National Water Quality Program
NAWQA Surface Water Programs
RSQA, SPARROW, Water Quality in Rivers and Streams
NAWQA Groundwater Programs
Groundwater Quality trends
NAWQA Quick Links
Direct links to NAWQA programs, projects, and applications
Topical index to NAWQA science
Science Center Objects
Sustaining the quality of the Nation's water resources and the health of our diverse ecosystems depends on the availability of sound water-resources data and information to develop effective, science-based policies. In 1991, Congress established the National Water-Quality Assessment (NAWQA) to address where, when, why, and how the Nation's water quality has changed, or is likely to change in the future, in response to human activities and natural factors. Since then, NAWQA has been a leading source of scientific data and knowledge used by national, regional, state, and local agencies to develop science-based policies and management strategies to improve and protect water resources used for drinking water, recreation, irrigation, energy development, and ecosystem needs.
NAWQA Water Quality Topics
Surface Water and Ecology
Water Quality in Rivers and Streams: Current Conditons and Long-Term Trends
Monitors current conditions and long-term trends in water chemistry and aquatic ecology in the Nation’s streams and rivers.
Modeling Contaminant Loads in Rivers and Streams (SPARROW)
SPARROW models the relations between human activities, natural processes, and contaminant transport by linking monitoring data with information on watershed characteristics and contaminant sources.
► SPARROW Models
Groundwater Quality: Current Conditions and Long-Term Trends
Groundwater Quality: Predictions for Unmonitored Areas