What to Expect During a Property Visit

Delta Mosquito and Vector Control District performs over 800 property inspections each season.

These inspections are critical to controlling mosquito populations and lowering mosquito-borne disease risk within our communities.

The District will never charge you for conducting these inspections.

The importance of mosquito control

In our area, we have 16 species of mosquitoes of public health concern because of their high biting nuisance and potential to carry disease.

Some Culex species, like Culex quinquefasciatius or Culex tarsalis, are capable of transmitting West Nile virus and St. Louis encephalitis virus when an infected mosquito bites a human. No treatments or vaccines are available for people.

Aedes aegypti are capable of transmitting Zika, Dengue, Chikungunya, and Yellow Fever virus when an infected mosquito bites a human. Yellow fever is the only disease with a vaccine available in the United States.

What are Vector Control Technicians looking for during an inspection?

That’s very simple! We’re looking for containers or items that hold water for more than 3–4 days. Mosquitoes need stagnant water to go through their life cycle, and a mosquito source can be as small as a bottle cap and as large as an unmaintained swimming pool.

What do I need to do?

You can wait for the inspection day listed on the door hanger, or call the District to schedule a different day. It is helpful if you are available to go over inspection results, but if not, you can inform the District that you will leave a gate to the backyard open and put away dogs. The technician will leave your inspection results at the door.

Services During an Inspection

Larvae Inspections

Larvae Inspections

Our technician will search various backyard water sources for the presence of immature mosquitoes (larvae or pupae).

Source Reduction

Source Reduction

We use an integrated vector management strategy to remove or control water sources where immature mosquitoes grow, stopping them from developing into biting adults. This reduces the size of the mosquito populations and interrupts the transmission of mosquito-borne diseases.

Large Water Sources

Large Water Sources

Unmaintained swimming pools, large ponds and fountains, watering troughs and street gutters.



The technician will explain what mosquitoes sources were found on your property, how to prevent further mosquito production, and how to prevent mosquito bites.


Mosquito Life Cycle

Only female mosquitoes bite! Female mosquitoes need protein from a blood meal to produce eggs. After taking a blood meal, the females look for the perfect water source, as small as a bottle cap or as large as an unmaintained swimming pool, to lay their eggs.

Service Request? Get in Touch.


1737 West Houston Ave
Visalia, CA. 93291
Ph. 559-732-8606
TF. 877-732-8606
Fax. 559-732-7441


7:30 AM to 4:00 PM (excluding holidays)