Ultimate Guide to Mosquito Prevention in Southern California

Two illustrated characters next to the words "MOSQUITO SOLUTIONS" on a blue background.

Mosquitoes can quickly become a nuisance and pose serious public health risks by spreading diseases like West Nile virus and dengue. Fortunately, there are several effective ways to reduce mosquitoes around your home. Whether you're trying to eliminate mosquito sources, protect your family from bites, or report mosquito problems, these mosquito prevention solutions can help keep your property mosquito-free.

The best method to reduce mosquitoes on your property is to limit the number of potential sources.

Inspect around and inside your property for potential mosquito sources, even as small as a spoonful of water. If standing water is found, remove it.

The image illustrates that without water, there are no mosquitoes, emphasizing the importance of water management to control mosquito populations.

If the source is not removed, you must check weekly for standing water to prevent mosquitoes. Remember to look for mosquito sources every week and after rain events.

man dumping out old water out of tire, bucket and kiddy pool

How to Prevent Mosquitoes Around Your Home

Common Household Items 
A yellow bucket with green contents and a spilled red cup with liquid and cartoon germs.
BUCKETS & CONTAINERS - Buckets, watering cans, drinking glasses, cups, bottle caps, or trash that can hold water should be stored, turned over, or thrown away.
Illustration of a potted plant with large leaves against a blue background.
POTS & PLANT SAUCERS - Empty saucers or flush them out with a garden hose once a week. Remove saucers from under plants. Place fine aquarium gravel in saucers.
A cartoon of a red barrel catching water from a downspout beside a house.
RAIN BARRELS - Cover the rain barrel with an insect screen and tightly secure it, even the screw top. Install small pieces of screen over any other holes, such as overflow valves or connection points, and secure.
A bird on a birdbath, with a toy truck and watering can nearby.
CONTAINERS - Throw away, turn over, empty once a week, or drill holes in the bottom of any container capable of holding at least a teaspoon of water.
A green recycling bin full of items, next to a full grey trash can, against a blue background.
GARBAGE & RECYCLING BINS - Keep cans covered with lids or drill holes in the bottom.
A yellow water bowl with paw prints against a blue background.
PET WATER BOWLS - Scrub and rinse out once a week.
Stack of car tires on a blue background.
TIRES - Dispose of old tires at your local recycling facility. If used for playground equipment, drill holes for water to run. If on the ground, ensure holes are not blocked by debris.
An illustration of a brown object resembling a rock with a straw and waves, possibly depicting a drink served in a whimsical way.
TARPS & COVERS - Drain water trapped in folds and arrange so water runs off.
A yellow bucket with green contents and a spilled red cup with liquid and cartoon germs.
Illustration of a potted plant with large leaves against a blue background.
A cartoon of a red barrel catching water from a downspout beside a house.
A bird on a birdbath, with a toy truck and watering can nearby.
A green recycling bin full of items, next to a full grey trash can, against a blue background.
A yellow water bowl with paw prints against a blue background.
Stack of car tires on a blue background.
An illustration of a brown object resembling a rock with a straw and waves, possibly depicting a drink served in a whimsical way.

 

Building Structures 
Illustration of a red play castle with a yellow slide against a blue background.
PLAYGROUND EQUIPMENT - Remove and dispose of. If it must be stored, put it under cover. Be sure the water drains off.
Illustration of a corner of a building with a red tile roof and a gutter system.
GUTTERS - Clean so water runs freely.
Illustration of a wooden picket fence against a blue sky.
HALLOW FENCE POSTS (WITHOUT CAPS) - Put caps on open chain links or plastic fence posts.
Illustration of a house with red roof, rock, and puddle on grass with surrounding water.
DRAINAGE DITCH OR CULVERT - Remove grass and weed clippings so water can flow and/or drain freely. 
Silhouetted balcony and staircase against a blue background.
UNDER PORCHES & DECKS - Fill in depressions. Remove or turn over any stored items that hold water.
A tap with running water and an AC unit against a blue background.
OUTDOOR FAUCETS & AIR CONDITIONING - If puddling, repair the faucet. Place rocks under the window air conditioner to ensure water runs off or fill the hole with dirt.
A flat, stylized illustration of a camera's detachable lens on a blue background.
SUMP PUMPS - Cover with screening.
Illustration of a red play castle with a yellow slide against a blue background.
Illustration of a corner of a building with a red tile roof and a gutter system.
Illustration of a wooden picket fence against a blue sky.
Illustration of a house with red roof, rock, and puddle on grass with surrounding water.
Silhouetted balcony and staircase against a blue background.
A tap with running water and an AC unit against a blue background.
A flat, stylized illustration of a camera's detachable lens on a blue background.

 

Backyard/Garden 
An animated elderly couple outside a house; the man is reading a newspaper, and the woman is gardening.

BIRD BATHS
Dump out once a week or flush out with a garden hose.

ORNAMENTAL PONDS AND FOUNTAINS
Filter water or apply larvicide to prevent breeding.

WHEELBARROWS
Store upside down when not in use.

OUTDOOR GRILLS
Keep covered. Ensure the vent is closed.

BASES AND STANDS OF PATIO FURNITURE
Fill with sand or, if filled with water, be sure to screw on the plug. Keep water out of depressions in the stand.

BROMELIADS OR PLANTS THAT HOLD WATER
Turn the plant over to dump water. For plants too large, flush out cavities with a garden hose once a week. Discard or remove from landscaping if possible

Children's Toys 
A cartoon of a child with a magnifying glass, a sandbox, a toy truck, and a bucket with a shovel.

PORTABLE BASKETBALL HOOPS
Ensure caps for fill holes are in place; replace if lost.

