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Data updated March 2026 — 15,382+ cities graded across all 50 states
WaterVerge
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Live data from 15,382 water systems

What's in your water?

Instant EPA-based quality grades for every city and ZIP code in America
EPA Data Updated Quarterly 100% Free
B+
Naperville, IL
Score: 81.2/100
F
Los Angeles, CA
Score: 42.8/100
F
Houston, TX
Score: 27.8/100
15,382 cities graded
51 states covered
176M Americans on PFAS-affected water
2,854 PFAS detections
Q1 2026 data
15,382 cities graded
51 states covered
176M Americans on PFAS-affected water
2,854 PFAS detections
Q1 2026 data

Most searched cities

All cities →

Worst water in America

Full rankings →
Dayton
Ohio
F
Score: 19.8/100
Violations PFAS Lead Unresolved
Dallas
Pennsylvania
F
Score: 22.2/100
Violations PFAS Lead Unresolved
Georgetown
Delaware
F
Score: 24/100
Violations PFAS Unresolved
Lititz
Pennsylvania
F
Score: 24.2/100
Violations Lead Unresolved
Honey Brook
Pennsylvania
F
Score: 25/100
Violations Lead Unresolved
Chenango (T)
New York
F
Score: 25.2/100
Violations PFAS Lead Unresolved

Best water in America

Full rankings →
Haina
Hawaii
A+
Score: 100/100
Zero violations Low PFAS No lead issues
Kilauea (Dow)
Hawaii
A+
Score: 100/100
Low PFAS No lead issues
Olaa-Mt.View
Hawaii
A+
Score: 100/100
Zero violations Low PFAS No lead issues
Richland (T)
New York
A+
Score: 100/100
Zero violations Low PFAS No lead issues
Buhl
Alabama
A+
Score: 99.9/100
Low PFAS No lead issues
Fenwick Island
Maryland
A+
Score: 99.9/100
Low PFAS No lead issues

PFAS Contamination Tracker

Full PFAS report →
60%
of US tap water contains detectable PFAS "forever chemicals"
2,854
Water systems with PFAS detections
176M
Americans potentially exposed
4 ppt
New EPA limit for PFOS (2024)
9,728
Known contamination sites nationwide
PFAS contamination map of US states Alabama: Grade B+ (Score 83) — 351 cities Alaska: Grade C- (Score 56) — 73 cities Arizona: Grade C+ (Score 68) — 271 cities Colorado: Grade C+ (Score 66) — 244 cities Florida: Grade C+ (Score 70) — 366 cities Georgia: Grade B- (Score 73) — 372 cities Indiana: Grade B (Score 79) — 402 cities Kansas: Grade B (Score 76) — 312 cities Maine: Grade B+ (Score 81) — 156 cities Massachusetts: Grade B (Score 80) — 269 cities Minnesota: Grade A- (Score 88) — 466 cities New Jersey: Grade B- (Score 71) — 426 cities North Carolina: Grade C+ (Score 69) — 400 cities North Dakota: Grade A- (Score 86) — 101 cities Oklahoma: Grade C (Score 61) — 357 cities Pennsylvania: Grade C- (Score 58) — 559 cities South Dakota: Grade B+ (Score 82) — 137 cities Texas: Grade C+ (Score 68) — 1067 cities Wyoming: Grade C+ (Score 70) — 63 cities Connecticut: Grade C (Score 61) — 129 cities Missouri: Grade B (Score 79) — 487 cities West Virginia: Grade C (Score 62) — 245 cities Illinois: Grade B (Score 80) — 882 cities New Mexico: Grade C- (Score 59) — 153 cities Arkansas: Grade B (Score 80) — 345 cities California: Grade B (Score 77) — 690 cities Delaware: Grade B (Score 77) — 40 cities District of Columbia: Grade B (Score 77) — 6 cities Hawaii: Grade A (Score 92) — 64 cities Iowa: Grade A- (Score 88) — 430 cities Kentucky: Grade B (Score 79) — 246 cities Maryland: Grade B- (Score 74) — 107 cities Michigan: Grade B+ (Score 81) — 513 cities Mississippi: Grade C+ (Score 69) — 319 cities Montana: Grade C+ (Score 65) — 110 cities New Hampshire: Grade C (Score 65) — 98 cities New York: Grade B+ (Score 82) — 810 cities Ohio: Grade B (Score 77) — 511 cities Oregon: Grade C (Score 62) — 213 cities Tennessee: Grade B+ (Score 83) — 299 cities Utah: Grade B- (Score 70) — 177 cities Virginia: Grade B (Score 79) — 229 cities Washington: Grade B- (Score 70) — 294 cities Wisconsin: Grade B (Score 78) — 441 cities Nebraska: Grade A- (Score 86) — 196 cities South Carolina: Grade B+ (Score 82) — 195 cities Idaho: Grade C+ (Score 68) — 139 cities Nevada: Grade B (Score 76) — 63 cities Vermont: Grade B (Score 77) — 90 cities Louisiana: Grade C+ (Score 66) — 309 cities Rhode Island: Grade B- (Score 71) — 32 cities AL AK AZ CO FL GA IN KS ME MA MN NJ NC ND OK PA SD TX WY CT MO WV IL NM AR CA DE DC HI IA KY MD MI MS MT NH NY OH OR TN UT VA WA WI NE SC ID NV VT LA RI
PFAS Contamination
Low risk
Moderate
Elevated
High risk
Click any state for full report
Read the PFAS deep-dive →

