Some Extension offices offer pH testing. You can learn more about other forms of testing and testing locations by checking out this featured question: https://extension.oregonstate.edu/ask-expert/featured/how-do-i-test-my-soil

You can contact nearby Extension offices to inquire about types of soil testing they may offer. Unfortunately, the Multnomah County office is not currently open to the public. Here's the information for county offices that might be close by:

Washington County Extension
1815 NW 169th Place, Suite 1000
Beaverton, OR 97006

Hours of operation
Mon - Fri: 8:00 am-12:00 pm, 1:00 pm-4:00 pm
Phone:<personal data hidden>


Clackamas County Extension
200 Warner Milne Road
Oregon City, OR 97045

Hours of operation
Mon - Fri: 8:00 am-4:30 pm
Phone:<personal data hidden>

Hood River County Extension
2990 Experiment Station Drive
Hood River, OR 97031

Hours of operation
Mon - Thu: 9:00 am-4:00 pm
General phone number: Please leave a voicemail at<personal data hidden>