NWQP Water-Quality Topics

Science Center Objects

From chloride to corrosivity, from pesticides to PAHs, find the most recent National Water Quality Program (NWQP) science on these topics and effects on surface water, groundwater, and ecology.  Informative web pages provide an overview and links to related web pages, publications, maps, news, and data.

eDNA sample collection from Alisal Creek, California

Water quality sample collection during NAWQA California Stream Quality Assessment (Credit: Alan Cressler, USGS)

RELATIONS BETWEEN LAND USE AND WATER QUALITY
     Urban
     Agricultural
 

Macro-invertebrate sampling during SESQA ecological survey

NAWQA team collecting macro-invertebrates during SESQA ecological survey. (Credit: Alan Cressler, USGS)

CONTAMINANTS IN WATER
     Arsenic
     Chloride and salinity
     Emerging contaminants (including pharmaceuticals and hormones)
     Mercury
     Metals
     Nutrients
     Pesticides
     Polycyclic aromatic hydrocarbons (PAHs) and coal-tar sealant
     Radionuclides
     Sediment-associated contaminants
     Volatile organic compounds (VOCs), including MTBE
 

Water Quality sampling of a public water supply well

Groundwater sampling during a NAWQA study looking at the health of the Black Warrior and Chattahoochee Aquifers. (Credit: Alan Cressler, USGS)

DRINKING WATER ISSUES
     Corrosivity
     Domestic (private) supply wells
     Public-supply wells
     Drinking-water taste and odor
     Water-quality benchmarks
     Drinking-water and source-water research
 

RELATIONS TO AQUATIC LIFE
     Stream ecology
     Mercury in stream ecosystems
     Flow alteration
     Harmful algal blooms (HABs)
 

TRENDS IN WATER QUALITY
     Water-quality trends
     Water-quality trends from lake sediment cores
     

 

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►   Confused by some of the water-quality terms?  Find the definitions and explanations you're looking for in the Water-Quality Glossary.