Illinois legislation · 104th General Assembly
Illinois SB4004: AQUIFER PROTECTION ACT
Status: In committee, September 2, 2026
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.
What the bill says
A bill FOR 104TH GENERAL ASSEMBLY State of Illinois 2025 and 2026SB4004Introduced 2/6/2026, by Sen. Chapin RoseSYNOPSIS AS INTRODUCED: New Act New Act New Act Creates the Data Center Water Transparency and Aquifer ProtectionAct. Provides that, beginning January 1, 2027, no data center operatingwithin the State shall use water from the Mahomet Aquifer. Prohibits Stateagencies from issuing or renewing a permit authorizing a data center towithdraw groundwater from the Mahomet Aquifer…
From the introduced text, February 6, 2026:
A BILL FOR 104TH GENERAL ASSEMBLY State of Illinois 2025 and 2026SB4004Introduced 2/6/2026, by Sen. Chapin RoseSYNOPSIS AS INTRODUCED: New Act New Act New Act Creates the Data Center Water Transparency and Aquifer ProtectionAct. Provides that, beginning January 1, 2027, no data center operatingwithin the State shall use water from the Mahomet Aquifer. Prohibits Stateagencies from issuing or renewing a permit authorizing a data center towithdraw groundwater from the Mahomet Aquifer. Requires existing datacenters to transition to alternative water sources and cease allgroundwater withdrawals from the Mahomet Aquifer by no later than January1, 2028. Provides that a unit of local government may not enter into,enforce, or renew any nondisclosure agreement, confidentiality clause, orsimilar contractual provision with a data center that restricts thedisclosure of information related to the data center's water use. Containsprovisions concerning data confidentiality and public access. Establishespenalties for violations. Grants the Illinois Environmental ProtectionAgency rulemaking powers. LRB104 20379 JDS 33836 b LRB104 20379 JDS 33836 b LRB104 20379 JDS 33836 b A BILL FOR SB4004LRB104 20379 JDS 33836 b SB4004 LRB104 20379 JDS 33836 b SB4004 LRB104 20379 JDS 33836 b AN ACT concerning safety. Be it enacted by the People of the State of Illinois, represented in the General Assembly: Section 1.Short title.This Act may be cited as theData Center Water Transparency and Aquifer Protection Act. Section …
Sponsors
- Chapin Rose (R, 51) · primary sponsor
- Sally J. Turner (R, 44)
- Chris Balkema (R, 53)
- Terri Bryant (R, 58)
- Darby A. Hills (R, 26)
- Sue Rezin (R, 38)
- Paul Jacobs (R, 118)
- Erica Harriss (R, 56)
Latest actions
- : Added as Co-Sponsor Sen. Paul Jacobs
- : Added as Co-Sponsor Sen. Erica Harriss
- : Added as Co-Sponsor Sen. Sue Rezin
- : Added as Co-Sponsor Sen. Darby A. Hills
- : Added as Co-Sponsor Sen. Terri Bryant
- : Added as Chief Co-Sponsor Sen. Sally J. Turner
- : Added as Co-Sponsor Sen. Chris Balkema
- : Senate Committee Amendment No. 1 Rule 3-9(a) / Re-referred to Assignments
- : Rule 3-9(a) / Re-referred to Assignments
- : Rule 2-10 Committee/3rd Reading Deadline Established As May 22, 2026
Subjects: New Act
Common questions
- What is SB4004?
- SB4004 is a bill in the Illinois Legislature (104th General Assembly): AQUIFER PROTECTION ACT.
- What does SB4004 do?
- In its own words: A bill FOR 104TH GENERAL ASSEMBLY State of Illinois 2025 and 2026SB4004Introduced 2/6/2026, by Sen. Chapin RoseSYNOPSIS AS INTRODUCED: New Act New Act New Act Creates the Data Center Water Transparency and Aquifer ProtectionAct. Provides that, beginning January 1, 2027, no data center operatingwithin the State shall use water from the Mahomet Aquifer. Prohibits Stateagencies from issuing or renewing a permit authorizing a data center towithdraw groundwater from the Mahomet Aquifer…
- What is the status of SB4004?
- In committee as of September 2, 2026. Latest action: Added as Co-Sponsor Sen. Paul Jacobs (September 2, 2026).
- Who sponsored SB4004?
- Chapin Rose (R, 51), with 7 co-sponsors.
- Where is the official record for SB4004?
- On the Illinois Legislature website: https://www.ilga.gov/Legislation/BillStatus?DocNum=4004&GAID=18&DocTypeID=SB&SessionID=114
Source: official Illinois record. Tracked by Delilah, AI for legislation across all 50 states and Congress.