The Ten-Minute Weekly Mosquito Yard Check

Mosquitoes develop in standing water, and in a home yard much of it sits in objects you own. Here is a ten-minute route, in the order you would walk it.

Why weekly, and why a teaspoon matters

The CDC's guidance is short. Once a week, "empty and scrub, turn over, cover, or throw out items that hold water, such as tires, buckets, toys, pools, birdbaths, flowerpot saucers, or trash containers" (CDC, updated Aug. 28, 2024).

Ventura County asks for the same weekly pass. Containers refill with every rain and sprinkler cycle.

Size matters less than you think. Ventura County's invasive Aedes page states that Aedes aegypti and Aedes albopictus can lay eggs in a container holding "as little as a teaspoon of water." A bottle cap counts. So does the dent in a tarp.

Why scrub, not only dump

The CDC's Aedes life-cycle page (updated Apr. 16, 2024) says females "lay eggs on the inner walls of containers with water, above the waterline," and that the eggs "can survive drying out for up to 8 months." Dumping alone can leave them on the wall for the next rain. That is why the CDC says "empty and scrub," and why the brush matters.

The route: front door to back fence

Bring a flashlight and a brush. Walk the same loop every week so nothing gets skipped.

1. Front porch and entry

• Flowerpot saucers. Lift every pot. Tip the saucer, wipe it, set it back. Or fill it with sand, or skip saucers on outdoor pots.
• Decorative bowls and urns. Anything with a lip holds water.
• Bromeliads and plants that cup water. Flush the water-holding centers with the hose.

2. Along the side of the house

• Gutters. Leaves clog them and leave a long, shallow pool. Clear them, or have them cleared.
• AC condensate line. The drip often lands in a low spot that never dries.
• Drip-line emitters and leaky spigots. Fix slow leaks that keep a patch wet all week.
• Trash and recycling bins. Check the lid and the bottom of each bin. Keep lids closed.

3. The back yard

• Buckets, watering cans, wheelbarrows. Turn them over or store them under cover.
• Tarps and covers. Pull them tight or drape them so water runs off. Check every fold.
• Toys. Wagons, sandbox lids, kiddie pools. Tip them and store them on their side.
• Pet bowls. Scrub and refill outdoor bowls at least weekly.
• Bird baths. Dump, scrub, refill weekly.
• Tires. Drill drainage holes, store them under cover, or recycle them.
• Yard drains and catch basins. Lift the grate if you can and look. Clear leaves so water flows.

4. Pools, spas, ponds, and fountains

• Pool and spa covers. Rain pools on top of a cover. Pump it off or use a cover with drainage.
• A pool you are using. Keep the pump and filter running on their normal schedule. The pool to worry about is the one nobody is maintaining.
• Unused pools, ornamental ponds, fountains. Keep the fountain pump running, or drain what you no longer use. For water you want to keep, many districts give free mosquitofish, including Ventura County and San Diego County. Ask yours.

For water you cannot dump

Some water has to stay: a rain barrel, a pond with no fish, a low spot that holds water after storms. One option is a larvicide based on Bti (Bacillus thuringiensis subsp. israelensis), sold in forms such as mosquito dunks. The EPA (updated June 2, 2026) describes Bti as a naturally occurring soil bacterium whose toxins affect only the larvae of mosquitoes, black flies, and fungus gnats. Choose an EPA-registered product and follow the label for where and how to use it. Rain barrels can also be sealed or screened with fine mesh.

The renter and balcony version

You do not need a lawn for this. On a balcony or small patio, the list is shorter:

1. Every saucer under every pot.
2. Watering cans and buckets, stored upside down.
3. Pet bowls, rinsed and scrubbed weekly.
4. Any tray, cooler, or decorative bowl that catches rain.
5. Drips from an upstairs unit or an AC line landing on your space.

If the problem is a clogged building gutter, a shared drain, or a common-area fountain, tell the property manager in writing and keep a copy.

Printable mosquito yard checklist

Check the boxes once a week.

• Flowerpot saucers tipped and wiped
• Decorative bowls and urns emptied
• Bromeliads and water-holding plants flushed
• Gutters checked for standing water
• AC condensate and drip-line puddles checked
• Trash and recycling bin lids closed, bottoms dry
• Buckets, watering cans, wheelbarrows turned over
• Tarps pulled tight, folds checked
• Toys and kiddie pools tipped and stored
• Pet bowls scrubbed and refilled
• Bird bath dumped, scrubbed, refilled
• Tires covered, drilled, or removed
• Yard drains and catch basins cleared
• Pool and spa covers pumped off
• Ponds and fountains running, stocked with fish, or treated per label

When to call the district instead

Some problems belong to your local mosquito program. Call when:

• A neighbor's pool looks abandoned. Many districts take these reports.
• There is standing water you cannot reach or do not control, such as a vacant lot or a blocked public drain.
• You are getting bitten a lot during the day. Daytime biting can point toward invasive Aedes, which Ventura County's page says "commonly bite during the day." Read more in the daytime-biting mosquito guide.

In Ventura County, the hotline is (805) 658-4310. Elsewhere, find your program through the NPIC list of mosquito control agencies by state, or use our find-help page. The CDC notes there is no national mosquito-control agency, so the work is local and services vary by district.

What the county does vs what you do

More on that split: what the county does about your yard.