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Free water report + filter finder

Know what's in every glass.

See your tap water report, pick what you care about, and get the filter that actually removes it, explained in plain words.

EPA district mapsUtility water reportsNSF-certified picks only
Tap water splashing into a glass at a kitchen faucet
Step 1

Confirm your water district

Districts don't follow ZIP codes, so we check your exact address against the district's mapped boundary.

Search above or tap the map to see the water districts around you.
Each color is a separate district Your district No public water mapped (likely private wells) ZIP area (approx.)

Boundaries come from the EPA's mapped service areas, built from state water agency data. Some are estimates; your water bill is the final word. On a private well? Choose it in step 2.

Step 2

Where does your water come from?

Great. Find your district in step 1 and its report shows below. Tested your own tap too? Add your numbers and we'll show what they mean.
Already tested?

Enter your own results

Type numbers from your utility's report or your own test kit. We'll show what each number means and which systems fix it. Your results stay on this device.

Tip: pick the unit printed on your report and we convert it. Home strips are less precise than a lab, so we show them as estimates.

Your water report

Your water, explained

Find your district in step 1 to attach its official report.
Sample results. Report numbers aren't loaded on this site yet, so these tiles show an example. Enter numbers from your report or test kit in step 2 to see yours.
Below the health goal Legal, but above the health goal Over the legal limit The health goal is the level with no expected health risk. The legal limit is what your utility must meet.

Needs attention

Looks fine

Utility numbers are system averages measured where water enters the system. Your home's pipes can add lead or copper. Order a lab test kit

What do you want out of your water?

Pick any. Everything below re-sorts around your choices.

What works, and why

Recommendations are pending expert review by a licensed plumber before they go live.

Water streaming from a rain shower head
Hard water?

You feel it in the shower first.

Minerals leave spots on glass, crust on shower heads and scale inside your water heater. Here's what each option really does.

Water softenerRemoves the minerals. Softer skin, no scale. Needs salt.
Salt-free conditionerStops scale sticking. Water still tests hard.
Shower filterCuts chlorine smell. Doesn't touch hardness.
See softeners for your water Softener vs. conditioner

Picked for your water

Ranked by what they remove and how they're certified. Never by commission.

Also worth it

Keep your system working and confirm your results.

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Confirm at your tap
Certified lab test kitTests lead and PFAS at your faucet
[$]
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For your RO pick
Replacement filter setDue every [6–12] months
[$]
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For the shower
Chlorine and chloramine shower filterKDF + catalytic carbon
[$]
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For your softener
Softener salt or potassium[lb] per month at your hardness
[$]

We earn a commission if you buy through these links. It never changes the ranking. Product names, photos and prices are placeholders until each pick is reviewed.

Compare side by side

Tick Compare on up to 3 systems above. 0 selected.

Process facts are from our treatment table; [bracketed] fields are product placeholders.

Every drop counts: compare RO systems

"Wasted per year" assumes a household of 4. Makers rate units at about 60 psi and 77°F; cold water or low pressure means more waste and slower flow. Model data is a placeholder until products are reviewed.

ModelWaste ratioWasted / yrGal / dayTankNSF/ANSI 58 claimsRemineralizesMin. psiFilters / yr
[Model A][1:1][gal][n]Tankless[PFOA/PFOS, lead, arsenic]Yes[n][$]
[Model B][2:1][gal][n]Tank[PFOA/PFOS, fluoride]No[n][$]
[Model C][3:1][gal][n]Countertop[PFOA/PFOS]Non/a[$]
How much water does reverse osmosis waste?

Dive deeper

Start hereFiltered, softened, purified: what's the difference?
Do salt-free softeners work?One removes hardness. One doesn't. How much water does RO waste?And why it sends water down the drain. Certifications decodedNSF/ANSI 42, 53, 55, 58, 401 in plain words. What filter removes PFAS?Which systems hold back "forever chemicals". What filter removes lead?The certification claim to look for. Is a whole-house filter worth it?When every tap needs treating, and when it doesn't.
All buyer questions →

Ready to buy?

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