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You are here: Home / Programs / Environmental Quality Programs / Tribal Water Systems / TWS Links & Resources

EPA Groundwater and Drinking Water, Tribal Programs—Drinking Water

EPA Enforcement & Compliance History Online (ECHO)

EPA American Indian Environmental Office Tribal Portal

EPA Groundwater and Drinking Water

Association of Boards of Certification

Phoenix Area Indian Health Service

WaterOperator.org

American Water Works Association

Water Environment Federation

Sacramento State Office of Water Programs

Arizona Water Association

National Rural Water Association

Rural Water Association of Arizona

Water Reuse Association

Water Resources Research Center

Arizona Rural Water Infrastructure Committee

Arizona Hydrological Society

Workplace Safety Specialists

National Groundwater Association

Tribal Water Systems

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News

2025 TWS Training Schedule

Nomination Request for the 2025 Operator of the Year

Technical Assistance to Tribal Communities

Featured Trainings & Events

2025 TWS Training Schedule

2025 Computer-Based Testing (Year-Round)

Wastewater Treatment-Level 1 Operator Certification Training Course, in Mesa, Arizona, June 16-27, 2025, (Event ID #25012-blended)

Water Treatment-Levels 2 & 3 Operator Certification Training Course, in Pinetop, Arizona, July 7-18, 2025, (Event ID #25017-blended)

Math for Drinking Water Operators Live On-line Training Course, July 8-17, 2025, (Event ID #25021), Region 9 Priority Registration

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