W
SafeWater

Water Quality by State

Browse EPA drinking water data for all U.S. states and territories. Click a state to see lead levels, violations, and individual water systems.

AB
2 systems
Alabama
1,873 systemsAvg lead: 2.23 ppb7 violations
Alaska
3,661 systemsAvg lead: 3.94 ppb47 violations
American Samoa
302 systemsAvg lead: 1.00 ppb
AP
1 systemsAvg lead: 0.44 ppb
Arizona
4,383 systemsAvg lead: 2.31 ppb31 violations
Arkansas
3,972 systemsAvg lead: 4.54 ppb51 violations
BC
3 systems
California
20,579 systemsAvg lead: 2.31 ppb142 violations
Colorado
5,105 systemsAvg lead: 2.33 ppb17 violations
Connecticut
11,255 systemsAvg lead: 3.46 ppb74 violations
Delaware
1,387 systemsAvg lead: 4.24 ppb32 violations
District of Columbia
48 systemsAvg lead: 4.75 ppb2 violations
Florida
19,917 systemsAvg lead: 2.92 ppb105 violations
Georgia
5,716 systemsAvg lead: 2.25 ppb50 violations
Guam
21 systemsAvg lead: 2.24 ppb
Hawaii
237 systemsAvg lead: 1.21 ppb6 violations
Idaho
4,387 systemsAvg lead: 2.44 ppb21 violations
Illinois
26,675 systemsAvg lead: 2.66 ppb91 violations
Indiana
9,915 systemsAvg lead: 3.97 ppb119 violations
Iowa
5,369 systemsAvg lead: 2.66 ppb18 violations
Kansas
1,814 systemsAvg lead: 2.50 ppb23 violations
Kentucky
2,232 systemsAvg lead: 1.68 ppb1 violations
Louisiana
5,089 systemsAvg lead: 2.33 ppb40 violations
Maine
6,141 systemsAvg lead: 2.99 ppb32 violations
Maryland
7,992 systemsAvg lead: 2.89 ppb56 violations
Massachusetts
3,929 systemsAvg lead: 3.45 ppb46 violations
Michigan
27,019 systemsAvg lead: 3.65 ppb161 violations
Minnesota
21,775 systemsAvg lead: 3.17 ppb109 violations
Mississippi
3,209 systemsAvg lead: 2.12 ppb18 violations
Missouri
6,167 systemsAvg lead: 2.40 ppb31 violations
Montana
4,736 systemsAvg lead: 2.74 ppb28 violations
Navajo Nation
72 systemsAvg lead: 4.34 ppb1 violations
NB
3 systems
Nebraska
2,779 systemsAvg lead: 2.28 ppb7 violations
Nevada
1,566 systemsAvg lead: 2.07 ppb10 violations
New Hampshire
4,131 systemsAvg lead: 27.64 ppb482 violations
New Jersey
14,932 systemsAvg lead: 5.31 ppb249 violations
New Mexico
2,786 systemsAvg lead: 2.92 ppb22 violations
New York
26,516 systemsAvg lead: 3.97 ppb153 violations
North Carolina
23,923 systemsAvg lead: 5.58 ppb494 violations
North Dakota
1,606 systemsAvg lead: 1.95 ppb5 violations
Northern Mariana Islands
223 systemsAvg lead: 4.16 ppb7 violations
NS
1 systems
Ohio
16,365 systemsAvg lead: 3.86 ppb223 violations
Oklahoma
5,688 systemsAvg lead: 1.87 ppb29 violations
ON
4 systemsAvg lead: 1.45 ppb
Oregon
6,071 systemsAvg lead: 2.92 ppb51 violations
Pennsylvania
22,622 systemsAvg lead: 11.43 ppb1206 violations
PQ
2 systemsAvg lead: 3.00 ppb
Puerto Rico
1,000 systemsAvg lead: 7.76 ppb50 violations
QC
2 systemsAvg lead: 1.20 ppb
Region 01
1 systems
Region 02
2 systems
Region 05
2 systems
Region 06
34 systemsAvg lead: 3.38 ppb
Region 07
2 systems
Region 08
13 systemsAvg lead: 5.00 ppb
Region 09
56 systemsAvg lead: 5.00 ppb
Region 10
9 systems
Rhode Island
1,147 systemsAvg lead: 6.02 ppb30 violations
South Carolina
5,512 systemsAvg lead: 4.13 ppb65 violations
South Dakota
1,715 systemsAvg lead: 2.43 ppb4 violations
Tennessee
6,170 systemsAvg lead: 2.89 ppb12 violations
Texas
16,249 systemsAvg lead: 1.48 ppb52 violations
U.S. Virgin Islands
1,077 systemsAvg lead: 15.95 ppb49 violations
Utah
2,385 systemsAvg lead: 3.00 ppb15 violations
Vermont
4,304 systemsAvg lead: 3.87 ppb43 violations
Virginia
9,028 systemsAvg lead: 3.73 ppb109 violations
Washington
10,086 systemsAvg lead: 2.67 ppb61 violations
West Virginia
4,357 systemsAvg lead: 3.62 ppb42 violations
Wisconsin
24,118 systemsAvg lead: 2.81 ppb59 violations
Wyoming
1,877 systemsAvg lead: 2.34 ppb6 violations