Search city, ZIP, contaminant⌘KFind my water
Water-system resolver

Find the water system behind your tap.

A city or ZIP code can overlap multiple suppliers. PurityMap resolves the public water systems on record, then lets you open the evidence for the system that serves you.

We use the place you type to look up public records. Don't enter account numbers or other private details.

  1. 1
    Enter a locationA city with its state, a five-digit ZIP, or a PWSID.
  2. 2
    Confirm the supplierMatch the system name or PWSID with your bill.
  3. 3
    Open the recordEvery finding, its limit and its source.
Not on public water?

I'm on a private well

Private wells aren't part of the public record, so there is no system to match. A tap test is the only way to know what's in the water.

What do you want to learn?
Well-water testing by county →Find the right well test →
Not sure who supplies you?

Verify a utility from your bill

The company collecting payment may differ from the public water system supplying or treating the water.

  1. 1Find the utility name on your water or sewer bill.
  2. 2Look for a PWSID on your annual water quality report (CCR).
  3. 3Search that ID above. It matches one system exactly.
Scope

What location matching can and can't tell you

Explore the national mapRead the methodology
It can
  • Connect a place to the public water systems on record
  • Show how each match was made and how sure it is
  • Open the system’s findings, limits and sources
It can't
  • Confirm the water at a specific tap, building or account
  • Cover private wells or premise plumbing
  • Replace a household test when the question is about your tap