USGS scientists deploy SPMD and POCIS samplers to collect waterborne contaminants in Manoa Stream on Oahu, Hawaii.

Noteworthy

Press Releases

• USGS Assessment of Brackish Water Could Help Nation Stretch Limited Freshwater Supplies
• First-of-its-kind Interactive Map Brings Together 40 Years of Water-Quality Data
• 20 Years Researching Harmful Algal Blooms Supports Sustainable Water Supply in Wichita
• The Quality of the Nation's Groundwater: Progress on a National Survey (1/19/2017)

Featured Science:

• Spatial variability of harmful algal blooms in Milford Lake, Kansas, July and August 2015
• Why Monitor Water Quality? [1.7MB PDF]

Past featured science...

Water Quality Data

Today's Water Conditions

Get continuous real-time water-quality measurements from Water-Quality Watch maps.

Water Quality Portal (WQP)

Get current and historical USGS and EPA water-quality data at the WQP.

BioData

Get stream ecosystem aquatic bioassessment data from BioData.

For More Data

View a complete list of USGS water-quality data resources.

USGS in Your Area

USGS Water Science Centers are located in each state.

USGS Water Science Center Quality Assurance Plans for Water-Quality Activities

The template for developing USGS Water Science Center quality assurance (QA) plans for water-quality activities has been revised and is available for Water Science Centers to customize. The template is intended to provide a nearly complete QA plan based on Water Mission Area policies and memorandums and must be customized by each Water Science Center as described in the preface of the template. The template is available as a Word file below; an "Updates/Errata" page lists changes made to the template.

• USGS Water Science Center Quality Assurance Plans for Water-Quality Activities Template, revised April 2014 [280KB DOCX]
• Updates and Errata for Water-Quality Activities Template [20KB DOCX]

Superseded Version

The previous version of the template and "Updates/Errata" page are available [110KB ZIP].