Test your water for microplastics. At-home. In 15 minutes.
The world’s first at-home microplastics kit. Test your tap, your filter, bottled water, even your tea. Particles glow bright pink under the blue light. You upload the photos, we count them.
2 tests per kit · results in 15 minutes
We make the invisible visible.
Your tap looks clean. Bottled water looks clean. Your filter looks like it is working. Looking tells you nothing. The test gives you a real particle count.
The kit counts microplastics — the particles big enough to catch on a filter. The nanoplastics travel with them: smaller, invisible, and roughly 90% of the plastic in bottled water. A high count is your signal that both are there.
Some filters work. Some do not. You cannot tell by looking.
Real tests · Los Angeles
Own a Berkey, ZeroWater, Brita, or RO system? Find out if it actually removes microplastics.
Pick two things to test
Your tap and your filter. Bottled water and tap. Tea, formula, your gym bottle. Whatever you are curious about.
Run the kit
Add the stain, push the water through the filter, shine the blue light.
Upload the photos
Pink dots are plastic particles. We count them and send your result.
“New baby, kept stressing about making formula with tap water. Tested the tap and our Brita. The Brita came back a lot cleaner, so that is what we use now.”
“Had an under-sink filter for years and just trusted it. Tested the tap and filtered side. Filtered came back way cleaner. Good to know.”
“Tested our tap next to the bottled water we buy by the case. Figured the bottled would be cleaner. It was not.”
“Our tap came back basically clean. Hardly any pink dots. I was expecting the opposite.”
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See what we are finding each week.
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Everything on microplastics and nanoplastics, in one place.
The microplastics test kit
How the at-home kit works, what it detects, and what it costs.
At-home vs. lab testing
Cost, speed, and accuracy — and when a $600 lab is actually worth it.
Filters & bottled water, tested
Does your filter remove microplastics? What's in Fiji, Dasani, Aquafina?
Microplastics in the body
What research shows about microplastics in blood, urine, and stool.
Nanoplastics vs microplastics
The smaller half you can't see — ~90% of bottled-water particles, and why size changes everything.
How to test your water
The step-by-step at-home method, start to finish.
Field tests & experiments
Tea bags, baby formula, LA tap water — everything we've run.
Common questions
What does the kit test?
It shows plastic-like particles caught on a filter. Pink dots are counted from the photos you upload.
Can I test my filter?
Yes. Test your tap, then test the filtered water, and compare the microplastic counts.
What if I do not have a filter yet?
Test your tap first. If you install a filter later, you will have a real before-and-after.
Does it detect nanoplastics?
No. The kit counts microplastics down to ~1 micron. Nanoplastics are smaller than any optical method can see and need lab instruments. But they travel with microplastics, so a high count flags both.
Is it hard to run?
No. If you can fill a glass and follow instructions, you can run it. About 15 minutes, start to finish.
More questions? See the full FAQ or read how it works.