Free home water test kit: find out what's really in your water
We mail it. You fill it. Our lab tests it. Free.
On a well? This kit is for you: we mail a small bottle with free return postage, you fill it from your tap and mail it back, and our lab sends your results and what they mean. On city water, your ZIP code report is instant; order a kit only if you want a before-and-after. No cost and nothing to buy.
- 100% free
- Free return postage
- Real lab results
Want the answer for your home?
Tell us your ZIP code and a rep calls you within 5 minutes to answer every question. No pressure, no sales visit.
You're probably on this page because:
- You want to know what's actually in your water
- Your water tastes or smells a little off
- You just moved in and don't trust the tap yet
Guessing isn't a plan. A free test is.
Most people are guessing about their water
- 59% of people are concerned about their water quality.
- Nearly 2 in 3 have never had it tested.
- Over 40% think their water affects their skin and hair.
Sources: WQA 2025 Consumer Insights via WCP; Leaf Home consumer water survey.
Is this kit for you?
- On a well? Yes. Your own well or a small shared well isn't tested by anyone else, and even a tested community well can bring iron, sulfur and hardness to your tap. This is for you.
- On city water? Get your instant free report by ZIP code. Order a kit only for a before-and-after.
Order my free kit Get my instant city water report
4 easy steps
- We mail you a small bottle
- Fill it from your kitchen tap
- Mail it back. Postage is free.
- Get your results and what they mean
What we test for
- Hardness
- Iron
- Total dissolved solids
- Chlorine
- [Confirm the full list with the lab]
What you get back
- Your results in plain English
- What's normal and what isn't
- The fix, with a flat price
- No obligation to buy
Order your free kit
Our take
What a lab test tells you that test strips can't
The question we get asked most about this, after [thousands] of installs:
Test strips from the hardware store are a good start. They give you a rough number for hardness, chlorine and pH. But they're color charts, so they're approximate, and they don't test for most things.
A lab test gives you exact numbers, and it checks things strips can't, like iron, manganese and total dissolved solids. [Confirm full list.] That's the difference between "your water is kind of hard" and "your water is 12 grains, with 0.8 ppm of iron," which is what we need to pick the right system.
Tips for an accurate sample: Use the kitchen cold tap, not a tap that runs through a filter or softener. Run the water for a couple of minutes first, unless your kit says otherwise. Fill to the line, cap it tight, and mail it back the same day.
Testing for lead is different. Lead tests usually need the first water out of the tap after it's sat overnight. Follow the instructions for whatever test you're doing.
Our own lab, 20+ years of water testing
We test water for homes and work with other water companies. Your sample goes to our own lab.
- 20+ years in water
- Our own patents
- We supply other water companies
- [Thousands] of systems sold
- Licensed installers
Related Pages
Questions people ask
Is the water test really free?
Yes. The kit, the return postage and the lab test are all free.
Do I have to buy anything?
No. You get your results either way. If you want a fix, we'll give you a flat price.
How long do results take?
About a week from when you mail it back. [Confirm lab turnaround.]
How do I collect the sample?
Fill the bottle from your kitchen cold tap. Instructions are in the kit.
How do I test my water at home?
Test strips give you a quick hardness number. A lab test checks much more. Our kit gets you the lab test for free.
How do I test my water hardness?
A hardness test strip works for a rough number. Our free kit gives you the exact number from a lab.
How do I test well water?
Use a lab test, not just strips. The CDC recommends testing a private well at least once a year.
How do I test for lead in my water?
[If our lab tests lead: our kit covers it.] If not, use a state-certified lab. Lead usually comes from old pipes, not the city supply.
Isn't city water already tested?
Yes. Cities test and publish reports, and that's what your instant ZIP report uses. Your home's pipes can still add things after the water leaves the plant.