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Your home is
making you sick.*

*Probably.

Stasis tests your water, watches the air and light around your home every day, and tells you exactly what to fix. Start with a free score for your address.

Your free score starts with public records for your address: your water system's test results, the nearest air monitors and your daylight.

Example free score: 49, Poor. Air poor, water fair, light good.
Stasis air screen showing the air forecast and smog.
Stasis water screen showing the path from utility to tap.
Stasis light screen showing the best morning daylight window.
20 million

Americans drink from water systems averaging above the federal limit for PFOA, a forever chemical known to cause cancer.

Utility results for 666 water systems reporting PFOA
56%

of US homes were built before 1986, when lead solder was still legal in household plumbing.

US Census Bureau, American Community Survey 2024: 82 million of 146.7 million homes
1 in 3

Americans drink from water systems averaging above the chlorine byproduct level linked to bladder cancer.

105 million of 341.8 million US residents; utility results for 38,332 water systems

Test the water that comes out of your tap.

Your utility reports an average. Stasis tests your tap.

  1. Order in the app
  2. A kit ships to your home
  3. Fill the vials at your tap
  4. Mail it back, and an accredited lab tests it
  5. See what's in your water, read against the health research
  6. See which fixes matter, in order
Tap waterForever chemicalsMold+ More

A full suite of home tests, ordered in the app. Members save 20%.

Stasis tap results screen showing water test results.

The water you drink. The air you breathe. The light you live by.

Water

What’s in your tap ends up in you.

Air

Bad air finds its way inside.

Light

Light runs your body clock.

More data than anyone could read by hand.

Stasis gathers the public record on your water and air, matches it to your address, and holds every line to the health research.

44,657public water systems mapped across the US

We find who provides the water to your house.

1.97 millionwater test results

Every result your water system has reported, checked against the health research, not just the legal limit.

Close to 7,000real air monitors, not a modeled guess

Most apps estimate your air from a model grid miles wide. Stasis finds the real monitors closest to your home and reads them every hour.

Air monitor, 2.4 miles away, read this hour
Monitor 0.8 miles away · read 4 min ago
Monitor 3.1 miles away · read 11 min ago
Your homenot just your zip code

The details that change what's in your home's water and air.

Year built
Older pipes and fixtures can add lead to your water.
Radon zone
Your county's risk of radon, a radioactive gas from the ground.
Flood zone
Whether flooding, and the mold that follows, is likely where you live.
Nearby industry
Factories and rail lines that can pollute the air around you.
Smoke
How often wildfire smoke reaches your address.
Daylight
When the sun rises and sets for your home, all year.
350+peer-reviewed studies, and counting

Behind every health line in the app.

