You almost certainly do have standing water. But you might not be able to see it. Mosquitoes need very little water to breed. A bottle cap full is enough for some species.
If you've walked your property, dumped the saucers, and flipped the kiddie pool, and you're still getting eaten alive, then you’re 100% justified in being frustrated. You really are doing the right things. But mosquitoes, as they often do, are exploiting sources that aren't obvious, and some of them might not even be on your property.
Start with your gutters. Clogged or slow-draining gutters hold water for days after irrigation or rain. You can't see it from the ground. Even a small section with leaf debris trapping an inch of water can give rise to dozens of mosquitoes every week. AC condensate lines are another common source of mosquitoes. Your unit is dripping water constantly in the warm months, and if it pools on a flat surface or in a low spot nearby, that makes it a breeding site.
Also worth considering since you’re living that sunny SoCal lifestyle: irrigation. Overwatered lawns, misaligned sprinkler heads, and poor grading create puddles in low spots that persist for days. A quarter-inch of water in a depression behind a planter bed is more than enough.
In Orange County, invasive Aedes mosquitoes lay eggs on moist surfaces just above the waterline. Those eggs survive for months dry and hatch the moment they're flooded by rain, irrigation, or condensation. So even if you dump all your standing water today, eggs deposited weeks ago on the inside of a pot or rim of a drain hatch next time those surfaces get wet. These mosquitoes also breed in impossibly small volumes. A discarded cap, a curled leaf, the threads of an uncapped pipe.
Your neighbor’s yard might also be another source you can’t control. Mosquitoes can fly hundreds of feet from when they breed. Neglected pools or untidy landscaping next door can send mosquitoes over to your house, looking for food come dusk.
If you’re an Orange County homeowner and you’re just sick dealing with mosquitoes, Mosquito Squad of North Orange County can help. Mosquito Squad provides treatments that cover the gaps that source reduction alone can't close. A technician inspects your property and figures out where the mosquitoes are coming from. Then they treat those areas and come back every 21 days to keep protection steady all year round.
