Historical Timeline
![May contain: nature, outdoors, farm, countryside, rural, human, person, mammal, horse, animal, farm plow, vehicle, transportation, bike, and bicycle](https://streamline.imgix.net/3d157746-1a2e-4ba9-b26e-424857d4b72f/d5a9cbcd-3f63-47da-aa69-361428f5da02/archive%201.jpg_0.jpg?ixlib=rb-1.1.0&w=2000&h=2000&fit=max&or=0&s=9503809b14df9f8cbca66b1ba8f3f6b2)
Early 1900s: The San Rafael Improvement Club is in charge of mosquito control.
1903-1905: Research on salt marsh mosquitoes was conducted in Marin County by Professor C. W. Woodworth (1903) and by Professor H. J. Quayle (1905).
May 25, 1915: California State Legislature passed the Mosquito Abatement Act. This act permitted local governments to collect revenues and form special districts to protect the public from mosquitoes and mosquito-borne diseases.
November 6, 1915: The first district in California is formed: Mosquito Abatement District No. 1; also known as the Marin Mosquito Abatement District (MAD).
![Maso Map of district](https://streamline.imgix.net/3d157746-1a2e-4ba9-b26e-424857d4b72f/d90cf8cb-f224-4473-9096-d00aa5a415a8/masomap2.gif?ixlib=rb-1.1.0&w=2000&h=2000&fit=max&or=0&s=02414c5fb590ee7feaa48aaf423bdea6)
1976: MAD annexed the central area of Sonoma County, becoming the Marin/Sonoma Mosquito Abatement District.
1981: District headquarters is relocated from San Rafael to Petaluma.
1982: The Town of Sonoma and its surrounding areas are annexed into the District.
1995: MAD changes its name to Marin/Sonoma Mosquito and Vector Control District (MSMVCD) to reflect the additional services now offered to the public. Those services include eradication of in-ground yellowjacket nests and provision of rodent control advice.
2000: District headquarters moves again, this time from Petaluma to the present location in Cotati.
2004: Voters approve annexation of all the unincorporated areas of Marin and Sonoma counties, forming Benefit Assessment District #2. This allows for vector control services to be made available to all residents of the two counties.
The District now services approximately 763,000 residents in a nearly 2,300 square mile service area. Each year the District responds to over 4,500 requests for service from the public.