  • Drinking water trihalomethanes and cancer risk: a meta-analysisHelte et al., 2025 · Environmental Health Perspectives
  • Disinfection byproducts and bladder cancer: a meta-analysisXie et al., 2025 · Journal of Hazardous Materials
  • Long-term PM2.5 exposure and dementia: a burden-of-proof reviewHuang et al., 2025 · Nature Aging
  • Home point-of-use filters can monitor multiple metals in tap waterWang et al., 2025 · Environmental Science & Technology
  • Household faucet filters for lead removal: field performancePurchase et al., 2025 · ACS ES&T Water
  • Pitcher and bottle filters and PFAS removal from drinking waterZarebska et al., 2025 · Science of the Total Environment
  • Light exposure and aspects of cognitive function in everyday lifeDidikoglu et al., 2025 · Communications Psychology
  • Damp and mold-affected housing and mental health: a reviewGatto et al., 2024 · Environmental Health Perspectives
  • Microplastics and nanoplastics in atheromas and cardiovascular eventsMarfella et al., 2024 · New England Journal of Medicine
  • Lifetime excess lung cancer risk from radon: pooled miner cohortsKreuzer et al., 2024 · Radiation and Environmental Biophysics
  • Portable air cleaners in field studies: a meta-analysisEbrahimifakhar et al., 2024 · Science of the Total Environment
  • Outdoor interventions for myopia in children: a meta-analysisMei et al., 2024 · Frontiers in Public Health
  • Increased bedroom ventilation and sleep: a field interventionFan et al., 2023 · Science of the Total Environment
  • Performance of NSF/ANSI 53 certified water filters for leadTang et al., 2023 · Water Research
  • National survey of lead and other metals in home drinking waterBradham et al., 2023 · Journal of Exposure Science & Environmental Epidemiology
  • Gas stoves and childhood asthma: population attributable fractionGruenwald et al., 2023 · International Journal of Environmental Research and Public Health
  • Benzene emissions from gas and propane stove burners and ovensKashtan et al., 2023 · Environmental Science & Technology
  • PFAS exposure, pubertal onset and reproductive hormones in girlsPinney et al., 2023 · Environmental Health Perspectives
  • Daytime, evening and nighttime indoor light recommendationsBrown et al., 2022 · PLOS Biology
  • Light exposure during sleep impairs cardiometabolic functionMason et al., 2022 · PNAS
  • Methane and NOx emissions from gas stoves, cooktops and ovensLebel et al., 2022 · Environmental Science & Technology
  • Plastic particles in human bloodLeslie et al., 2022 · Environment International
  • PFAS adsorption onto activated carbons: a comparisonChow et al., 2022 · Water Research
  • Ion-exchange water softeners to prevent eczema: pilot trialJabbar-Lopez et al., 2022 · Clinical & Experimental Allergy
  • Domestic hard water and eczema in childrenLopez et al., 2022 · British Journal of Dermatology
  • Residential radon and lung cancer in never-smokers: meta-analysisCheng et al., 2021 · European Respiratory Review
  • Wildfire smoke harms respiratory health more than other PM2.5Aguilera et al., 2021 · Nature Communications
  • Wildfire smoke impacts on indoor air qualityLiang et al., 2021 · PNAS
  • Wildfire smoke events and indoor air qualityMay et al., 2021 · Aerosol and Air Quality Research
  • Water hardness and xerosis: a population studyHenning et al., 2021 · PLoS One
  • Plasticenta: microplastics in human placentaRagusa et al., 2021 · Environment International
  • Fluorinated compounds in North American cosmeticsWhitehead et al., 2021 · Environmental Science & Technology Letters
  • Revised action spectrum for vitamin D synthesis by UV in humansYoung et al., 2021 · PNAS
  • Home particulate air filtration and blood pressureWalzer et al., 2020 · Hypertension
  • Point-of-use residential water filters and PFAS removalHerkert et al., 2020 · Environmental Science & Technology Letters
  • Cumulative cancer risk from disinfection byproducts in tap waterEvans et al., 2020 · International Journal of Environmental Research and Public Health
  • Global burden of 87 risk factors, 1990 to 2019Murray et al., 2020 · Lancet
  • Water safety in California public schools after new lead policiesUmunna et al., 2020 · Preventing Chronic Disease
  • Radon interventions around the globe: a systematic reviewKhan et al., 2019 · Heliyon
  • Sensitivity and variability in the circadian response to evening lightPhillips et al., 2019 · PNAS
  • Low ambient humidity impairs airway barrier function and immunityKudo et al., 2019 · PNAS
  • Low-level arsenic in drinking water and cancer risk: a reviewBoffetta and Borron, 2019 · Dose-Response
  • Human consumption of microplasticsCox et al., 2019 · Environmental Science & Technology
  • Light at night during sleep and obesity in womenPark et al., 2019 · JAMA Internal Medicine
