How does an at-home test kit work?

You collect a sample at home following the included steps, mail it back with the prepaid label, and a certified lab analyzes it. Your results appear in your Nestwell dashboard, explained in plain language.

Which kit size should I start with?

If you are not sure, get your free home score first. It looks at your address and a few questions, then recommends the kits that matter most for your home. Water is the most common starting point. All kit orders come with a Free Home Health Score & Report.

What do the results tell me?

Results describe what the lab measured in your water, air, or dust, compared against published guidance such as EPA limits. They screen your home environment and are not a medical diagnosis.

What happens after I get results?

Nestwell matches your results to specific fixes or makes recommendations on additional, specialized testing; such as the right water filter or air purifier, so you are not left guessing what to do next.

Drinking Water, Surface and Mold & Fungus lab test kit boxes stacked on a kitchen counter, with the collection tools shown below

Water53 markers
Mold55 markers
Lead Dust1 marker

9Samples

109Lab markers

11 daysUntil results

Starter Kit

Discover your home baseline

STARTING AT$251.74

Test your water and household surfaces for 100+ lead, mold, fungus and water-quality markers that may matter to your health or your next renovation project.

Pick your kit size:

Best fit for your home size · 30% savings
Large$451$315.70
Rec. for homes over 1,000 sq ft
What’s included
- 4 Lead Dust Surface Tests
- 4 Mold & Fungus Surface Tests
- Drinking Water Test: Level 1 + Bacteria
- 1 Year FREE Nestwell Membership
Small$307$251.74
Rec. for homes under 1,000 sq ft
What’s included
- 1 Lead Dust Surface Test
- 1 Mold & Fungus Surface Test
- Drinking Water Test: Level 1 + Bacteria
- 1 Year FREE Nestwell Membership

30-day money-back guaranteeFree 2-day shipping

All orders include 1-YR FREE Nestwell Membership ($199 value)

What’s included

Personalized action plan
Full contaminant details for your address
Nearby hazard mapping
Up to 15% off future test kits
Up to 20% off marketplace products
Cancel anytime

Per-location results
Scored against EPA + CDC standards
HSA/FSA eligible via TrueMed
Accredited lab network
Regulatory analytical methods

Designed to understand your whole house

Our Nestwell Starter Bundle. Mold and lead can be found all around your house, and a single swab answers for a single square foot. Sampling four separate places for each is what turns a handful of readings into a picture of the house you actually live in.

Accredited labs, regulatory methods
Every sample is analyzed by an accredited environmental lab with the same methods regulatory testing uses.
Numbers with regulatory context
Results come back as a measured value next to the standard it is judged against, not just a "detected".
One box, no home visit
Everything arrives at once and we tell you both where and how to sample, no outside home inspection needed.

How Nestwell testing works

How collection works

Understand the science →

Collect
Take a quick sample from your kitchen tap, swab damp spots that look like they may have mold and wipe the dusty areas around your home. No tools, and no unstable samples that must be sent back the same day.
Mail
Everything goes back in the same box with the prepaid return label. No appointment, nobody in your house, and easy to send back when convenient for you.
Read
Results land in your Nestwell dashboard as they clear the lab, each scored against the standard that applies to it.

Filling a sample bottle at a kitchen tap

Mold & Fungus

Four tape lifts for four surfaces. 55 measurements across mold specifics, identifying what’s actually growing rather than confirming that something is.

55 measurements

Supports concern around

Allergies, asthma, coughing and wheezing, sinus and nasal irritation, respiratory irritation, eye irritation, skin irritation, sensitivity to damp indoor environments, immune-compromised household members, and symptoms associated with suspected mold exposure.

Water

One sample from the kitchen tap. Lead, copper, arsenic, nitrate, hardness, coliform and more; the standard signals that something is getting in that shouldn’t. Built for city water or private wells.

53 measurements

Supports concern around

Heavy metal exposure, lead exposure, bacterial contamination, gastrointestinal illness, infant and child development, pregnancy and reproductive health, kidney health, liver health, neurological health, nitrate exposure, mineral imbalance, and long-term contaminant exposure.

Lead Dust

Four wipes for windowsills, floors, or door frames. Lead doesn’t just come from paint that was standard before 1978, but can also be tracked in by us or our pets from outside.

1 measurement

Supports concern around

Lead in settled surface dust.

9 samples, and exactly where each one goes.

Mold and lead dust collect all throughout your home, so a single sample can come back clean in a home with a real problem twenty feet away. We walk you through these 9 spots in order.

Water×1
Mold×4
Dust×4

Kitchen tapWater · 1 of 9

A first-draw sample from the faucet you actually drink from, which is where lead and copper from your own pipes show up.

Kitchen

Hallway

Bathroom

Living Room

Bedroom

Basement

Foyer

Playroom

Why Nestwell?

Capability	Nestwell	Hardware store strips	In-person inspector
9 samples from across your home	Included	Not included	Included
Real exposure concentrations	Included	Not included	Sometimes
Accredited lab, regulatory methods	Included	Not included	Sometimes
Results in days, not weeks	Included	Included	Not included
Results tracked over time	Included	Not included	Not included

Included
Sometimes
Not included

A number is only useful next to its limit.

At Nestwell, we provide science backed ranges for all the exposures in your home, allowing for personalized suggestions of in home remediation.

Accredited labs only
Samples are analysed by accredited environmental laboratories using the analytical methods used for regulatory compliance work: the same reading a professional consultant would order.
Each result has a standard
A number on its own is not an answer. The EPA action level for lead in water is 15 ppb; the CDC states there is no safe level of lead exposure for children. Each finding is shown against the limit that applies to it.
Where there is no limit, we say so
The EPA sets no numeric limit for mold, and moisture control is the real remedy. Mold results are reported as what is growing and at what relative level, never as just a pass or a fail.

In partnership with experts who study this for a living

Dr. Malathi Srinivasan
Stanford University
Clinical Professor of Medicine, Primary Care and Population Health
“Our physical and home environment is a direct determinant of our health. Small environmental changes make a big difference, especially in early childhood development and for vulnerable adults.”
Dr. Mark Cullen
Stanford University of Medicine
Former Senior Associate Dean for Research; Founding Director, Stanford Center for Population Sciences
“After four decades studying the health effects of environmental exposures, I consider a safe living environment paramount to long-term health and well-being.”
Dr. Lauren Eggert
University of California, San Francisco
Associate Professor of Medicine, Pulmonary, Critical Care, Allergy, and Sleep Medicine
“As a lung doctor, I see air pollution, both indoor and outdoor, as one of the greatest threats to respiratory health.”
Dr. Matthew Trowbridge
Founder, Health Intent Partners
Physician and Built-Environment Health Expert; Former Chief Medical Officer, International WELL Building Institute
“Most of my career has been spent defining what makes a building healthy. A home is a system, and how it is designed and built shapes your health as much as anything you bring into it.”