Illinois treats public spas and hot tubs as regulated swimming facilities, applying statewide water quality, signage, and bather load standards through IDPH.
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.
Permit suspension; daily fines; immediate closure for inadequate disinfection.
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