EPA Region 10 Drinking Water Unit (DWU) | Region 10 | US EPA

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Drinking Water in the Pacific Northwest and Alaska

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New and improved GIS maps are now available online for the 14 EPA-designated sole source aquifers in Idaho, Washington and Oregon. The new maps outline the borders of the aquifer area, the source area and they contain road names. Project managers can find their project locations on the map and know whether or not they need EPA Sole Source Aquifer Program review and approval. (Review and approval is necessary if the project is located within an aquifer or source area AND is receiving federal funding.)

Drinking Water Program

Contacts and Mission
Contacts Listed by Name
Contacts Listed by Subject
Mission Statement

Compliance and Enforcement
Compliance Data Management
Consumer Confidence Reports
Initial Distribution System Evaluation (IDSE) Reporting
Microbial and Disinfection Byproducts Rules
National Drinking Water Standards (MCLs and MCLGs)
Small System Compliance Technology List for the Surface Water Treatment Rule (PDF) (48pp, 129 K)

Drinking Water Information & Links
Drinking Water in Washington State
Drinking Water Links
Initial Distribution System Evaluation (IDSE) Reporting
Water Where you Live
Frequently Asked Questions

Grants & Funding
Drinking Water State Revolving Fund (DWSRF)
Region 10 Annual Drinking Water State Revolving Fund Report (PDF) (July 2007) (30 pp. 1.2MB)
Tribal/Indian Infrastructure Grants Programs (Drinking Water/Wastewater)

Managing & Operating Drinking Water Systems
Source Water Protection Program
Sole Source Aquifer Program
Public Water System (PWS) Compliance Program
Capacity Development for Small Systems
Operator Certification

Tribal Drinking Water Systems
Tribal Drinking Water Program
Direct Implementation on Tribal Lands
National Tribal Compliance Assistance Center
Emergency Response Planning Guide for Tribal Water Systems (MS Word) (65pp, 652K)
Security Vulnerability Self-Assessment Guide for Tribal Drinking Water Systems (MS Word) (27pp, 598K)

Local Navigation

URL: https://yosemite.epa.gov/R10/WATER.NSF/Drinking+Water/About+DWU

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