California Real-time Water Quality
Real-time computed concentrations of water-quality constituents such as suspended sediment,
total nitrogen, and total phosphorus are calculated using ordinary least squares regression models.
The results of these models, along with direct water-quality measurements, can be viewed here
as time-series graphs, or downloaded as tabular data.
Ordinary least squares regression models on this site use conventional sensor measurements
(for example, discharge, temperature, pH, specific conductance, turbidity,
and dissolved oxygen) to compute concentrations and loads of other water-quality constituents
in real time. This makes it possible to compute instantaneous values of many constituents in
real time for public safety without the lengthy time delay of collecting a sample and waiting
for analysis of a sample at a laboratory.
Please select a site from below to start viewing data.
You also can read more about the methods, measured constituents, and disclaimers
by using the navigation bar at the top of each page.
Map Legend
|
Continuous Water-Quality Gage
|
|
Discontinued Continuous Water-Quality Gage
|
| Cache Slough at Ryer Island, CA |
11455350 |
Solano |
Jul. 2008 to Jul. 2013 |
| Cache Slough at South Liberty Island near Rio Vista, CA |
11455315 |
Solano |
Dec. 2010 to Present |
| Colorado River Below Parker Dam, AZ-CA |
09427520 |
San Bernardino |
Jan. 2014 to present |
| Georgiana Slough near Sacramento River, CA |
11447903 |
Sacramento |
Oct. 2011 to Jan. 2015 |
| Liberty Cut at Little Holland Tract near Courtland, CA |
11455146 |
Yolo |
Jan. 2014 to Jan. 2019 |
| Little Holland Tract at North Breach near Courtland, CA |
11455143 |
Yolo |
Aug. 2014 to May. 2018 |
| Little Potato Slough at Terminous, CA |
11336790 |
San Joaquin |
Oct. 2012 to Jan. 2015 |
| Middle River at Middle River, CA |
11312676 |
San Joaquin |
Oct. 2010 to Sep. 2020 |
| Miner Slough At Highway 84 Bridge, CA |
11455165 |
Solano |
Jul. 2008 to May 2015 |
| Prospect Slough at Toe Drain near Courtland, CA |
11455167 |
Solano |
Oct. 2014 to May. 2018 |
| Sacramento River Deep Water Ship Channel near Rio Vista, CA |
11455335 |
Solano |
Aug. 2008 to May 2015 |
| San Joaquin River at Jersey Point, CA |
11337190 |
Contra Costa |
Oct. 2011 to Oct. 2014 |
| San Joaquin River below Garwood Bridge at Stockton, CA |
11304810 |
San Joaquin |
Oct. 2010 to Dec. 2014 |
| Toe Drain at Mallard RD near Courtland, CA |
11455139 |
Yolo |
Aug. 2014 to Dec. 2016 |
