California is rewriting its well rules for the first time since 1991, and comments are open until January 7
The Department of Water Resources released the draft Bulletin 74 well standards on November 5. The minimum rules govern how wells are built, changed, maintained and taken out of service, and Permit Sonoma has pointed county well owners to the comment window.
SONOMA: California's basic rulebook for wells is open for public comment for the first time in a generation. The Department of Water Resources released the draft of its updated Bulletin 74 well standards on Thursday, November 5, and will take comments through Thursday, January 7, 2027. The standards were last updated in 1991.
Bulletin 74 sets the statewide floor for four kinds of wells. The list runs from ordinary water wells to monitoring wells, and it takes in cathodic protection wells and geothermal heat exchange wells along the way. The rules reach every stage of a well's life, from construction through alteration and maintenance to destruction, and their stated purpose is to protect the quality of the state's groundwater.
Why a state rulebook lands in the valley
Permit Sonoma flagged the update for its own readers in its October department updates, addressing the notice to anyone who owns a well or works in well drilling. The Sacramento document matters on valley parcels because of how it travels: once the update is complete, the department will send Bulletin 74 to the State Water Resources Control Board, whose job is to turn it into a model well ordinance for the whole state. Cities, counties and water districts then adopt local ordinances that meet or exceed the state standard. Local enforcing agencies issue the well permits and carry out the inspections.
The draft addresses the practical anatomy of a well: siting it away from pollution sources, casing materials, the materials, dimensions and placement of annular seals, surface features such as pads, locks and covers, well development, and the rules for rehabilitation, repair, deepening and final destruction. The reasoning, as the department states it, is that a well can become a pathway for pollution to reach groundwater: poor quality water, pollutants or chemicals can enter a well and move through it into groundwater, or pass from one underground layer into another.
How to comment, and what happens next
The department lists four routes for comment during the review period: an online comment form, electronic mail, hard copy mail, and spoken comments at two virtual public meetings. The meetings are set for Wednesday, December 9, from noon to 3 p.m. Pacific Time, and Friday, December 11, from 10 a.m. to 1 p.m. Pacific Time. The draft, a companion annotated version and the comment form are all linked from the department's well standards page.
The draft did not arrive quickly. A technical advisory committee of 81 representatives, with expertise across well permitting, design, construction, maintenance and destruction, advised the department through 2021 and 2022, and the draft itself was prepared between spring 2022 and spring 2026, with state and partner agency reviews running through the spring and summer of 2026. From here, the department plans final revisions in winter and spring 2027, with approval and transmittal to the Water Boards tentatively set for October 2027.
For valley households and farms that draw on a private well, the practical point is the calendar, and the status. What DWR released this week is a draft, not a rule in force: local permitting under existing ordinances remains the working framework until the State Water Board has acted and local ordinances have followed. The window to shape what comes next closes on January 7.
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