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Infrastructure
Bridge Safety 624,000 bridge inspections Aviation Safety 30,000+ NTSB aviation events Dam Safety 92,600 dam safety records Water Safety 433,000+ public water systems Railroad Safety 438,000+ rail crossings Pipeline Safety 8,800+ pipeline incidents
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Browse Water Systems

433,347 public water systems.

Public Water Systems Database

Browse 433,347 EPA-regulated public water systems with identifiers, population served, and water source type. Use the filters below to narrow results by state, system type, or name.

System Name PWSID State Type Population Served
EL PASO WATER UTILITIES PUBLIC SERVICE B TX0710002 TX Community 747,168
DEKALB COUNTY GA0890001 GA Community 743,000
CITY OF TAMPA WATER DEPARTMENT FL6290327 FL Community 733,886
TUCSON CITY OF AZ0410112 AZ Community 732,906
COBB COUNTY GA0670003 GA Community 695,000
CINCINNATI, CITY OF-MILLER OH3100411 OH Community 686,400
PA AMER WATER CO-PITTSBURGH PA5020039 PA Community 686,000
BOSTON WATER AND SEWER COMMISSION (MWRA) MA3035000 MA Community 675,647
CONSOLIDATED COCA-COLA-BOT CO PA4110804 PA Transient Non-Community 670,000
EASTERN MUNICIPAL WD CA3310009 CA Community 666,581
PORTLAND WATER BUREAU OR4100657 OR Community 666,200
METROPOLITAN UTILITIES DISTRICT NE3105507 NE Community 660,000
MEMPHIS LIGHT, GAS, & WATER TN0000450 TN Community 659,500
OKLAHOMA CITY OK1020902 OK Community 644,000
RALEIGH, CITY OF NC0392010 NC Community 640,000
DETROIT CITY OF MI0001800 MI Community 633,218
D.C. WATER AND SEWER AUTHORITY DC0000002 DC Community 632,323
HNL-WINDWARD-PEARL HARBOR HI0000331 HI Community 631,389
MILWAUKEE WATERWORKS WI2410100 WI Community 626,000
PALM BEACH COUNTY WATER UTILITIES FL4504393 FL Community 618,746
NJ AMERICAN WATER - RARITAN NJ2004002 NJ Community 615,430
BATON ROUGE WATER COMPANY LA1033005 LA Community 596,844
CENTRAL ALABAMA WATER SYSTEM AL0000738 AL Community 585,000
ALBUQUERQUE WATER SYSTEM NM3510701 NM Community 560,326
MDWASA - PALMETTO COUNTRY CLUB FL4131617 FL Community 560,000
CITY OF FRESNO CA1010007 CA Community 545,716
ORLANDO UTILITIES COMMISSION FL3480962 FL Community 536,466
QUEEN LANE WATER PLANT PA1510003 PA Community 535,000
AURORA CITY OF CO0103005 CO Community 533,407
CITY OF SACRAMENTO MAIN CA3410020 CA Community 520,407
PITTSBURGH WATER & SEWER AUTH PA5020038 PA Community 520,000
NEW YORK CITY - GROUNDWATER SYSTEM NY7011735 NY Community 518,000
KANSAS CITY PWS MO1010415 MO Community 513,800
PINELLAS COUNTY UTILITIES FL6521405 FL Community 506,353
SUNDROP BOTTLING CO INC NC0136599 NC Transient Non-Community 500,000
ASHBURTON MD0300001 MD Community 500,000
BALTIMORE CITY MUNICIPAL WORKS MD0030013 MD Community 500,000
BALTIMORE CITY MUNICIPAL WORKS MD0002906 MD Community 500,000
MCWA NY2701047 NY Community 496,753
WSSC (INCLUDED IN 0150005) MD0160014 MD Community 482,000
WATER DISTRICT 1 OF JOHNSON CO KS2009110 KS Community 482,000
HCWRD/SOUTH-CENTRAL FL6290787 FL Community 473,500
LONG BEACH UTILITIES DEPARTMENT CA1910065 CA Community 466,772
MESA CITY OF AZ0407095 AZ Community 466,000
COLORADO SPRINGS UTILITIES CO0121150 CO Community 464,111
PA GAS AND WATER CO-CENTRAL DI PA2400069 PA Community 453,000
LITTLE RIVER MARINA GA0730032 Transient Non-Community 453,000
TACOMA WATER DIVISION CITY OF WA5386800 WA Community 448,771
COLUMBUS-HAP CREMEAN WTP OH2500421 OH Community 446,812
IRVINE RANCH WATER DISTRICT CA3010092 CA Community 444,800