The publication is an informal compilation of Bulletin 74-81 and the draft supplemental, Bulletin 74-90. Although Bulletin 74-90 was not finalized by DWR nor officially adopted into the Model Well Ordinance by the State Water Resources Control Board, it has been adopted into local ordinances around the state.
To facilitate its use, DWR has combined the contents according to Table 1 (B74-90) of Bulletin 74-90 and made minor modifications in wording and formatting to improve readability.
DWR is no longer able to post the PDF versions of the original DWR Bulletin 74-81 and Bulletin 74-90 on their webpage since they do not meet accessibility standards. They are available on the Internet Archive: Bulletin 74-81 and Bulletin 74-90.