Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our Next Generation Station Page here.
Click to hideNews Bulletins

Water Quality Samples for USA
Grouped by County

! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024
with a full decommission expected 6 months later. Learn more about the upcoming change and where to find the new samples data in our blog.
Some complex retrievals may take a few minutes.

Site Selection Results -- 4 sites found


Hydrologic unit = 18010212
Minimum number of samples = 1

Save file of selected sites to local disk for future upload

Data for individual sites can be obtained by selecting the site number below

  group icon Trinity County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 11528400 HAYFORK C NR HAYFORK CA 1977-08-09 1977-08-09 1
USGS 11528500 HAYFORK C NR HYAMPOM CA 1977-08-09 1977-08-09 1
USGS 11528700 SF TRINITY R BL HYAMPOM CA 1966-12-03 1982-05-05 84
USGS 11529000 SF TRINITY R NR SALYER CA 1957-02-24 2015-08-26 264