California Legislative Information. California Code Health and Safety Code – 116064.2 Spas, hot tubs, and non-portable wading pools fall under the same definition.
A backyard pool at a single-family home used only by the homeowner’s family is not a public pool under these rules. Once a pool serves tenants, guests, or members, the signage requirements apply.
Baseline Standards for Every Sign
Unless the code specifies otherwise for a particular sign, letters and numbers must be at least four inches high and clearly legible. Every sign must be permanently attached to a wall, pole, gate, or similar structure and positioned so all pool users can see it.3UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3120B.1 General Paper printouts or signs propped on a chair will not pass inspection. Materials need to hold up to sun, chlorine, and water.
Pool Capacity Sign
A sign must display the maximum number of users allowed in the pool at one time. The number comes from water surface area: one bather for every 20 square feet of pool water surface, and one bather for every 10 square feet of spa water surface.4UpCodes. California Building Code – Chapter 31B Public Pools A 1,000-square-foot pool works out to a maximum of 50. Local health inspectors check that the posted number matches the actual pool dimensions.
No Lifeguard Sign
When no lifeguard is on duty, a sign must read “NO LIFEGUARD ON DUTY” in letters at least four inches high. Below that, in letters at least one inch high, the sign must warn that children under 14 should not use the pool without a parent or adult guardian present.5UpCodes. California Code 3120B.4 – No Lifeguard Sign This is the sign operators are cited on most often, usually for text that is too small or has faded past legibility.
Emergency Number and CPR Signs
Two separate postings cover emergencies. An emergency sign must display “911” in numerals at least four inches high. The same sign must include the phone number of the nearest emergency services, such as the local fire department, and the name and street address of the pool facility, all in characters at least one inch high.6UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3120B.6 Emergency Sign The facility address is on the sign so anyone calling 911 can read it to the dispatcher.
Separately, the pool enclosure must display an illustrated diagram of artificial respiration and CPR procedures with text at least one-quarter inch high, mounted where users can easily see and refer to it.7UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3120B.5 Artificial Respiration and Cardiopulmonary Resuscitation Sign Pre-printed, code-compliant CPR posters are widely available from safety supply companies.
Gate, Door, and After-Dark Signs
Every gate and door leading into the pool enclosure needs a sign on the exterior side reading either “KEEP GATE CLOSED” or “KEEP DOOR CLOSED.”8UpCodes. California Code 3120B.10 – Keep Closed The sign faces people approaching the pool area, not swimmers inside it.
Pools built without the lighting required under current code need a separate sign posted outside each entrance gate reading “NO USE OF POOL ALLOWED AFTER DARK.”9UpCodes. California Code 3120B.9 – No Use After Dark The same sign has to go up temporarily whenever underwater or deck lighting breaks down, until the operator repairs it.
Depth Markers and No Diving
Numerical depth markers must be installed around the pool perimeter at intervals no greater than 25 feet, with additional markers at the points of maximum and minimum depth, at each end, on both sides of the shallowest and deepest areas, and at every break in the pool’s slope. Markers go on the deck or coping within a few feet of the water’s edge and must reflect the actual water depth. Spas and wading pools follow a simpler standard requiring at least two depth markers.
Any pool with a maximum water depth of six feet or less must post “NO DIVING” signs in conspicuous locations easily visible to swimmers.10UpCodes. California Building Code – No Diving Sign Many facilities also install the universal no-diving symbol on the deck near shallow-water depth markers, though the code’s primary requirement is the text posting.
Spa and Hot Tub Caution Sign
Spas and hot tubs need a dedicated warning sign headed “CAUTION” in four-inch letters. Below that, in letters at least one inch high, the sign must include all five of the following warnings:
- Elderly persons, pregnant women, infants, and anyone with a health condition requiring medical care should consult a physician before entering the spa.
- Children should not use the spa without adult supervision.
- Using a spa while under the influence of alcohol, narcotics, drugs, or medication may lead to serious consequences.
- Do not use the spa alone.
- Extended exposure may cause hyperthermia, nausea, dizziness, or fainting.
All five lines are mandatory. A sign missing even one can draw a correction notice. A separate sign reading “EMERGENCY SHUT OFF SWITCH” in letters at least one inch high must be posted directly next to the spa’s emergency shutoff switch.11UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3120B.8
Diarrhea and Illness Entry Notice
A sign at the pool entrance must notify users that anyone with active diarrhea, or who has had active diarrhea within the previous 14 days, is not allowed in the pool water. The notice can use text in letters at least one inch high, a diagram, or both.12California Department of Public Health. Initial Statement of Reasons – Public Pools
What Happens If Signage Is Missing or Wrong
Local health departments, typically the county environmental health division, enforce these requirements through inspections. No public pool can open to users without written approval from the local enforcing agent, and inspections happen both at initial construction and on an ongoing basis.13UpCodes. California Building Code – Chapter 31B Public Pools – Section: 3105B When an inspector finds missing or non-compliant signage, the operator receives a correction notice with a deadline. Repeated violations or failure to correct can lead the enforcing agent to order the pool closed until it comes into compliance.