The NAWQA Project is the largest component of the NWQP as a primary source of objective and nationally consistent water-quality data and information on the quality of the Nation’s streams and groundwater.
Water-Quality Quicklinks
Water-Quality Quicklinks
- WaterWatch: Real-Time USGS Water-Quality Data
- Water Quality Portal: Data From Hundreds of Agencies
- Sediment Data Portal
- Pesticide Use Maps and Data
- Health-Based Screening Levels for Drinking and Source Water
- BioData: Aquatic Bioassessment Data for the Nation
- National Water-Quality Project Sampling Methods