Mail-in soil test kit for parents

You can't protect your kids from what you can't see.

About 1 in 4 American yards holds more lead than the EPA's screening level for a home.1,2 Dig one sample, mail it back free, and find out what's in yours.

Test My Land See a Sample Report

Private and confidential·Free shipping both ways·Our own U.S. lab·Refund policy

WHY UNDR

No expert required. Ten minutes, your own mailbox, nobody on your property.

No reading without a next step. What each number means, and what comes next if one stands out.

Detect harmful toxins. Ten heavy metals, lead and arsenic included.

Private and confidential. We never sell your results.

Be the parent who checked. The one box the home inspection skipped.

A report you’ll want to share. Plain English, your land’s type, real comparisons.

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    Confidential

Toxins have been building up for a hundred years.

The causes stopped. What they left in the soil didn't go anywhere.

  1. 1890s

    Lead-arsenate pesticide starts going on orchards. It keeps going for seventy years, onto land that's subdivisions now.5

  2. 1978

    Lead paint is banned for houses. It stays on the 34.6 million that already have it.3

  3. 1996

    Leaded gasoline is banned for cars, after seventy years of it settling along every road.4

  4. 2003

    Arsenic-treated lumber is phased out. Nobody has to pull up the decks and play sets already built.6

  5. Today

    None of it breaks down. It's still in the top few inches of the yard, which is where the kids are.7

Lead

What it does

The CDC says no safe level of lead in a child has been found. Even low levels lower IQ, attention and school performance,9 and the damage doesn't reverse.10

Arsenic

What it does

A known human carcinogen.11 It sits in the green-tinted lumber under old decks and play sets, and in the soil under those.6

Mercury, cadmium, chromium

What they do

A child's nervous system is more sensitive to mercury than an adult's.12 Cadmium builds up in the kidneys over years.13 Chromium-6 causes cancer.14

The Health & Safety Kit screens one sample for all of it, ten heavy metals and 44 other elements, and tells you in plain English what came back and where it usually comes from.

Test My Land

This isn't rare, and it isn't somewhere else.

1 in 4

American yards over the EPA's lead screening level. About 29 million households.1

34.6M

U.S. homes that still have lead paint on them.3

200 ppm

The EPA's lead screening level for a yard. Cut in half from 400 in January 2024.2

100 mg

The soil and dust a child between one and six swallows in a typical day, by the EPA's estimate. More if they're a dirt-eater.15

The EPA cut its number in half two years ago, which means a yard that was fine on paper in 2023 might not be now, and nobody tests a yard against that number when a house changes hands. It isn't in the inspection16 and it isn't in the disclosure.17

"I'm so careful about what my kids eat. I have no idea what's in the land where they play."

That's the question the Health & Safety Kit was built to answer. One sample from the yard, our own lab, and a report you can read in one sitting.

You had the house inspected. Nobody looked at the land.

Your home inspection covered
  • The roof
  • The wiring
  • The water heater
  • The crawlspace
  • The soil your kids play inNot required16

The seller had to tell you about lead paint on the house. Nobody had to say a word about lead in the yard.17

So the one place your kids spend the most time outside is the one place it was never anybody's job to check. Hands go in the dirt and then in mouths.18 The dog digs in it and brings it to the couch.19 The carrots come out of it.20

Another year goes by, and you still don't know.

Or you spend ten minutes with a shovel this weekend, and the lab does the rest.

Test My Land
A hand using the small UNDR shovel to fill a soil pouch from a bare patch of ground
Ten minutes, one pouch
The part nobody warns you about

The scary part is not knowing. The rest is kind of fun.

The worry is what gets a parent to this page. What shows up at the door is a well-made box, a Saturday in the yard, and a report about your own land that you'll read twice.