  • Bedroom light at night and depressive symptoms in older adultsObayashi et al., 2018 · American Journal of Epidemiology
  • Global mortality from long-term outdoor fine particle exposureBurnett et al., 2018 · PNAS
  • Walking in London streets: respiratory and heart responsesSinharay et al., 2018 · Lancet
  • Low-level lead exposure and mortality in US adultsLanphear et al., 2018 · Lancet Public Health
  • Nitrate in drinking water and colorectal cancer riskSchullehner et al., 2018 · International Journal of Cancer
  • Indoor air humidity, air quality and health: an overviewWolkoff, 2018 · International Journal of Hygiene and Environmental Health
  • Estimating the high-arsenic domestic-well population in the USAyotte et al., 2017 · Environmental Science & Technology
  • Childhood blood lead, adult cognition and socioeconomic statusReuben et al., 2017 · JAMA
  • Sun protection by beach umbrella versus SPF 100 sunscreenOu-Yang et al., 2017 · JAMA Dermatology
  • Long-term ozone exposure and mortality in a large prospective studyTurner et al., 2016 · American Journal of Respiratory and Critical Care Medicine
  • Bedroom air quality effects on sleep and next-day performanceStrom-Tejsen et al., 2016 · Indoor Air
  • Evening use of light-emitting eReaders affects sleep and alertnessChang et al., 2015 · PNAS
  • Remediating damp and mouldy buildings to reduce respiratory symptomsSauni et al., 2015 · Cochrane Database of Systematic Reviews
  • Outdoor class time and incident myopia in schoolchildrenHe et al., 2015 · JAMA
  • Nitrogen dioxide and mortality: meta-analysis of long-term studiesFaustini et al., 2014 · European Respiratory Journal
  • Indoor tanning and melanoma in adults: a meta-analysisColantonio et al., 2014 · Journal of the American Academy of Dermatology
  • High humidity leads to loss of infectious influenza virus in airNoti et al., 2013 · PLOS ONE
  • Indoor NO2, gas cooking and childhood asthma: meta-analysisLin et al., 2013 · International Journal of Epidemiology
  • Fine particles and mortality: Harvard Six Cities extended follow-upLepeule et al., 2012 · Environmental Health Perspectives
  • Is CO2 an indoor pollutant? Effects on decision-makingSatish et al., 2012 · Environmental Health Perspectives
  • Serum vaccine antibodies in children exposed to PFASGrandjean et al., 2012 · JAMA
  • Respiratory and allergic effects of dampness and mold in homesMendell et al., 2011 · Environmental Health Perspectives
  • Children's blood lead, lead service lines and water disinfectionBrown et al., 2011 · Environmental Research
  • Ion-exchange water softeners for childhood eczema: a randomized trialThomas et al., 2011 · PLoS Medicine
  • Room light before bedtime suppresses melatonin onsetGooley et al., 2011 · Journal of Clinical Endocrinology & Metabolism
  • Serum PFOA and thyroid disease in US adultsMelzer et al., 2010 · Environmental Health Perspectives
  • Decline in serum PFOA after granular activated carbon filtrationBartell et al., 2010 · Environmental Health Perspectives
  • Hexavalent chromium is carcinogenic to rats and mice in drinking waterStout et al., 2009 · Environmental Health Perspectives
  • Dampness and mold in the home and depressionShenassa et al., 2007 · American Journal of Public Health
  • Influenza transmission depends on humidity and temperatureLowen et al., 2007 · PLoS Pathogens
  • Short-wavelength sensitivity for the acute effects of lightLockley et al., 2006 · Sleep
  • Reduction in fine particles and mortality: Six Cities follow-upLaden et al., 2006 · American Journal of Respiratory and Critical Care Medicine
  • Indoor drinking water handling and trihalomethane levelsLevesque et al., 2006 · Water Research
  • Effect of boiling water on disinfection by-product exposureKrasner and Wright, 2005 · Water Research
  • Breath trihalomethane changes from household water-use activitiesGordon et al., 2005 · Environmental Health Perspectives
  • Radon in homes and lung cancer: 13 European case-control studiesDarby et al., 2005 · BMJ
  • Residential radon and lung cancer: 7 North American studiesKrewski et al., 2005 · Epidemiology
  • Low-level lead exposure and children's IQ: pooled analysisLanphear et al., 2005 · Environmental Health Perspectives
  • Infant methemoglobinemia and dietary nitrate in food and waterGreer and Shannon, 2005 · Pediatrics
  • Water arsenic exposure and children's intellectual functionWasserman et al., 2004 · Environmental Health Perspectives
  • Lung cancer and residential radon in China: pooled resultsLubin et al., 2004 · International Journal of Cancer
  • Dehumidification to control house dust mites: a randomized trialHyndman et al., 2000 · Clinical & Experimental Allergy
  • Ozone in indoor environments: concentration and chemistryWeschler, 2000 · Indoor Air
  • Chloroform and trichloroethylene exposure routes in tap waterWeisel and Jo, 1996 · Environmental Health Perspectives

