Best Tap Water in the U.S.

United States
147,948# of Water Quality ViolationsNational Total
Average Water BillNational Average
Number of Water Quality ViolationsQuestion Mark
Map visualization
223,628
1
TexasTexas
23,628
2
PennsylvaniaPennsylvania
21,527
3
West VirginiaWest Virginia
8,490
4
New YorkNew York
5,607
5
OklahomaOklahoma
5,379
6
MichiganMichigan
5,111
7
AlaskaAlaska
4,650
8
IllinoisIllinois
4,637
9
IndianaIndiana
4,612
10
WashingtonWashington
3,907
11
New JerseyNew Jersey
3,815
12
New MexicoNew Mexico
3,700
13
OhioOhio
3,598
14
FloridaFlorida
3,192
15
ArizonaArizona
3,122
16
LouisianaLouisiana
3,103
17
ColoradoColorado
2,929
18
MaineMaine
2,907
19
WisconsinWisconsin
2,903
20
ConnecticutConnecticut
2,900
21
North CarolinaNorth Carolina
2,877
22
IdahoIdaho
2,503
23
OregonOregon
2,317
24
MontanaMontana
2,092
25
CaliforniaCalifornia
2,038
26
MissouriMissouri
1,820
27
VermontVermont
1,376
28
GeorgiaGeorgia
1,312
29
VirginiaVirginia
1,288
30
KansasKansas
1,140
31
ArkansasArkansas
1,135
32
MississippiMississippi
1,129
33
IowaIowa
852
34
UtahUtah
815
35
New HampshireNew Hampshire
673
36
TennesseeTennessee
671
37
WyomingWyoming
632
38
MinnesotaMinnesota
545
38
MassachusettsMassachusetts
545
40
MarylandMaryland
400
41
AlabamaAlabama
376
42
NevadaNevada
358
43
South DakotaSouth Dakota
303
44
Rhode IslandRhode Island
243
45
North DakotaNorth Dakota
199
46
South CarolinaSouth Carolina
196
47
KentuckyKentucky
142
48
DelawareDelaware
131
49
NebraskaNebraska
121
50
HawaiiHawaii
2
Best Tap Water in the U.S.
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Last updated May 24, 2025

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.

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

Sources & Notes

Average Water Bill

Mean monthly cost for water utility services.

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