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UC Cooperative Extension Ventura County
669 County Square Dr. Suite 100
Ventura CA 93003
Phone: 805.645.1451
Fax: 805.645.1474

Office Hours
Our offices are currently closed due to the COVID-19 pandemic, and our team is telecommuting from home. We are available via phone and email. 

Click here for our office directory: Contact/Staff Info


Soil Testing Laboratories

Note: The laboratories in this listing are for informational purposes only and do not constitute any endorsement or recommendation by UC Cooperative Extension. If you are a laboratory that would like to be added/updated, please email amrowe@ucanr.edu


Name Address Phone # and Hours $ Soil Analysis Notes
Fruit Growers Lab 853 Corporation St, Santa Paula, CA 93060 (805) 392-2000             M-F 8am-5pm Basic soil organic matter analysis $21. Sovita respiration test runs $40.  Can drop off sample anytime during business hours, need about 2 lbs of soil (about ½ a gallon zip plastic bag) 
Precision Agri-Lab  24730 Avenue 13, Madera, CA 93637 (559) 661-6386
M-F 8am-5pm 
$65 Same as above
Dellavalle Laboratory, Inc  1910 W. McKinley Ave, Suite 110,
Fresno, CA 93728
(559) 233-6129
M-F 8am-5pm
$52-$88 Same as above
A&L Western Labs  1311 Woodland Ave, Suite 1
Modesto, CA 95351 
(209) 529-4080
M-F 8am-5pm
$35 Drop off during business hours, about ½ a gallon zip plastic bag.