Know Your Water.
Choose Your System.

CheckMyTap shows you exactly what is in your water and helps you understand which treatment system fits your home, before you spend thousands on the wrong one.

Bloomington, MN 257 PPMHoboken, NJ 61 PPMBroken Arrow, OK 224 PPMEverett, WA 26 PPMCanton, OH 125 PPMConcord, NC 32 PPMLee's Summit, MO 211 PPMSan Angelo, TX 298 PPMOlympia, WA 17 PPMIndependence, MO 186 PPMKent, WA 16 PPMLawton, OK 204 PPMCorvallis, OR 27 PPMYoungstown, OH 160 PPMGulfport, MS 107 PPMWaco, TX 177 PPMWhite Plains, NY 40 PPMPlymouth, MN 254 PPMCasper, WY 196 PPMAppleton, WI 304 PPM Chicago, IL 140 PPMMedford, OR 28 PPMSan Diego, CA 200 PPMAtlanta, GA 30 PPMPasadena, CA 182 PPMDanbury, CT 50 PPMFremont, CA 192 PPMJonesboro, AR 49 PPMRochester, NY 162 PPMLos Angeles, CA 180 PPMToledo, OH 148 PPMWilmington, NC 49 PPMBoca Raton, FL 249 PPMSpringfield, MA 51 PPMGastonia, NC 53 PPMJuneau, AK 16 PPMDallas, TX 100 PPMNashville, TN 110 PPMIndependence, MO 186 PPMGrand Forks, ND 259 PPM

Hardest Water in the United States

These cities have the most aggressive hard water in the country. Scale buildup, appliance damage, and increased soap costs are daily realities.

💀 Hardest Water in the US

Madison, WI

312 PPM · Extremely Hard · Madison Water Utility ☠️ Runner-Up Hardest

Lawrence, KS

309 PPM · Extremely Hard · City of Lawrence 🪦 3rd Hardest

Appleton, WI

304 PPM · Extremely Hard · Appleton Water Utility #4 · 302 PPM

Manhattan, KS

302 PPM · Extremely Hard · City of Manhattan #5 · 300 PPM

Mesa, AZ

300 PPM · Extremely Hard · City of Mesa #6 · 300 PPM

Chandler, AZ

300 PPM · Extremely Hard · City of Chandler #7 · 299 PPM

Tempe, AZ

299 PPM · Extremely Hard · City of Tempe #8 · 299 PPM

Springfield, MO

299 PPM · Extremely Hard · City Utilities of Springfield

Highest PFAS Contamination

PFAS "forever chemicals" have been detected above the EPA's 2024 health standard of 4 ppt in these cities. Standard filters may not remove them.

☣️ Highest PFAS Detected

Honolulu, HI

20 ppt 18 ppt PFAS

Charlotte, NC

Greensboro, NC

Winston-Salem, NC

Raleigh, NC

Detroit, MI

Cleanest Tap Water in the US

Not every city has a water problem. These cities have naturally soft, clean water from protected sources. Most homes here do not need a softener.

🏆 Cleanest Municipal Water

Portland, ME

Soft · Sebago Lake 🥈 Runner-Up Cleanest

Kirkland, WA

Soft · Seattle Water (Cedar/Tolt Rivers) 🥉 3rd Cleanest

Vancouver, WA

Soft · Groundwater wells 14 PPM

Salem, OR

Soft · North Santiam River 15 PPM

Boston, MA

Soft · Quabbin + Wachusett Reservoirs 15 PPM

Portland, OR

Soft · Bull Run Watershed

Highest Lead Levels

Lead in drinking water comes from aging plumbing, not the source. These cities have the highest detected levels in our database.

⚠ Highest Lead Detected

Jackson, MS

9 ppb lead · Ross Barnett Reservoir 8 ppb

Chicago, IL

8 ppb lead · Lake Michigan 8 ppb

Pittsburgh, PA

8 ppb lead · Allegheny River 7 ppb

Baltimore, MD

7 ppb lead · Liberty + Prettyboy Reservoirs 7 ppb

Milwaukee, WI

7 ppb lead · Lake Michigan 7 ppb

Stamford, CT

7 ppb lead · Reservoirs

Learn

In-depth guides that go beyond the data.

Hard Water and Your Hair

Why hard water makes hair dry, brittle, and brassy. What actually fixes it.

PFAS and Pregnancy

What expectant parents need to know about forever chemicals in drinking water.

Softener Installation Cost

Real costs for equipment, installation, salt, and maintenance. What to budget.

Understand Before You Buy

The water treatment industry sells a lot of equipment people do not need. Start with understanding, then choose a system.

Softener vs. Filter: Which Do You Actually Need?

A softener removes minerals. A filter removes contaminants. They are not the same thing, and many homes need both. Start here.

What Hard Water Actually Costs You

Hard water is not a health risk. It is an economic one. See the real dollar impact on your plumbing, appliances, and monthly bills.

PFAS Forever Chemicals in Tap Water

Over 100 million Americans have PFAS in their drinking water. What they are, where they come from, and what actually removes them.

Why Your Water Tastes Like a Pool

Chlorine keeps water safe but ruins the taste. The fix is simple and affordable. Here is what to look for.