Is My Home on Well Water?
Enter any US address to instantly find out if your property uses private well water or is connected to a public water system — completely free.
Powered by EPA Water System Service Area data • Works in all 50 states
All 50 States
Works for any address in the United States using federal EPA data.
Instant Results
Get your answer in seconds. No waiting, no signup, no email required.
Official Data
Results come from the EPA's Community Water System boundary maps and Census geocoding.
Why Check If Your Home Is on Well Water?
Over 43 million Americans — about 15% of the US population — rely on private wells for their drinking water. Unlike public water systems, private wells are not regulated by the EPA, which means homeowners are responsible for testing and maintaining their own water supply.
If You're on Well Water
- ✅ Test water annually for bacteria, nitrates, and pH
- ✅ Inspect well components every year
- ✅ Consider a water treatment system for hard water
- ✅ Know the signs of a failing well pump
- ✅ Keep a well driller's number handy for emergencies
Buying a Home With a Well?
- ✅ Request a well inspection before closing
- ✅ Get a full water quality test (not just bacteria)
- ✅ Check the well depth and pump age
- ✅ Ask about the well's flow rate (GPM)
- ✅ Budget $1,000-$3,000/year for well maintenance
Frequently Asked Questions
How does this tool work?
We use the EPA's Community Water System Service Area Boundaries to determine whether your address falls within a public water system's service area. If it doesn't, your home most likely relies on a private well. We geocode your address using the U.S. Census Bureau and cross-reference it against EPA's nationwide water system boundary maps.
Is this really free?
Yes, 100% free. The data comes from public federal government APIs (EPA and Census Bureau). No account required, no hidden fees, no email signup.
How accurate is this?
The EPA's water system boundaries cover the vast majority of public water systems in the US, but some smaller systems may not be mapped. If your address returns 'well water' but you know you're on city water, the system boundary may not yet be in EPA's database. We recommend confirming with your local water utility.
Does this work in all states?
Yes! Unlike other tools that only cover one state, our lookup works for any address in the United States. For Florida addresses, we provide additional property details from the Florida Water Management Inventory.
What should I do if I'm on well water?
Start with an annual water quality test — test for bacteria, nitrates, pH, and any local contaminants. Have your well inspected yearly by a licensed well driller. Consider installing a water treatment system if you have hard water, iron, or sulfur. Read our guide on well water testing for detailed steps.
How many Americans use well water?
Over 43 million Americans (about 15% of the population) rely on private wells for drinking water. Well usage is highest in rural areas, with states like Maine, Vermont, and Idaho having the highest percentages of homes on wells.