ADEQ monitors the ambient water quality in streams, lakes and groundwater throughout the state. Information obtained from ambient monitoring is used to develop water quality standards and to inform the public about Arizona's water quality. Water quantity issues are handled by the Department of Water Resources.

Ambient River and Stream Monitoring

• Water Monitoring Regions
• Bioassessment
• Physical Integrity
• Reports
• USGS Cooperative Monitoring

Ambient Lake Monitoring

• Monitoring Activities
• National Lake Survey
• Other Lake Related Sites

Ambient Groundwater Monitoring

• Overview
• Studies