What the housing here looks like
Census estimates count 1,796 homes in Mayflower Village. Of those, 1,471 (about 82%) are detached single-family houses, 166 are mobile homes, 63 are attached houses and 96 are apartments in buildings of five or more units. About 73% of households own their home, and the median house was built in 1956.
LA County planners group Mayflower Village with four other unincorporated pockets under the name South Monrovia Islands. They describe the cluster as mostly postwar tract housing, with about 83% of homes built before 1979. A house close to 70 years old has probably been re-roofed and re-plumbed at least once, and repairs like that tend to leave gaps behind: an old vent opening that was never closed, a pipe hole under the sink filled with foam, a garage door that no longer sits flush on the slab. Those are the spots we check first.
Sources: [1][3]
The Santa Anita Wash and the spreading basin
Census Bureau maps show the Santa Anita Wash and a spreading basin, where runoff is held so it can soak into the groundwater, inside the community's boundary. Within about half a mile are the Sawpit Wash, the Santa Anita Channel, the Buena Vista Channel and the Rio Hondo. In its 2024 West San Gabriel Valley Area Plan workshop, the county proposed keeping the Sawpit Wash as a natural corridor for wildlife.
Rats are likely to use long channels like these as travel routes, and the plants and debris along the banks can shelter rodents a few feet from a back fence. On lots that back onto a wash or channel, we expect more rodent activity outdoors. There we start with the rear fence line, sheds, stacked wood and the foundation vents on the channel side. PesPro does not trap or remove wildlife. Our work there is keeping rats and mice out of the house.
Sources: [2][4]
West Nile virus in 2021, and the seasons since
The San Gabriel Valley Mosquito & Vector Control District's 2021 activity table has a row labeled "Unincorporated LA County (Mayflower Village)." It shows two West Nile–positive mosquito samples, first reported in October 2021. Each sample is a batch of roughly 10 to 50 mosquitoes from a single trap. The district counted 190 positive samples that year, including four in neighboring Arcadia and one in neighboring Monrovia.
Mayflower Village has not appeared by name in the district's tables for 2022 through 2025. Its neighbors did: Arcadia had 14 positive samples and Monrovia had seven in 2022, and each had one in 2023. The 2025 season was quiet, with eight positives across the whole district. The California Department of Public Health lists the invasive mosquitoes Aedes aegypti and Aedes albopictus as present in Arcadia and Monrovia. The district reported 11 locally acquired dengue cases in the San Gabriel Valley in 2024, in Baldwin Park, El Monte and Pasadena, not in Mayflower Village.
PesPro does not provide mosquito control. The district serves this community (it is the agency that reported the 2021 samples), and mosquito questions go to it at (626) 814-9466.
Sources: [5][6][7][8][9][12][10]
Inside the state's citrus psyllid treatment area
The California Department of Food and Agriculture runs an emergency program against the Asian citrus psyllid, a small insect that can spread Huanglongbing, a bacterial disease of citrus trees. Its Los Angeles County treatment-area maps from March 2023 and November 2024 both list Mayflower Village inside a treatment area, along with Monrovia and South Monrovia Island.
This is a state plant-health program, not structural pest control. PesPro does not treat citrus trees or citrus pests, so questions about the treatment area go to CDFA. The listing does suggest that citrus grows in many yards here, and fruit on the branch or on the ground is food for roof rats. LA County Public Health's rodent guidance includes picking up fallen fruit.
Sources: [13][14][16]
Rats, fleas and which agency handles what
Los Angeles County Public Health recorded 220 flea-borne typhus cases in 2025, the highest count on record and up from 187 in 2024. About nine in ten patients were hospitalized. These are county-wide totals, not Mayflower Village figures. The county's prevention advice is to treat pets for fleas, keep trash covered and seal the openings animals use to get under or into a house.
The county's rodent guidance is specific: close gaps larger than about a quarter inch, clear fallen fruit and control fleas before trapping. The flea step comes first because fleas leave a dead rat and look for a new host. On a 1950s house we work in the same order: deal with fleas where needed, seal the roofline, vents and foundation, then trap.
The mosquito district does not handle rodents. For rodent questions, LA County points residents to its Vector Management Program at (626) 430-5450. PesPro handles the hands-on side: rats and mice inside and around the home.
Sources: [15][16][17][11]
Cockroaches in 1950s kitchens and mobile homes
No published report singles out cockroaches in Mayflower Village, so this section is based on the housing. In houses from the mid-1950s, German cockroaches usually settle where plumbing passes through cabinet backs and walls, in the warm space under the refrigerator and in the hinges of old cabinets. The larger American cockroaches are more likely to come up from the sewer through floor drains, laundry drains and gaps at the garage, mostly in warm weather.
The 166 mobile homes need a different inspection. Water and drain lines come up through the floor, and the space behind the skirting stays shaded and can stay damp around the plumbing. We bait the pipe openings from inside, check the underside and skirting for American cockroaches, and use gel bait and an insect growth regulator in the kitchen. We don't use sprays or foggers that drive German cockroaches deeper into wall and floor voids.
About 24% of residents age five and older speak Spanish at home, 13% speak Chinese and 5% speak Vietnamese. Our team explains findings and preparation steps in English and Spanish, and our website is also available in Spanish at pespro.com/es and in Chinese at pespro.com/zh.
Sources: [1]
