IllinoisSB4004104th General Assembly (2025–2026)Senate

AQUIFER PROTECTION ACT

Sponsored By: Chapin Rose (Republican)

In Committee

Summary

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.

assignmentsexecutive

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Bill Overview

No Economic Impacts Identified for this Bill

Sponsors & Cosponsors

Sponsor

  • Chapin Rose

    Republican • Senate

Cosponsors

  • Chris Balkema

    Republican • Senate

  • Darby A. Hills

    Republican • Senate

  • Erica Harriss

    Republican • Senate

  • Paul Jacobs

    Republican • Senate

  • Sally J. Turner

    Republican • Senate

  • Sue Rezin

    Republican • Senate

  • Terri Bryant

    Republican • Senate

Roll Call Votes

No roll call votes available for this bill.

Actions Timeline

  1. Added as Co-Sponsor Sen. Paul Jacobs

    9/2/2026Senate
  2. Added as Co-Sponsor Sen. Erica Harriss

    6/17/2026Senate
  3. Added as Co-Sponsor Sen. Sue Rezin

    5/30/2026Senate
  4. Added as Co-Sponsor Sen. Darby A. Hills

    5/30/2026Senate
  5. Added as Co-Sponsor Sen. Terri Bryant

    5/29/2026Senate
  6. Added as Chief Co-Sponsor Sen. Sally J. Turner

    5/29/2026Senate
  7. Added as Co-Sponsor Sen. Chris Balkema

    5/28/2026Senate
  8. Senate Committee Amendment No. 1 Rule 3-9(a) / Re-referred to Assignments

    5/22/2026Senate
  9. Rule 3-9(a) / Re-referred to Assignments

    5/22/2026Senate
  10. Rule 2-10 Committee/3rd Reading Deadline Established As May 22, 2026

    5/15/2026Senate
  11. Senate Committee Amendment No. 1 To AI and Social Media

    5/6/2026Senate
  12. Senate Committee Amendment No. 1 Assignments Refers to Executive

    5/6/2026Senate
  13. Senate Committee Amendment No. 1 Referred to Assignments

    5/5/2026Senate
  14. Senate Committee Amendment No. 1 Filed with Secretary by Sen. Chapin Rose

    5/5/2026Senate
  15. Rule 2-10 Committee/3rd Reading Deadline Established As May 15, 2026

    4/24/2026Senate
  16. Rule 2-10 Committee Deadline Established As April 24, 2026

    3/27/2026Senate
  17. Rule 2-10 Committee Deadline Established As March 27, 2026

    3/13/2026Senate
  18. To AI and Social Media

    2/25/2026Senate
  19. Assigned to Executive

    2/24/2026Senate
  20. Referred to Assignments

    2/6/2026Senate
  21. First Reading

    2/6/2026Senate
  22. Filed with Secretary by Sen. Chapin Rose

    2/6/2026Senate

Bill Text

  • Introduced

  • Senate Amendment 1

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