Millipedes are one of the most common nuisance invaders in Bellingham and Whatcom County, especially during our wet spring and fall when saturated soil pushes them out of gardens and mulch beds toward home foundations. They do not bite, sting, or damage structures, but they can appear indoors by the dozens and stain surfaces when crushed. Sasquatch Pest Control stops millipede migrations at the perimeter and keeps them out, backed by our 100% service guarantee with no long-term contracts.

How to Identify Millipedes

Millipedes are slow-moving, cylindrical arthropods, usually 1 to 1.5 inches long, ranging from dark brown to black with a hard, rounded body made of many segments. Unlike centipedes, they carry two pairs of short legs per segment, giving them a wave-like ripple as they crawl, and when threatened they curl into a tight coil. In our region they are found in moist soil, under mulch, leaf litter, rotting wood, and stones, and they wander onto patios, into garages, basements, and crawl spaces during wet weather.

Signs of a Millipede Problem

The most obvious sign is finding numerous slow-crawling, coiled, or dead millipedes along baseboards, in garages, basements, window wells, and on bathroom floors, particularly after heavy Pacific Northwest rains. Because they die quickly once inside a dry home, you often see a scattering of curled bodies near entry points such as door thresholds and foundation cracks. A faint almond or musty odor from their defensive secretions and small stains where they were crushed are also common indicators.

How Sasquatch Treats Millipedes in Whatcom County

Sasquatch starts with a detailed inspection to map entry points, moisture sources, and the outdoor harborage feeding the migration. We apply an exterior perimeter barrier treatment around the foundation, entry points, and window wells, treat mulch beds and other harborage zones, and use interior applications where needed to intercept millipedes already inside. Because they are moisture-driven and travel in waves, we emphasize excluding them at the structure and following up after major rain events, all covered by our 100% service guarantee.

How to Prevent Millipedes

Create a dry buffer between damp ground and your home by pulling mulch, leaves, grass clippings, and firewood back from the foundation and improving drainage so water flows away from the structure. Seal cracks in the foundation, gaps around doors and windows, and utility penetrations, and add or repair weatherstripping and door sweeps. Indoors, run a dehumidifier in basements and crawl spaces and fix leaks, since a dry interior kills wandering millipedes fast and removes the conditions that let them survive.

Frequently Asked Questions

How much does millipede treatment cost in Bellingham?

There is no one-size price because it depends on your home size, how severe the migration is, and how much sealing or harborage work is needed. We give a free, no-obligation quote after inspecting your property, and we never require a long-term contract.

Are millipedes harmful to people or pets?

No. Millipedes do not bite or sting and cause no structural damage. Their defensive secretion can irritate skin or a pet nose if handled, so it is best to sweep or vacuum them rather than touch them, but they pose no real health threat.

Why are millipedes suddenly all over my house?

Mass millipede movement is almost always triggered by weather. When Whatcom County soil becomes waterlogged in spring and fall, or dries out suddenly, large numbers leave the ground and head for your foundation, slipping in through the smallest gaps.

Do I need to worry about millipedes damaging my garden or home?

Millipedes feed on decaying plant matter and are actually beneficial in soil, only occasionally nibbling tender seedlings. They do not chew wood, wiring, or fabric, so the problem is purely a nuisance of numbers rather than any real damage.

How do I keep millipedes out for good?

Lasting control combines an exterior barrier treatment with moisture reduction and sealing entry points. Because migrations follow rain, ongoing perimeter service is the most reliable approach, and our 100% guarantee means we return between visits if they push back in.