Water Bugs: How to Get Rid of Them and Keep Them Out
Big dark bugs coming up the floor drain, running across the basement at night or showing up by the tub? Silver Bullet Pest Control finds out what the "water bug" really is, treats where it lives, and helps you fix the moisture and the gaps that keep bringing it back.
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Not sure if it's a water bug or a roach? Text us a photo and we'll tell you.
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How do you get rid of water bugs and keep them out?
To get rid of water bugs, dry up the standing water and moisture they live on, seal the gaps and drains they use to get in, keep damp areas clean, and call a professional when you keep seeing them. Call Silver Bullet Pest Control at 973-510-2585, a licensed New Jersey exterminator (NJ License 90568B). Most big "water bugs" found inside New Jersey homes turn out to be cockroaches, while true giant water bugs live in ponds and streams, so we identify the insect before we treat. We inspect drains, basements and other wet spots, treat the source and give you prevention tips. Same-day visits are often available, and we speak Spanish.
Why New Jersey homes get water bugs
"Water bug" is a name people use for any big, dark bug that shows up near water. In a house it almost always means a damp spot and a way in. Here are three common situations.
Bugs coming up the drains
- Large dark bugs near floor, sink or tub drains
- Most active at night when the lights are off
- Shed skins or egg cases near the drain
Drains connect your house to wet, dark pipes. Bugs that live there come up when the trap dries out or the drain cover is loose. We treat the source and show you how to keep drains from being an open door.
Bugs in a wet basement or crawlspace
- Bugs around the sump pit, water heater or laundry
- Musty smell and damp walls or floors
- Bugs under boxes and clutter on the floor
Leaks, condensation and standing water make basements the favorite spot. Fixing the moisture matters as much as the treatment, so we point out the wet areas and the cracks and gaps they use.
Bugs in the kitchen or bathroom
- Bugs under the sink or behind the toilet
- Activity near leaking pipes or a dripping faucet
- Droppings or egg cases in cabinets
Under-sink cabinets and bathrooms have water, warmth and hiding spots. We inspect behind and under fixtures, treat the cracks they hide in and tell you which leaks to fix.
Water bug or cockroach? How to tell
Giant water bugs are often mistaken for cockroaches, and many big "water bugs" found indoors really are roaches. What you have decides how it gets treated.
| Insect | What it looks like | Where you find it | What it means |
|---|---|---|---|
| Giant water bug | Flat, oval, brown body with thick, grabbing front legs | Ponds, streams and pools; sometimes drawn to outdoor lights | An outdoor insect that wandered in; it does not live in your house |
| American cockroach | Large, reddish-brown, with wings | Basements, floor drains, boiler rooms and sewers | Can live and breed indoors where it is damp |
| Oriental cockroach | Shiny black or very dark brown, slow-moving | Damp basements, crawlspaces and drains | Points to a moisture problem in the lower part of the house |
Don't pick one up. Giant water bugs can bite if handled. Take a photo from a safe distance and text it to us at 973-510-2585.
Water bug, roach and pest services
What a water bug visit looks like
Inspect
We check drains, basements, laundry areas, under sinks and anywhere with leaks or standing water.
Identify
We confirm whether it's a giant water bug, an American cockroach or an Oriental cockroach, and find where it lives.
Treat
We treat the hiding spots and the source, using products and placements chosen to keep your family and pets safe.
Prevent
We show you which leaks, drains and gaps to fix, and follow up so they don't come back.
Water bugs through the year
Spring
Rain and melting snow raise moisture in basements, and bugs start moving up from drains and crawlspaces.
Summer
The busiest time. Warm, humid nights bring big bugs inside, and giant water bugs fly to outdoor lights.
Fall
As it cools off outside, bugs look for warm, damp spots indoors, like basements and boiler rooms.
Winter
Roaches stay active in heated basements and around pipes. A good time to fix leaks and seal gaps.
Landlords, restaurants & property managers
Basements, trash rooms and floor drains in multi-unit buildings and restaurants are where these bugs build up. We inspect common areas and units and set up a plan. See commercial pest control.
What does water bug treatment cost?
It depends on what the insect is, how many areas are affected, the size of the home and whether there's a moisture problem to fix. We give a free quote and tell you the price before any work starts. See how much an exterminator costs in NJ.
Get a free water bug quote
Tell us what you're seeing and where. We'll get back to you fast, usually the same business day.
Call us for
- Big bugs coming up a drain
- Bugs in a damp basement
- Bugs under the kitchen or bathroom sink
- Not sure if it's a roach or a water bug
- Bugs in a rental or apartment building
- Bugs in a restaurant or business
Request Service
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Water Bug Questions
Where do water bugs hide in a house?
In damp places: floor drains, sink and tub drains, basements, laundry areas, under sinks and anywhere with leaks or standing water.
What are the signs of a water bug problem?
Live bugs, especially at night, cast-off skins, droppings and egg cases (small brown capsules) near damp areas. Seeing them again and again in the same spot means they are living close by.
Are giant water bugs the same as cockroaches?
No. Giant water bugs are predatory insects that live in ponds and streams, but they are often mistaken for cockroaches. Many big "water bugs" found indoors are actually American or Oriental cockroaches. An inspection confirms which one you have.
Do home remedies keep water bugs away?
Keeping areas dry and clean helps the most. Citrus oils, vinegar and essential oils may deter them a little, but they will not fix a moisture or entry problem.
What is the life cycle of a water bug?
Both true water bugs and cockroaches go through incomplete metamorphosis: egg, nymph and adult, with nymphs that look like smaller versions of the adults. Giant water bugs lay their eggs in or near water outdoors. Cockroaches lay eggs inside a small capsule (egg case) hidden in dark, sheltered spots indoors.
¿Hablan español?
Sí, hablamos español. Eliminamos "water bugs" y cucarachas grandes en casas y negocios de Nueva Jersey. Llame o mande texto al 973-510-2585.
Water bug service across North Jersey
Based in Garfield, we handle water bugs and roaches in Bergen, Passaic, Essex, Hudson, Union and Morris counties.
Updated October 2026 by the Silver Bullet Pest Control team, Garfield, NJ • NJ License 90568B