Business Hours: Monday - Friday 7 am - 5 pm

24-Hour Emergency Service
Proudly serving Sonoma, Napa, Marin, Lake & Mendocino Counties since 1906
Welcome To Weeks Drilling & Pump Co.


As one of the largest groundwater firms in the state, Weeks Drilling & Pump Co. has been serving Northern California since 1906. With a longstanding reputation for integrity, Weeks offers a complete range of water supply solutions. Our four departments work closely with one another to serve residential, commercial, and municipal customers. From drilling a well and installing a pump system, to designing and installing filtration systems, to managing many local public water systems, Weeks applies unique multi-generational knowledge and experience to ensure our community has safe, clean water. 
When you think of water, think of Weeks!

Our Services


Water Well Drilling Services

Since 1906 Weeks Drilling & Pump Co. has completed more than 20,000 well projects throughout Northern California and the West Coast.

Pump Systems & Repair

We have the knowledge and expertise to troubleshoot your current system or to custom design a new system to fulfill your specific needs.

Water Treatment Systems

We offer a myriad of quality water treatment services performed by employees certified by the California Department of Public Health.

Public Water Systems

Our knowledge and experience will ensure that your public water system delivers safe water and is compliant with all regulations.

Customer Testimonials
Weeks has been our 60-year old well's caregiver for years. When it was time to replace the well, we contacted them. They were prompt with bids, patient with questions and concerns. Their team made what could have been a traumatic experience a rather enjoyable and educational ride. I would recommend them anytime; their customer service is priceless.
Shelly M. - Sebastopol, CA
Weeks has helped my family manage our well and water usage for over 25 years. Their service, expertise and guidance are invaluable. From well drill to water maintenance to water capture and drought mitigation, Weeks is my family's go to water-gurus. They are well priced, have unbeatable service and are longtime members and contributors to our community.
Daniel W. - Sebastopol, CA
Weeks really sticks to the contract...and ended up drilling a new productive well and installed 2 storage tanks, 1 pressure tank, a deep well pump system and an irrigation pump system. They always show up on time, are kind and polite, give you information, and do exactly what you expect them to do without any issues. I highly recommend Weeks Drilling.
Sven S. - Sonoma, CA

6100 Highway 12
Sebastopol, CA 95472



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