Boaters visiting Lake Berryessa are required to comply with screening and inspection to prevent the introduction of invasive zebra or quagga mussels. Boaters are asked a series of questions by trained staff to determine if further inspection or decontamination is needed to prevent the spread of these invasive mussels.

The new guide provides well owners important information on how to maintain their well, along with a general overview of well owner responsibilities, including the need to control and prevent potential contamination of our groundwater. The guide was produced by Napa County to help all of us protect our groundwater resources and our health.

Thank you to all who participated! The Napa County 2017 Watershed Symposium was a great success. Featured topics included hydrology, fish, water quality, groundwater, climate change, and a means to value and monitor our natural resources. See the program and details and answers to audience questions.

Napa County launches a "Do it Yourself" groundwater monitoring program. This program allows Napa County residents to borrow a well water-level monitoring tool for free to measure their own water depth! How can you get started?