The UNDR kit box, front and back, reading Understand Your Land and Unearth Curiosity
What shows upA box you'd keep. It fits in a mailbox and everything is already inside.
The open UNDR Health and Safety Kit: small shovel, gloves, sample pouch and the instruction card
Open it upA steel shovel with a wood handle, gloves, the sample pouch and a card that shows you where to dig.
Hands scanning the QR code on the UNDR prepaid mailer with a phone
Scan, seal, mailThe QR code registers your kit in about ten seconds. Postage is already on the envelope.

Digging takes about ten minutes, gloves on. You seal the pouch, drop it in your own mailbox, and wait for the email.

The report doesn't read like a lab printout. Every element gets its own page: what it is, how it usually gets into a yard, and a short clip.

Each reading sits against common soil ranges, so you can see where yours lands. The heavy metals get their own scales, in plain English.

It's the same box, the same shovel and the same lab as our Treasure Hunting Kit. This one screens for the ten things a parent would want to know about.

★★★★★

"As a former science teacher, I absolutely loved seeing the report showing all of the different elements and minerals in my soil. The short clips about the different elements are especially educational and engaging."

Valerie, Health & Safety Kit, verified buyer
Test My Land

Dig. Mail. Find out.

  • 1. Dig

    A small shovel and a card telling you how. Ten minutes. Gloves are in the box.

  • Mail-in soil sample kit with envelope and test vials for home land testing

    2. Mail

    Seal the pouch, and drop it in the prepaid envelope.

  • 3. Find out

    Receive your report and analysis in your UNDR account portal.
What the kit screens for

Ten heavy metals. One sample.

The five you've heard of and the five you haven't, each on its own scale in the report, with the common range marked so you can see where your reading sits.

Lead

Old paint, seventy years of leaded exhaust, old industry.8

Arsenic

Treated lumber, orchard sprays, and in some places the rock itself.11

Mercury

Coal smoke and industry. Harder on a child's nervous system than an adult's.12

Cadmium

Mining, industry, coal, and some mineral fertilizers.13

Chromium

Plating, tanneries, some kinds of rock. The six form causes cancer.14

Uranium

Naturally in some rock and soil, and around old mining ground.

Thallium

Coal burning and smelters. Rare, and worth knowing about.

Antimony

Flame retardants, batteries, old ammunition.

Tellurium

Metal refining and some alloys. Rare in a yard.

Thorium

Naturally in some rock and sand. Old lantern mantles and welding rods.

Plus 44 standard elements

Oxygen to zirconium. What your land is actually made of, on the same report.

Every number shows its math

Each reading comes with its own detection limit and margin of error. Charts you can read without a chemistry degree.

Know who to call

If something comes back elevated, the report says what kind of professional handles it and what to ask them.

Test My Land
The report

What comes back.

Not a lab printout. A report that walks through your sample element by element, in plain English, and shows its work. The readings below are from real ones.

An UNDR report open on a laptop, showing the heavy metals page with each metal on its own scale
The heavy metals page
The first page of an UNDR report on a laptop, greeting the customer by name and summarizing what was found in the sample
Page one, addressed to you
From a real Health & Safety report
82Pb
Lead
65 ppm, margin of error ± 5.7 ppm, on the report's 450 ppm scale
65 ppm
Common range to 80 Elevated 80 to 400 Above 400 ppm
What the report saidLead is 3.7 times higher than commonly found in soil samples. Under the common-range line the report draws at 80 ppm, and under the EPA's 200 ppm screening level for a yard.2 Typical U.S. soil carries about 18 ppm.21
From the sample Health & Safety Plus report
33As
Arsenic
12 ppm, measured against a 35 ppm scale
12 ppm
Common 0 to 10 Slightly above 10 to 20 Elevated 20 to 35 ppm
What the report said"Arsenic came in over the common range line but under the elevated line, which is more than most soil carries but close to what natural rock holds, so it isn't a rush, though people on a well often get the water checked. Some rock runs this high naturally, and old orchard sprays or treated lumber are the other usual reasons."

Every number in a report shows its detection limit and margin of error. These are screening results on the samples sent to us, not assessments of a property.

