A renters' city: who fixes what when roaches show up
Of roughly 30,400 occupied homes in Alhambra, about 17,900 are rented, and roughly 11,100 units are in apartment buildings of five or more homes, close to 1,800 of those in complexes with at least 50. German cockroaches are the indoor species most associated with multi-unit housing in California, and in a building they rarely stay in one kitchen.
That splits the work between two people. A tenant can keep counters clean, store food in sealed containers and clear the cabinets before a visit; the owner or manager controls access to neighboring units, plumbing repairs and the gaps around pipes. We write up which units and openings need attention so both sides know their part, and we can plan treatment unit by unit or across the whole building.
If a rental's cockroach problem is not being dealt with, LA County Environmental Health is the agency that investigates complaints about rental housing and apartments in Alhambra, as it does in every city of the county except Pasadena, Long Beach and Vernon.
Sources: [1][6][4]
Pre-war houses and postwar apartment blocks on the same street
Alhambra's housing spans almost a century: about 7,500 homes, close to a quarter of the city's total, were built in 1939 or earlier, while thousands more went up between the 1950s and the 1980s. The median home dates to 1960. That mix means two quite different cockroach situations can sit side by side.
In the older houses, the large reddish American cockroach is the more likely visitor. Its home base is the sewer system, and it reaches ground-floor rooms through cracked lines, open cleanouts or a drain trap that has gone dry. In the apartment buildings, the small German cockroach usually breeds indoors, close to the kitchen and bathroom. One calls for drain and entry-point work, the other for baiting inside cabinets and appliances, so we confirm the species before treating.
Sources: [1][6]
Closures on Main Street and Valley Boulevard
LA County Environmental Health inspects Alhambra's restaurants, and vermin has closed several of them in recent years. Colorado Boulevard, compiling county data, listed two restaurants on W. Valley Blvd closed for vermin infestation in May and June 2024, each reopening within a few days. In March 2025, two more restaurants on Main Street, one on E. Main St and one on W. Main St, were closed for vermin infestation on consecutive days.
The county's reports use the word vermin for insects and rodents alike and do not say which pest was found, so these closures are not proof of cockroaches. They do show what is at stake for a kitchen on either corridor. For Alhambra kitchens we come in when the line is quiet, early morning or after the last ticket, work through the walk-in, dry goods shelving, dish pit and drains, choose only products whose labels allow food-area use, and hand over a dated service report the manager can keep for inspectors.
Sources: [3][2][4]
A prep list the whole household can follow
About a third of Alhambra residents age 5 and older speak Chinese at home and nearly a quarter speak Spanish, according to census estimates. Getting cabinets emptied and food sealed before a visit matters as much as the treatment itself, so instructions have to work for everyone in the home.
We walk through the prep steps in English or Spanish and leave them on paper, and family members who read Chinese can find our service information on PesPro's Chinese-language site. One more practical note: Alhambra is in the San Gabriel Valley Mosquito and Vector Control District, but that agency deals with mosquitoes, not roaches, and sends cockroach callers to private companies.
Sources: [1][5]
