We administer federal and state funds for grants and low-interest loans to improve the quality of Idaho’s water resources. Our drinking water grants and loans assist eligible public drinking water systems with facility planning projects to ensure safe and adequate drinking water supplies. Our wastewater grants and loans help entities build or repair existing wastewater treatment facilities to achieve and maintain compliance with state and federal standards or to provide direct water quality benefits.
Announcement
DEQ is accepting public comments on the draft State Revolving Fund (SRF) Clean Water and Drinking Water- State Fiscal Year 2026 Intended Use Plan (IUP) and draft Legislative Supplemental Funding Implementation Plan from April 25 through May 16, 2025. A virtual informational meeting is scheduled for May 12, 2025, at 11 a.m. MST. Visit DEQ’s Events Page to register for this meeting. More information can be found on DEQ’s Public Comment Opportunities page.
The draft State Revolving Fund (SRF) Clean Water and Drinking Water- State Fiscal Year 2026 Intended Use Plan (IUP) will include the following:
- Draft State Drinking Water and Clean Water State Revolving Fund Intended Use Plan (IUP);
- State Drinking Water Planning Grant Priority List;
- State Wastewater Planning Grant Priority List
The draft Legislative Supplemental Funding Implementation Plan will include the following:
- Draft Legislative Supplemental Funding (LSF) Plan;
- Proposed Criteria;
- LSF Priority List
Funding Opportunities
The Fiscal Year 2027 Letters of Interest (LOIs) are available and must be submitted by January 9, 2026.
A virtual training about LOI updates will be held on November 4, 2025, from 2:00 – 3:00 p.m. (MST). Register here.
LOI Forms
- FY27 Drinking Water Planning Grant LOI Form
- FY27 Wastewater Planning Grant LOI Form
- FY27 Drinking Water State Revolving Fund LOI Form
- FY27 Clean Water State Revolving Fund LOI Form
- FY27 Drinking Water Lead Service Line LOI Form
- FY27 Drinking Water Emerging Contaminants LOI Form
- FY27 Clean Water Emerging Contaminants LOI Form
- FY27 Sewer Overflow and Stormwater Planning Grant LOI Form
Questions regarding funding can be sent to grants.loans@deq.idaho.gov.
Funding Assistance at a Glance
Learn about the FY2023 American Rescue Plan Act and FY2024 Leading Idaho priority lists. Updated August 25, 2025.
- ARPA Infrastructure Projects
- Leading Idaho Infrastructure Projects
- ARPA Planning Grants
- Leading Idaho Planning Grants
- Idaho DEQ ARPA Water Infrastructure Grants Interactive Map
- 2025 Water Infrastructure Progress Legislative Report | (Graphics)
Click on the maps below to learn about drinking water and wastewater funding by county for 2000-2024.
