Water quality sampling on San Francisco Bay

Water quality sampling using a Niskin sampler from the Research Vessel Polaris at sunset on San Francisco Bay.

Detailed Description

USGS conducts water quality sampling to describe changes in water quality along the deep channel of the San Francisco Bay-Delta system. Sampling includes continuious sampling and discrete sampling. Here a water discrete water sample is collected using a Niskin sampler at sunset in north San Francisco Bay.


Image Dimensions: 3504 x 2336

Date Taken:

Location Taken: CA, US


Water Quality Sampling of San Francisco Bay
For almost four decades the U.S. Geological Survey has maintained a program of research and observation in San Francisco Bay. The program includes regular measurements of water quality along a 145 kilometer transect spanning the length of the entire estuarine system. This website describes the measurement program, displays results of water quality measurements, and makes the full data set available to all interested users.