Business Hours: Monday - Friday 7 am - 5 pm

24-Hour Emergency Service
Proudly Serving Sonoma, Napa, Marin, Lake & Mendocino Countries 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

Our drilling staff represents over 170 years of drilling experience, giving Weeks the unique ability to handle every drilling project. From residential to commercial, large or small, Weeks can do the job!


From troubleshooting your current system to custom designing a new system, our pump staff has the knowledge and expertise to help you in your time of need. We are at your service 24 hours a day!


Weeks’ water treatment technicians can install water treatment filtration and other equipment to ensure that your water is sparkling clean and free of contaminants. Weeks is equipped to meet your needs!

Public Water Systems

Our state-certified water system operators monitor, maintain and operate many public water systems. We ensure that local schools, wineries, businesses and small communities have safe water that meets state standards.

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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