S.B. 4004: AQUIFER PROTECTION ACT
Illinois, 104th General Assembly. In committee, May 22, 2026.
Last verified
S.B. 4004 at a glance
Status In committee In committee, .
No official summary is on file yet. The full text is on the legislature's page, linked below.
Creates the Data Center Water Transparency and Aquifer Protection Act. Provides that, beginning January 1, 2027, no data center operating within the State shall use water from the Mahomet Aquifer. Prohibits State agencies from issuing or renewing a permit authorizing a data center to withdraw groundwater from the Mahomet Aquifer. Requires existing data centers to transition to alternative water sources and cease all groundwater withdrawals from the Mahomet Aquifer by no later than January 1, 2028. Provides that a unit of local government may not enter into, enforce, or renew any nondisclosure agreement, confidentiality clause, or similar contractual provision with a data center that restricts the disclosure of information related to the data center's water use. Contains provisions concerning data confidentiality and public access. Establishes penalties for violations. Grants the Illinois Environmental Protection Agency rulemaking powers.
Measure Bill.
Sponsors Chapin Rose (R); Sally Turner (R); Chris Balkema (R); Terri Bryant (R); Darby Hills (R); Susan Rezin (R); Erica Harriss (R)
Subjects None on file. The legislature's own list.
Official page www.ilga.gov/Legislation/BillStatus?DocNum=4004&GAID=18&DocTypeID=SB&LegId=167531&SessionID=114. Found through LegiScan (bill 2111407), whose data is CC BY 4.0; the citation is the legislature's own page.
What happened, and when
- May 22, 2026 In committee
S.B. 4004 went to committee in the Senate. ilga.gov primary source [1] The official action text: Rule 3-9(a) / Re-referred to Assignments.
- February 24, 2026 Sent to the executive
S.B. 4004 was sent to the governor. ilga.gov primary source [1] The official action text: Assigned to Executive.
- February 6, 2026 In committee
S.B. 4004 went to committee in the Senate. ilga.gov primary source [1] The official action text: Filed with Secretary by Sen. Chapin Rose.
- February 6, 2026 Introduced
S.B. 4004 was introduced in the Senate. ilga.gov primary source [1] The official action text: Filed with Secretary by Sen. Chapin Rose.
Newest first. A stage is never overwritten; each entry carries the source it rests on. The status at the top is derived from the newest entry. The action text in Researcher mode is the legislature's own wording.
Sources
Bill data from LegiScan, licensed CC BY 4.0. The record chooses the bills, writes each stage in its own words and cites the legislature's own page for every bill. Bills on this record are also found through the legislatures' own records; the citation is always the legislature's own page or the clerk's own file. This bill was found through LegiScan.
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Cite this page
Data Center Record, "S.B. 4004: AQUIFER PROTECTION ACT", https://datacenterrecord.org/bills/il-2025-sb-4004. Data: Data Center Record, datacenterrecord.org, CC BY 4.0.
The structured rows are CC BY 4.0. Link to this page; that is what turns a reuse into a citation. Prose stays under copyright.
