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The Threat

If left unmaintained, a single swimming pool can produce up to 3 million mosquitoes in one month. Pools that produce mosquitoes are public health risks. Controlling mosquitoes in non-functional pools is a year-round challenge and requires significant effort and planning to remain mosquito-free.

With more than 2,300 pools to monitor, the District needs cooperation from residents. While many pools are clean and functional, there are pool conditions that require multiple compliance checks every year. This can be resource-intensive and inconvenient for residents.

The Solution

Mosquito control is a shared responsibility. All residents must make sure their swimming pools are clean and functional, or do not pose a public health risk by producing mosquitoes.

The use of long-term mosquito management strategy for pools includes a working pump and filtration system, and a regular chemical treatment schedule.

The District provides support programs for residents, such as providing assistance while a pool is restored to being clean and functional.

Support Programs

1. Short-term Pesticide Treatment - A clean and functional pool is the best way to stay mosquito-free. Pesticide treatments are available as a short-term solution for residents who are in the process of restoring their pool to a clean and functional state. The District will work with the resident to provide chemical control for up to six months as long as the resident is actively pursuing a permanent solution.

2. Empty and Dry Pool Support - An empty and dry pool is kept completely dry and free of debris, year-round. The District needs confirmation multiple times throughout the year to ensure no water has been left to collect at the bottom. Confirmation can be completed two ways:

• Photo Confirmation: When registered for a photo confirmation, the resident can confirm the condition of the pool by sending a picture to the District via text or email. The District will request up to four photos throughout the year either text or email. Each request will include a unique confirmation code. The resident will respond within two weeks with a photo of the pool that includes the confirmation code written on a piece of paper in the foreground. The pool must be empty and dry.
• Schedule an Physical Inspection: When registered for a physical, on-site confirmation, the District will send out a vector control specialist to visit the property and confirm the pool's condition. The District will request up to four inspections a year, which will be scheduled in advance through phone, text, or email. Residents must respond within two weeks of receiving an inspection request from the District

3. Mosquito Fish Program - The mosquito fish, Gambusia affinis, is a topminnow from North America that is used around the world to control mosquito larvae. These fish are a low-maintenance, long-term treatment strategy to prevent the development of mosquitoes in non-functional, partially-filled swimming pools. After initial assessment of the pool, the District will deliver the fish, free of charge. Regular health checks will be schedule and arranged with the resident. The resident is responsible for reporting to the District if the fish die or are unsuccessful.