Illinois Hot Tub Rules Law: Statewide Swimming Pools & Spas Rules (2026)

Key Facts

Max temperature: 104 degrees Fahrenheit
pH range: 7.2 to 7.8
Drain covers: Anti-entrapment required
Warning signs: Posted at entry

Full Breakdown

Under the Swimming Pool and Bathing Beach Act (210 ILCS 125) and 77 Ill. Adm. Code 820, public spas and hot tubs are regulated as swimming facilities. Operators must maintain disinfectant residual, pH between 7.2 and 7.8, and temperature not exceeding 104 degrees Fahrenheit. Required signage includes warnings for pregnant women, children under five, and persons with cardiovascular conditions. Maximum bather time of 15 minutes is recommended on signage. Anti-entrapment drain covers are mandatory. Private residential hot tubs fall under local building codes, not the state Act.

Violations & Penalties

Permit suspension; daily fines; immediate closure for inadequate disinfection.

Frequently Asked Questions

What temperature limits apply to Illinois public hot tubs?

Maximum 104 degrees Fahrenheit under state public health rules. Operators must monitor and log temperatures, and post warnings for vulnerable bathers near the spa.

Are home hot tubs regulated by Illinois state law?

No. The Swimming Pool Act covers public and semi-public spas. Private residential hot tubs are regulated by local building, electrical, and plumbing codes only.

Illinois Public Spa and Hot Tub Sanitation Standards

Key Facts

Full Breakdown

Violations & Penalties

Frequently Asked Questions

Sources

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