Best Tap Water in the U.S.

Last updated May 24, 2025

Number of Water Quality Violations
Average Water Bill
Top
Last
Number of Water Quality ViolationsQuestion Mark
1TexasTexas23,628
2PennsylvaniaPennsylvania21,527
3West VirginiaWest Virginia8,490
4New YorkNew York5,607
5OklahomaOklahoma5,379
6MichiganMichigan5,111
7AlaskaAlaska4,650
8IllinoisIllinois4,637
9IndianaIndiana4,612
10WashingtonWashington3,907
11New JerseyNew Jersey3,815
12New MexicoNew Mexico3,700
13OhioOhio3,598
14FloridaFlorida3,192
15ArizonaArizona3,122
16LouisianaLouisiana3,103
17ColoradoColorado2,929
18MaineMaine2,907
19WisconsinWisconsin2,903
20ConnecticutConnecticut2,900
21North CarolinaNorth Carolina2,877
22IdahoIdaho2,503
23OregonOregon2,317
24MontanaMontana2,092
25CaliforniaCalifornia2,038
26MissouriMissouri1,820
27VermontVermont1,376
28GeorgiaGeorgia1,312
29VirginiaVirginia1,288
30KansasKansas1,140
31ArkansasArkansas1,135
32MississippiMississippi1,129
33IowaIowa852
34UtahUtah815
35New HampshireNew Hampshire673
36TennesseeTennessee671
37WyomingWyoming632
38MinnesotaMinnesota545
38MassachusettsMassachusetts545
40MarylandMaryland400
41AlabamaAlabama376
42NevadaNevada358
43South DakotaSouth Dakota303
44Rhode IslandRhode Island243
45North DakotaNorth Dakota199
46South CarolinaSouth Carolina196
47KentuckyKentucky142
48DelawareDelaware131
49NebraskaNebraska121
50HawaiiHawaii2

Introduction

In all corners of America, from Alaska's glacial rivers to Florida's tropical springs, the quality of tap water is a testament to the natural resources, infrastructure, and regulatory fortitude of each state. With over 50,000 community water systems in the U.S, the quality of tap water can drastically vary, making it an intricate part of our everyday lives and health. According to the most recent water quality violation data, there is a wide range in the commitment and success by states in maintaining compliance with federal water standards.

Our analysis relies on the water quality violations metric, which catalogues the instances when tap water quality fails to meet federal guidelines in a state. Fewer violations commonly indicate a more robust drinking water sector and cleaner tap water. Still, it's necessary to remember that these figures are statewide totals and might not reflect the specific conditions in individual cities or communities.

**Key findings: **

  • Hawaii shines as the U.S state with the best tap water, recording a mere two water quality violations. This is a remarkable achievement given the standard of federal water quality regulations.
  • The two subsequent top-performers are Nebraska and Delaware, with 121 and 131 violations respectively.
  • An alarming trend emerges as we analyze states at the other end of the spectrum. Texas (23,628 violations), Pennsylvania (21,527 violations) and West Virginia (8,490 violations), are struggling significantly with maintaining clean tap water.
  • Overall, a strong geographical trend doesn't leap out from the data, with top performers spread across the country, from the islands of Hawaii to the heartlands of Nebraska.

Region ↕# of Water Quality Violations↕Average Water Bill↕
Texas23,628$37
Pennsylvania21,527$31
West Virginia8,490$91
New York5,607$30
Oklahoma5,379$35
Michigan5,111$29
Alaska4,650$68
Illinois4,637$26
Indiana4,612$30
Washington3,907$75
New Jersey3,815$72
New Mexico3,700$32
Ohio3,598$27
Florida3,192$33
Arizona3,122$64
Louisiana3,103$21
Colorado2,929$39
Maine2,907$24
Wisconsin2,903$18
Connecticut2,900$69
North Carolina2,877$20
Idaho2,503$38
Oregon2,317$76
Montana2,092$38
California2,038$77
Missouri1,820$39
Vermont1,376$18
Georgia1,312$28
Virginia1,288$36
Kansas1,140$27
Arkansas1,135$26
Mississippi1,129$23
Iowa852$32
Utah815$38
New Hampshire673$27
Tennessee671$43
Wyoming632$53
Minnesota545$28
Massachusetts545$34
Maryland400$46
Alabama376$30
Nevada358$26
South Dakota303$26
Rhode Island243$32
North Dakota199$31
South Carolina196$33
Kentucky142$49
Delaware131$46
Nebraska121$23
Hawaii2$64

States with the Best Tap Water

The state with the the best tap water in the United States is none other than the tropical paradise, Hawaii. Boasting a remarkably low number of two water quality violations, Hawaii demonstrates exceptional commitment to maintaining pure and safe water sources.

Following in Hawaii's footsteps are several states where efforts to ensure clean tap water do not go unnoticed. Nebraska and Delaware, with 121 and 131 water quality violations respectively, take the second and third place. The fourth spot goes to Kentucky with 142 water quality violations, and South Carolina follows close with 196 violations. North Dakota, Rhode Island, South Dakota, Nevada, and Alabama complete the top ten, with water quality violations ranging from 199 to 376. These states, despite their geographic diversity, share a common success in providing relatively safe and clean tap water to their residents.

States with the Best Tap Water (Number of Violations):

  1. Hawaii - 2
  2. Nebraska - 121
  3. Delaware - 131
  4. Kentucky - 142
  5. South Carolina - 196
  6. North Dakota - 199
  7. Rhode Island - 243
  8. South Dakota - 303
  9. Nevada - 358
  10. Alabama - 376
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