Drinking Water Systems by State
Choose a state or jurisdiction to review public water systems, EPA violation history, recent compliance records, and city-level pages from the Q2 2026 SDWIS snapshot.
Alabama
AL503 systems · 7,390 historical records
Alaska
AK414 systems · 109,309 historical records
American Samoa
AS10 systems · 1,713 historical records
Arizona
AZ763 systems · 30,461 historical records
Arkansas
AR732 systems · 12,734 historical records
California
CA2,864 systems · 21,013 historical records
Colorado
CO1,176 systems · 28,300 historical records
Connecticut
CT707 systems · 44,282 historical records
Delaware
DE289 systems · 2,375 historical records
District of Columbia
DC4 systems · 2 historical records
Florida
FL1,593 systems · 28,300 historical records
Georgia
GA1,742 systems · 5,058 historical records
Guam
GU5 systems · 13 historical records
Hawaii
HI118 systems · 401 historical records
Idaho
ID765 systems · 3,194 historical records
Illinois
IL1,787 systems · 37,113 historical records
Indiana
IN766 systems · 1,839 historical records
Iowa
IA1,080 systems · 11,846 historical records
Kansas
KS854 systems · 1,327 historical records
Kentucky
KY373 systems · 15,254 historical records
Louisiana
LA908 systems · 12,996 historical records
Maine
ME386 systems · 4,099 historical records
Maryland
MD464 systems · 428 historical records
Massachusetts
MA527 systems · 2,069 historical records
Michigan
MI1,377 systems · 2,790 historical records
Minnesota
MN968 systems · 2,878 historical records
Mississippi
MS1,011 systems · 35,610 historical records
Missouri
MO1,432 systems · 18,854 historical records
Montana
MT803 systems · 29,601 historical records
Nebraska
NE583 systems · 5,651 historical records
Nevada
NV195 systems · 4,873 historical records
New Hampshire
NH706 systems · 7,556 historical records
New Jersey
NJ555 systems · 6,404 historical records
New Mexico
NM558 systems · 15,632 historical records
New York
NY2,250 systems · 3,168 historical records
North Carolina
NC1,980 systems · 47,031 historical records
North Dakota
ND305 systems · 769 historical records
Northern Mariana Islands
MP36 systems · 2,627 historical records
Ohio
OH1,125 systems · 32,404 historical records
Oklahoma
OK889 systems · 47,463 historical records
Oregon
OR938 systems · 69,294 historical records
Pennsylvania
PA1,851 systems · 229,177 historical records
Puerto Rico
PR402 systems · 49,813 historical records
Rhode Island
RI89 systems · 1,800 historical records
South Carolina
SC562 systems · 8,883 historical records
South Dakota
SD463 systems · 5,785 historical records
Tennessee
TN446 systems · 4,163 historical records
Texas
TX4,749 systems · 39,050 historical records
US Virgin Islands
VI77 systems · 154 historical records
Utah
UT502 systems · 25,297 historical records
Vermont
VT405 systems · 14,073 historical records
Virginia
VA1,056 systems · 15,495 historical records
Washington
WA2,311 systems · 104,804 historical records
West Virginia
WV414 systems · 31,419 historical records
Wisconsin
WI1,022 systems · 7,058 historical records
Wyoming
WY323 systems · 1,665 historical records