Illinois General Assembly - Full Text of SB4041

Sen. Laura M. Murphy

Filed: 5/5/2026

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AMENDMENT TO SENATE BILL 4041

AMENDMENT NO. ______. Amend Senate Bill 4041 by replacing everything after the enacting clause with the following:

"Section 5. The Permanent Noise Monitoring Act is amended by adding Section 16 as follows:

(620 ILCS 35/16 new)

Sec. 16. Noise contour studies.

(a) As used in this Section:

"Airport sponsor" means the entity that owns or operates a covered airport.

"Covered airport" means an airport, as defined in Section 6 of the Illinois Aeronautics Act, that is a commercial service airport and that had more than 150,000 aircraft operations, take-offs and landings, during the immediately preceding calendar year.

"Noise contour study" means a noise exposure map and accompanying documentation prepared in accordance with 14 CFR Part 150 for existing conditions and forecast conditions.

(b) Beginning no later than December 31, 2030 and every 5 years thereafter, the airport sponsor shall prepare or cause to be prepared a noise contour study for each covered airport under its jurisdiction.

(c) Each noise contour study required under this Section shall:

(1) be prepared using the methodology required under 14 CFR Part 150;

(2) include contours for existing conditions and forecast conditions;

(3) identify the location and extent of noncompatible land uses within the contours to the extent required under 14 CFR Part 150;

(4) include a summary of changes, if any, from the most recently completed noise contour study; and

(5) include a modernization review evaluating whether additional analysis should be included in future studies, including, but not limited to:

(A) the use of supplemental noise contours, including contours below DNL 65 dB;

(B) changes in federal guidance, methodology, or modeling tools;

(C) changes in aircraft operations, fleet mix, runway usage, nighttime operations, or surrounding land uses; and

(D) whether additional metrics, thresholds, or disclosure practices should be used for informational or planning purposes in addition to those required under 14 CFR Part 150.

(d) The modernization review required under paragraph (5) of subsection (c) shall include findings and recommendations concerning whether any revisions to applicable noise thresholds, contours, methodologies, or disclosure practices should be considered by the airport sponsor, the State, or the Federal Aviation Administration.

(e) The airport sponsor shall make each completed noise contour study available to the public on its website and shall submit a copy to the Governor, the President of the Senate, the Senate Minority Leader, the Speaker of the House of Representatives, and the Minority Leader of the House of Representatives.

(f) Nothing in this Section prohibits the airport sponsor from preparing a revised or supplemental noise contour study at any time more frequently than required under this Section.".