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October 7, 2026

Altadena

The image promotes public health mosquito control services in your area, with a website link for more information.

Mosquito Control Treatments in Altadena

Mosquito control treatments are being conducted to reduce adult mosquito populations and lower the risk of mosquito-borne disease transmission.

Reason Elevated Mosquito and Disease Activity
Date Wednesday, October 7, 2026
Time  12:00 AM - 5:30 AM
 Product Used AquaDuet (Adult Mosquito Control), VectoBac WDG (Immature Mosquito Control)
About AquaDUET 

AquaDUET is a water-based pesticide used to control adult mosquitoes. It contains Sumithrin and prallethrin, synthetic pyrethroids that are similar to pyrethrins naturally found in chrysanthemum flowers. 

During Treatment
AquaDUET is applied as an ultra-low-volume (ULV) treatment, using a very small amount of product dispersed as fine droplets. At the application rate used for mosquito control, AquaDUET does not pose a risk to people or pets. Residents do not need to stay indoors during treatment. Those who prefer to reduce their exposure may choose to remain indoors during the application.

After Treatment
The active ingredients in AquaDUET break down quickly in sunlight. The treatment will not affect swimming pools or other items in your yard, and fruits and vegetables can be washed as you normally would before eating. 

Want to learn more?
View the AquaDUET product label or visit our Area-Wide Treatment FAQ linked below.

About VectoBac WDG 

VectoBac WDG is a biological larvicide used to control mosquitoes before they become flying adults. Its active ingredient is Bacillus thuringiensis israelensis (Bti). 

How It Works
VectoBac WDG is mixed with water and applied directly to areas where mosquitoes breed, including standing water, catch basins and other water-holding areas. It targets mosquito larvae in the water before they can develop into biting adults. vectobac-wdg-specimen-label

What Residents Should Know
Residents do not need to stay indoors during treatment. VectoBac WDG is not classified as hazardous under OSHA standards, and product testing found it to be essentially nontoxic to honey bees. 

Want to learn more?
View the VectoBac WDG product label or visit our Area-Wide Treatment FAQ linked below.

Treatment Area

Altadena

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