What's worth fixing in your home. What's hype.

Stasis reads your results against the health research and tells you what to buy, what to skip and what to do first, for your home and your family.

Example homeBuilt 1978Two kids under 6Tap test: lead and PFAS
WaterWorth it

An under-sink filter certified for lead

BecauseLead found at your kitchen tap, and two kids under 6.

There is no safe level of lead for a child. Certified filters cut lead in nearly every real home studied.

First in your plan
WaterSkip it

Whole-house carbon as your PFAS fix

BecausePFAS showed up in your tap.

In real homes, whole-house carbon was unreliable and sometimes made PFAS worse. Under-sink reverse osmosis removed over 94%.

Not in your plan
AirWorth it

A HEPA purifier in the kids' bedroom

BecauseWildfire smoke reached your area four times last season.

It pulls smoke particles out of the room they sleep in all night.

Second in your plan
AirSkip it

An air purifier that makes ozone

BecauseYou were about to buy one for the nursery.

Ozone is a lung irritant. You'd be adding the problem you're trying to remove.

Not in your plan
LightWorth it

Morning daylight, every day

BecauseYour kids are up at 6 and you can't fall asleep before 1.

Morning light pulls your body clock earlier. It costs nothing.

Daily, in Today
WaterSkip it

A water softener "for your health"

BecauseYour water is hard, and the salesman led with health.

Hard water is about scale, soap and spots. It isn't a health risk.

Not in your plan
WaterWorth it

Swap the old kitchen faucet

BecauseYour home was built in 1978, before lead-free fixtures.

Brass sold before 2014 could hold up to 8% lead, and it leaches into standing water.

Third in your plan
AirWorth it

Run the range hood every time you cook

BecauseYou cook on gas.

A gas burner fills the kitchen with nitrogen dioxide and fine particles. The hood pulls them out.

Daily habit
AirWorth it

A carbon monoxide alarm by the bedrooms

BecauseYou have a gas stove and a gas furnace.

Carbon monoxide has no smell. An alarm is the only warning you get.

Fourth in your plan
LightWorth it

Lamps low three hours before bed

BecauseYour evenings run bright until midnight.

Bright evening light pushes your body clock later. Dim, warm light lets it settle.

Daily, in Today
WaterSkip it

Bottled water for everything

BecauseOne filter at the kitchen tap covers what your test found.

You'd pay every week for what one certified filter does for years.

Not in your plan
AirSkip it

Duct cleaning to clear the air

BecauseYour air problem is smoke days and cooking, not your ducts.

Duct cleaning has not been shown to make indoor air healthier.

Not in your plan

Then it keeps watch, every day.

Smoke, smog, pollen and daylight around your home, read hour by hour, so you hear about it before you feel it.

Feel better now. Stay healthier for decades.

Your doctor looks after your body. Stasis looks after your home.

A daily watch on the air and light around your address, your water read against the research, and a plan for what to fix.

$14.99a month

or $99.99 a year, billed yearly

  • Your home's score, from your address
  • We find your water system and read its test results for you
  • Your water read against the health research, not just the legal limit
  • Hourly readings from the air monitors closest to you
  • Warnings before smoke, smog or pollen arrives, and what to do
  • Daylight and light timing for your home, by the season
  • A plan: what's worth fixing, in order, and what to skip
  • Every grade backed by peer-reviewed research
  • 20% off every lab test ordered in the app
  • Works for any US address
Membership opens at launch7-day free trialCancel anytime
Lab tests for your water and homeMembers save 20%
In-home concierge, coming soon