See the Full Sample Report

The whole thing: a page for every element found, the heavy metals on their own scales, and who to call if one is elevated.

We're Carson and Mari. Our daughter Isabella puts everything in her mouth.

We wanted to know what was in the land she plays on. Finding out took either a lot of money, a job in the industry, or the patience to work through forms nobody wrote with a parent in mind.

So we built the lab. Every sample is analyzed here in the United States, by us, on the same instrument with the same protocol. A person reads every report before it goes out.

Carson is a veteran with a Master's from Harvard University and a B.S. from the U.S. Air Force Academy. Mari has a J.D. from Harvard University and a B.A. from Tufts.

Tested in our own U.S. labEvery report reviewed before it's sentHarvard-educated foundersVeteran-ownedBacked by scientific advisors
Carson and Mari, founders of UNDR

Customers are saying

4.92 ★ (13)
Verified

"What if it comes back high?"

Then you'll know, which is the whole point. An elevated number has a name, a usual source, and a phone number to call. And the usual fixes are ordinary.

Straight off the EPA's own list18,7
Cover the bare patches
Raise the garden beds
Shoes off at the door
Wash the hands that were in the dirt

A number you never looked up gets none of that. It just stays in the yard, and so do the kids.

"Very cool to see what's in my soil. It's reassuring to know there are no heavy metals or toxins."Matthew, verified buyer

Be the parent who checked.

Ten minutes in the yard this weekend. Here's what actually changes.

Right now
  • Nobody has ever tested that soil.
  • You have no way to find out.
  • It stays that way another year.
About a week from now
  • You know what's in it, element by element.
  • You know whether anything is elevated.
  • You know who to call if it is.
"Super cool company, loved being able to find out if I had any precious metals in my yard! Also knowing my children are safe to play in the yard is amazing feeling. 10/10 would recommend."Jared, UNDR Premium, verified buyer
Test My Land

Pick your kit.

For the yard where the kids play

Health & Safety $149

Ten heavy metals + 44 standard elements. Free shipping both ways. One sample.

Test My Land
For the yard with an oil history

Health & Safety Plus $199

Everything in Health & Safety + 12 petroleum contaminants: gasoline, diesel, heating oil, motor oil, benzene, DDT and more. Up to two samples.

Test My Land
The full panel

UNDR Premium $299

Everything in Plus + precious metals and rare earth elements. More than 90 things screened. Up to two samples.

Test My Land

Free shipping both ways·30-day returns on unopened kits·Analyzed in our own U.S. lab

Three things we promise.

UNDR willAnalyze your sample in our own U.S. lab. Never a third party.
UNDR willHave a person review your report before it reaches you.
UNDR will neverSell your results.

FREQUENTLY ASKED QUESTIONS

Which spot should I test?

The place your kids use most. Bare patches over grass. The strip along the house and the strip along the road are where lead tends to collect. You can always test another spot.

What about the vegetable garden?

Test it. Root crops and leafy greens take up lead and arsenic far more than tomatoes and peppers do, and soil clings to both.

What about the dog?

Dogs dig, chew and groom, and young animals absorb up to half the lead they swallow. Whatever's in the yard comes inside on their feet.

How accurate are the results?

Very, and we show you the math. This isn't a color-changing test strip. Your sample is prepared and run on commercial lab-grade instruments using industry-recognized analytical methods, and every result comes with its own detection limit and margin of error.

When will I get my results?

Within 3 to 5 days of your sample reaching the lab, often sooner. We post your report to your UNDR account and email you the moment it's ready.

What happens to my information?

We never sell your results.

Do you test for oil and petroleum?

On the Health & Safety Plus kit and UNDR Premium. Gasoline, diesel, heating oil, motor oil, waste oil, benzene, DDT and more.

The land where your kids play shouldn't be a question mark.

One sample from the yard, run in our own lab, and a report you can read.

