Rulemaking initiated to align with federal national primary drinking water standards.
Status of Rulemaking
Overview
The goal of the rulemaking is to update Idaho’s Groundwater Quality Rule to align with the federal national primary drinking water standards, where appropriate, resulting in consistent standards protective of human health. The intent is to address Table II – Primary Constituent Standards, found in Section 200, which will include arsenic, lead, uranium, and certain perfluoroalkyl substances.
Additionally, the rulemaking will consider establishing new groundwater standards and whether existing implementation provisions, including aquifer categorization procedures, should be clarified or streamlined.
Meeting Details
Method for Participating and Submitting Comments
Those interested in participating in the negotiated rulemaking process are encouraged to attend the scheduled meeting.
For those who cannot participate by attending the meeting, public comment opportunities will be made available throughout the rulemaking process.
Submit all written comments and direct questions to:
Diane Cutler
Department of Environmental Quality
1410 N. Hilton, Boise, ID 83706
Diane.Cutler@deq.idaho.gov
Proposed Rule
Information pending.
Negotiated Rule Documents and Meeting Presentations
| Negotiated Rule Documents and Meeting Presentations | Date of Meeting | Written Comment Deadline |
|---|---|---|
| Mtg 2 Presentation | 06/11/2026 | NA |
Negotiated Rule Draft No. 2 | 06/11/2026 | 06/18/2026 |
| Mtg 1 Presentation | 05/13/2026 | NA |
| Negotiated Rule Draft No. 1 | 05/13/2026 | 05/20/2026 |
Public Comment
| Comment | Submitted by | Date Received |
|---|---|---|
| Negotiated Rule Draft 2 | Idaho Mining Association | 06/22/26 |
| Negotiated Rule Draft 2 | Perpetua | 06/22/26 |
| Negotiated Rule Draft 2 | IACI | 06/16/26 |
| Negotiated Rule Draft 2 | F. Hall & J. Howard Supplemental Info | 06/10/26 |
| Negotiated Rule Draft 2 | F. Hall & J. Howard | 06/10/26 |
| Negotiated Rule Draft 2 | City of Meridian | 06/08/26 |
| Negotiated Rule Draft 1 | DEQ Response to Comments | NA |
| Negotiated Rule Draft 1 | Idaho Rural Water Association | 05/19/26 |
Legislative Rule Review
Information pending.
Meeting of the Idaho Board of Environmental Quality
Information pending.
Rulemaking Documents Required by Idaho Administrative Procedures Act
Additional Information
Information pending.
Reference Documents
Information pending.