Business Hours: Monday - Friday 7 am - 5 pm

24-Hour Emergency Service
Proudly serving Sonoma, Napa, Marin, Lake & Mendocino Counties since 1906


Experience & Commitment

Weeks Drilling & Pump Co. is not just one of the largest groundwater firms locally and throughout California; its reputation for providing a complete range of water supply solutions is legendary. From well drilling, to pump system installation, and water treatment, we provide the services to suit any operation.

With a single phone call to Weeks, all of your water supply needs can be met. We have the equipment, knowledge, expertise, and commitment to customer service to handle your entire project from planning to completion.

Weeks Drilling & Pump Co. is committed to providing comprehensive well water care. All three departments — Drilling, Pump, and Water Treatment — work cohesively and smoothly to provide the best possible customer experience.

Water Well Drilling Staff

The Drilling Department can claim over 136 years of professional drilling experience and is proud to have completed over 20,000 well projects throughout Northern California and the West Coast.

Pump Service and Repair Staff

Our Pump Service and Repair Department has over 142 accumulated years of professional experience servicing and installing pumps in Northern California.

Water Treatment Staff

For more than 60 years Weeks has been providing innovative solutions to fit the specialized water supply needs for both residential and commercial customers.

Public Water Systems Staff

Since 1984 we have been providing professional services to small and very small regulated water systems. Our certified operators range up to T4 and D2 levels and our employees are individuals certified by the California Department of Public Health.


Contact us today if have any questions about our services, or schedule an onsite inspection and/or consultation visit. We provide customer service second to none!