Test My Land

Where the numbers on this page come from

Every figure above is drawn from a public agency or a peer-reviewed study. The small numbers next to each claim point here.

  1. About one in four U.S. yards over 200 ppm lead; ~29 million households. Filippelli et al., Indiana University, 15,595 residential samples, reported by the American Geophysical Union. news.agu.org
  2. EPA residential soil lead screening level lowered from 400 to 200 ppm, January 2024. U.S. EPA, Office of Land and Emergency Management. epa.gov
  3. Lead paint banned for residential use in 1978; 34.6 million U.S. homes still contain it. U.S. EPA, citing HUD's American Healthy Homes Survey II. epa.gov
  4. Sale of leaded gasoline for on-road vehicles banned effective January 1, 1996. U.S. EPA. epa.gov
  5. Lead arsenate pesticide used on orchards from the 1890s to the 1960s; lead and arsenic remain in the soil long after. Wisconsin Department of Agriculture, Trade and Consumer Protection. datcp.wi.gov
  6. Arsenic-treated (CCA) wood phased out for residential use in December 2003; existing structures and surrounding soil not required to be removed. U.S. EPA. epa.gov
  7. Lead does not break down or disappear from the environment over time; children exposed through hands and objects in mouths; wash hands after playing outside. U.S. EPA, Learn About Lead. epa.gov
  8. Lead in yard soil from exterior paint near building perimeters, leaded-gasoline emissions near roadways, and industrial sites. U.S. EPA, Lead in Soil. epa.gov
  9. "No safe level of lead in children has been identified. Even low levels of lead in blood have been shown to reduce children's IQ, ability to pay attention, and academic achievement." U.S. CDC. cdc.gov
  10. Lead "can permanently affect children's brain development." World Health Organization. who.int
  11. Inorganic arsenic is a known human carcinogen; soil arsenic varies widely, 1 to 40 ppm. Agency for Toxic Substances and Disease Registry. atsdr.cdc.gov
  12. Children are more sensitive to mercury than adults because their nervous systems are still developing. ATSDR. atsdr.cdc.gov
  13. Cadmium enters soil from mining, industry, burning coal, and mineral fertilizers; long-term exposure builds up in the kidneys. ATSDR. atsdr.cdc.gov
  14. Chromium(VI) compounds are carcinogenic to humans. ATSDR, citing the International Agency for Research on Cancer. cdc.gov
  15. Children aged 1 to 6 ingest about 100 mg of soil and dust per day (central estimate); soil-pica behavior up to 1,000 mg per day. U.S. EPA, Exposure Factors Handbook, Chapter 5. epa.gov
  16. Home inspectors are not required to determine the presence of contaminants in soil. American Society of Home Inspectors, Standard of Practice, §15.2. homeinspector.org
  17. Federal real-estate lead disclosure covers lead-based paint and paint hazards in the home. U.S. EPA. epa.gov
  18. Exposure through playing in bare soil, hands to mouths, and produce grown in contaminated soil; steps to reduce exposure include covering bare soil, raised beds with clean soil, doormats and removing shoes, and washing hands. U.S. EPA Region 3, Lead in Soil. epa.gov
  19. Young animals absorb up to 50% of ingested lead; dogs and cats raise their risk by chewing, digging, and grooming. American Veterinary Medical Association. avma.org
  20. Lead uptake: carrot ≥ lettuce > bean > tomato; arsenic uptake: lettuce > carrot > bean > tomato. Cornell Waste Management Institute (McBride); see also University of Maryland Extension, Lead in Garden Soils. cornell.edu · extension.umd.edu
  21. Median lead in U.S. surface soil about 18 ppm. U.S. Geological Survey, Scientific Investigations Report 2017-5118. usgs.gov

UNDR provides an informational analysis of your specific soil sample only. Results are educational and do not constitute professional geological, environmental, legal, health, or safety advice. Results apply solely to the specific sample submitted and do not represent broader property or subsurface conditions.

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