Well Water vs City Water: Who Tests It and What Rules Apply
Short answer: city (public) water must meet EPA drinking water rules under the Safe Drinking Water Act, and the utility tests it. A private well is not covered by those rules, so testing is up to the owner.
| City / public water | Private well | |
|---|---|---|
| Rules | EPA limits (MCLs) under the Safe Drinking Water Act | Not regulated by EPA; some states require tests at sale or for new wells |
| Who tests | The water utility, on a set schedule | You |
| Yearly report | Community systems send a Consumer Confidence Report | Only your own lab results |
| Treatment | Treated at a plant, usually disinfected | Usually untreated unless you add treatment |
What well owners should do
EPA recommends testing a private well every year for total coliform bacteria, nitrates, total dissolved solids and pH, and more often if something changes. Use EPA limits as a yardstick: compare your numbers in the results reader.
Example of a state rule
New Jersey's Private Well Testing Act requires a well test when a home with a well is sold, and landlords must test too. See why private wells aren't covered.
Sources
Questions
Is well water regulated like city water?
No. EPA's Safe Drinking Water Act rules cover public water systems, not private household wells.
How often should I test well water?
EPA recommends at least once a year for total coliform bacteria, nitrates, total dissolved solids and pH.
How do I see my city water quality?
Community water systems publish a yearly Consumer Confidence Report. Ask your utility or check its website.
Free well water checklist
15 family-friendly steps based on CDC and EPA guidance. Print it, keep it on the fridge, and know when to call a certified lab.
More guides
- FHA, VA and USDA Loan Well Water Test RequirementsLoan rules for well water tests, side by side, from HUD, VA and USDA handbooks.
- Mail-In vs Drop-Off Well Water Testing: Which to ChooseThe 30-hour bacteria clock, and which tests travel well by mail.
- How Much Does Well Water Testing Cost? Real Lab PricesReal published prices from public labs, free programs, and the EPA-approved-lab myth.
- Testing Tap, Spring, Lake, River or Pond WaterTap, spring, lake, river and pond water: where to test, and why pools and aquariums are different.