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Water system register

Every system in the register, published or not.

Systems without a Water Profile stay in this list. Hiding them would make the record look more complete than it is.

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The register

Listed in the order the search contract publishes. Search and filters narrow the list; nothing is re-sorted.
NEW YORK CITY SYSTEMNY7003493New York City8,271,000 served37 evidence recordsLOS ANGELES-CITY, DEPT. OF WATER & POWERCA1910067Los Angeles3,875,566 served38 evidence records · 2 above a referenceCITY OF HOUSTONTX1010013Houston2,970,543 served34 evidence records · 2 above a referenceCHICAGOIL0316000Chicago2,721,308 served34 evidence records · 1 above a referenceSAN ANTONIO WATER SYSTEMTX0150018San Antonio2,643,729 served34 evidence records · 2 above a referenceMDWASA - MAIN SYSTEMFL4130871Miami2,377,460 served31 evidence records · 2 above a referenceWASHINGTON SUBURBAN SANITARY COMMISSIONMD0150005Washington Suburban Sanitary1,900,000 served31 evidence recordsPHOENIX CITY OFAZ0407025Phoenix1,695,000 served34 evidence records · 2 above a referenceCITY OF BALTIMOREMD0300002Baltimore1,600,000 served32 evidence records · 1 above a referencePHILADELPHIA WATER DEPARTMENTPA1510001Philadelphia1,600,000 served37 evidence records · 3 above a referenceLAS VEGAS VALLEY WATER DISTRICTNV0000090Las Vegas1,539,277 served38 evidence records · 2 above a referenceEAST BAY MUDCA0110005Oakland1,468,000 served32 evidence recordsSAN DIEGO, CITY OFCA3710020San Diego1,408,937 served32 evidence records · 2 above a referenceDALLAS WATER UTILITYTX0570004Dallas1,356,479 served36 evidence records · 2 above a referenceCOLUMBUS PUBLIC WATER SYSTEMOH2504412Columbus1,309,468 served32 evidence records · 1 above a referenceCLEVELAND PUBLIC WATER SYSTEMOH1801212Cleveland1,308,955 served34 evidence recordsDENVER WATER BOARDCO0116001Denver1,287,000 served37 evidence records · 1 above a referenceCHARLOTTE WATERNC0160010Charlotte1,206,285 served35 evidence recordsSEATTLE PUBLIC UTILITIESWA5377050Seattle1,161,961 served34 evidence recordsFAIRFAX COUNTY WATER AUTHORITYVA6059501Fairfax County1,121,613 served31 evidence records · 2 above a referenceCITY OF AUSTIN WATER & WASTEWATERTX2270001Austin1,115,323 served34 evidence records · 1 above a referenceMO AMERICAN ST LOUIS ST CHARLES COUNTIESMO6010716Florissant1,111,000 served31 evidence records · 1 above a referenceSUFFOLK COUNTY WATER AUTHORITYNY5110526Suffolk County1,100,000 served32 evidence records · 4 above a referenceATLANTAGA1210001Atlanta1,089,893 served33 evidence recordsSAN JOSE WATERCA4310011Campbell1,039,920 served31 evidence records · 1 above a reference
Showing 25 of 300 in view

Utility pages by state

Each page lists the utility's contact details beside its record.
  • PublishedA Water Profile is published. Rated systems show their own Purity Score with its confidence.
  • No profile publishedThe system is in the register but its records haven’t been read. Not a pass, not a fail.
  • Stale recordThe newest sample is older than the freshness window, so the profile may be out of date.
  • Score withheldA profile exists but no score is published for it.
  • Service area unresolvedWe can’t yet tie the system to a PWSID or the places it serves.