Illinois Statewide Rule

Illinois Swimming Pool Barrier Code Applies Statewide

Heavy RestrictionsApplies statewide across Illinois (2026)

Key Facts

Statute: 210 ILCS 125
Rules: 77 Ill. Adm. Code 820
Public pool barrier: At least 4 feet
Gate: Self-closing, self-latching
Residential pools: Local codes (IRC 48 inches)

Last verified: September 5, 2026Source: Illinois General Assembly

Summary

Illinois requires public and semi-public pools to be enclosed by barriers at least 4 feet high under the state Swimming Facility Code, while residential pool fencing is enforced through locally adopted building codes.

a) Enclosures 1) The swimming pool area shall be completely enclosed by a protective wall, fence or other barrier, at least 4 feet high, measured on the inside and outside, and not providing ready footing for climbing. The height of an opening under the bottom of the barrier shall not exceed 4 inches. The openings in any barrier shall not exceed 4 inches in width and height.

Source: Illinois General AssemblyView official code

Full Breakdown

The Illinois Swimming Pool and Bathing Beach Act (210 ILCS 125) and Department of Public Health rules at 77 Ill. Adm. Code 820 require public and semi-public pools to be completely enclosed by a barrier at least 4 feet high with self-closing, self-latching gates, openings no larger than 4 inches, and lockable entrances. The Act does not reach backyard pools serving a single residence; residential barriers come from each municipality's adopted building code, typically the International Residential Code's 48-inch standard. A proposed statewide 42-inch residential rule (Zoe's Law) has not been enacted. Counties and municipalities regulate residential pools under 55 ILCS 5/5-1066 and 65 ILCS 5/11-30-9.

Violations & Penalties

Operating a public or semi-public pool without a compliant barrier can bring IDPH enforcement, closure orders, and misdemeanor penalties under 210 ILCS 125; residential violations are cited under local building codes.

Frequently Asked Questions

Does Illinois require a fence around residential pools?

Not by statewide statute. Residential barriers are required by local building codes, which typically adopt the International Residential Code's 48-inch standard; check your municipality before installing a pool.

Can my city skip the state pool barrier rules?

No for public and semi-public pools: the IDPH 4-foot enclosure rules are a statewide minimum. For backyard pools, your city sets the standard through its own building code.

Sources

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