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.
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 November 17, 2025.
