State Water Project – Water Quality Data


State Water Project – Water Quality Data
The District obtains virtually all of its water supply from the California Aqueduct of the State Water Project (SWP). Use the links below to obtain SWP water quality data.  Note that water quality can vary significantly from month to month and year to year.  For example, salt content (EC) is lower in spring than in the fall and lower in wet water years than dry water years.  The Engineering Department can provide assistance upon request.

The closest SWP sampling points to the District are:

“Check 29” is upstream of the District near Taft Highway;  It is downstream of banking project pumping.

“Check 41” is downstream of the District near the discharge of Edmonston Pumping Plant south of the Tehachapi Mountains.

For recent daily and monthly water quality data for EC, pH, turbidity, temperature

Link to

For Nitrate and Nitrite in the California Aqueduct at Check 29 (Station KA024454, Highway 119):  Nitrate and Nitrite in CA Aqueduct at Check 29 (Station KA024454, Highway 119)

Aqueduct Water Bacteriological Analysis, Samples taken at District Headquarters:
Bacterial Analysis Data