KIDDIE POOLS
Empty or change water in kiddie pools every 5-7 days. Store indoors or turn over when not in use.

SAND BOXES
Drill small drainage holes on the bottom of the sandbox.

TOYS, WAGONS, ETC.
Keep toys turned over or inside when not in use. If water can get inside a plastic toy, so can a mosquito—drill drainage holes in the bottom.

DEFLATED TOYS/POOLS
Drain off water, dry out, and store indoors when not in use.

Recreation 
Illustration of a red play castle with a yellow slide against a blue background.
A stylized illustration of a biological cell undergoing cytokinesis, depicted in red and green, against a blue background.

BOATS AND CANOES
Pump out bilges. Turn over canoes and small boats. If turning over is not possible, dump out after each rain.

JET SKIS
Rinse out the foot depressions with a hose.

POOL PUMPS AND DRAINS
Check weekly to ensure water is draining from the area.

OLD PLAYGROUND EQUIPMENT
Remove and dispose of. If it must be stored, put it under cover. Be sure the water drains off.

POOLS AND SPAS
Turn over kiddie pools when not in use. Contact the District when swimming pools and spas are in nonoperational condition. If draining, wet/dry vacuum to remove water.

Inside the Home 
Illustration of pink flowers in a clear vase against a blue background.
FLOWER VASE WITH FLORAL ARRANGEMENT - Replace water every few days. Scrub the interior of the vase to eliminate mosquito eggs.
An illustration of a white toilet with an orange toilet brush on a blue background.
TOILET BRUSH HOLDER - Drain water in the container frequently.
A yellow water bowl with paw prints against a blue background.
PET WATER BOWLS - Rinse out once a week
A potted plant with large, heart-shaped leaves on a blue background.
POTTED PLANTS WITH SAUCERS - Empty saucers once a week. Remove saucers from under plants.
Illustration of a bathroom sink and vanity cabinet on a blue background.
UNDER SINK - Keep space beneath the sink clear and free of dampness.
Illustrated Christmas tree with festive ornaments and lights on a blue background.
HOLIDAY ITEMS: TREE STANDS Replace water at least once a week and scrub thoroughly before storage.
Illustration of a two-tiered fountain with water spray, against a blue background.
DECORATIVE FOUNTAINS OR WATER FEATURES - Maintain in operational condition or drain entirely.
Illustration of a toilet with an open lid on a blue background.
STAGNANT TOILET WATER - Flush water in the extra toilet frequently.
Illustration of pink flowers in a clear vase against a blue background.
An illustration of a white toilet with an orange toilet brush on a blue background.
A yellow water bowl with paw prints against a blue background.
A potted plant with large, heart-shaped leaves on a blue background.
Illustration of a bathroom sink and vanity cabinet on a blue background.
Illustrated Christmas tree with festive ornaments and lights on a blue background.
Illustration of a two-tiered fountain with water spray, against a blue background.
Illustration of a toilet with an open lid on a blue background.

 

Three Simple Steps to Reduce Mosquitoes

  • Tip out stagnant water weekly.
  • Toss unused containers that collect water, or store them in a dry area. 
  • Protect yourself with an EPA-registered mosquito repellent.
A person is tending to a potted plant in a garden, showcasing their interest in gardening and plant care.

Frequently Asked Mosquito Prevention Questions

Why do I have mosquitoes if my yard is clean? 

Even if your yard is clean and well-maintained, you can still have mosquitoes. Mosquitoes can fly in from neighboring properties, parks, green spaces, or other nearby areas where standing water allows them to grow. Female mosquitoes only need a small amount of water, such as in clogged gutters, flowerpot saucers, bird baths, or neglected containers, to lay their eggs. Some mosquito species can also travel several hundred feet in search of a blood meal.

To reduce mosquitoes around your home, inspect your property every week and tip out standing water, toss unused containers, and protect yourself with an EPA-registered mosquito repellent when spending time outdoors. If you're experiencing an unusual number of mosquitoes despite taking these steps, contact SGV Mosquito for a free property inspection. Our trained technicians can identify hidden mosquito sources and recommend effective mosquito control solutions.

When are mosquitoes most active? 

Mosquito activity depends on the species, but many mosquitoes are most active during the early morning and around dusk, when temperatures are cooler. However, invasive Aedes mosquitoes, including the invasive mosquitoes found throughout Southern California, are aggressive daytime biters and are most active during the early morning and late afternoon, though they can bite throughout the day.

To reduce your risk of mosquito bites, wear an EPA-registered mosquito repellent whenever you're outdoors, especially during peak mosquito activity.

How much standing water do mosquitoes need? 

Mosquitoes need surprisingly little standing water to grow. Some species can lay their eggs in as little as a bottle cap of water or a spoonful.  It only takes about one week for mosquito eggs to develop into biting adults under warm conditions. Common mosquito sources include flowerpot saucers, buckets, bird baths, clogged gutters, children's toys, tarps, old tires, and any container that holds water for several days.

When should I call vector control? 

You should contact SGV Mosquito if you're experiencing an unusually high number of mosquitoes, notice mosquito sources on your property, or find standing water that you cannot safely remove. Our trained vector control technicians provide free mosquito inspections for residents and can identify hidden mosquito sources, recommend effective mosquito control solutions, and, when necessary, treat mosquito breeding sites.

You should also contact SGV Mosquito if you notice neglected swimming pools, abandoned properties with standing water, or receive frequent mosquito bites despite removing standing water around your home. Early reporting helps reduce mosquito populations and lowers the risk of mosquito-borne diseases like West Nile virus and dengue in the community.

If you're unsure whether a mosquito problem requires professional assistance, we're here to help. Request a free property inspection to protect your home and neighborhood from mosquitoes.