Explore contamination maps

All maps →

Interactive state-by-state maps for every major contaminant we track. See where your state ranks.

🚰
Lead Levels
345 cities above action level
✖
Violations
217,100 health-based violations
🧪
HAA5 Byproducts
23 cities above 60 µg/L MCL
⚗
Chromium-6
3,856 cities with detections

How we calculate your water score

Score weight distribution
40%
25%
25%
10%
Violations 40%
Lead & Copper 25%
PFAS Levels 25%
Compliance 10%
⚠
Violations
40% weight
Health-based MCL violations, treatment technique failures, and monitoring violations from EPA SDWIS data.
🚰
Lead & Copper
25% weight
90th percentile lead and copper levels from the Lead and Copper Rule. Includes pipe material and replacement progress.
💧
PFAS Levels
25% weight
PFOA, PFOS, and total PFAS concentrations from UCMR 5 monitoring data against new 2024 MCLs.
✓
Compliance
10% weight
Timely reporting, consumer notification, and public water system operator certification status.

How does your state rank?

View all 51 states →
Water quality grades map of US states Alabama: Grade B+ (Score 83) — 351 cities Alaska: Grade C- (Score 56) — 73 cities Arizona: Grade C+ (Score 68) — 271 cities Colorado: Grade C+ (Score 66) — 244 cities Florida: Grade C+ (Score 70) — 366 cities Georgia: Grade B- (Score 73) — 372 cities Indiana: Grade B (Score 79) — 402 cities Kansas: Grade B (Score 76) — 312 cities Maine: Grade B+ (Score 81) — 156 cities Massachusetts: Grade B (Score 80) — 269 cities Minnesota: Grade A- (Score 88) — 466 cities New Jersey: Grade B- (Score 71) — 426 cities North Carolina: Grade C+ (Score 69) — 400 cities North Dakota: Grade A- (Score 86) — 101 cities Oklahoma: Grade C (Score 61) — 357 cities Pennsylvania: Grade C- (Score 58) — 559 cities South Dakota: Grade B+ (Score 82) — 137 cities Texas: Grade C+ (Score 68) — 1067 cities Wyoming: Grade C+ (Score 70) — 63 cities Connecticut: Grade C (Score 61) — 129 cities Missouri: Grade B (Score 79) — 487 cities West Virginia: Grade C (Score 62) — 245 cities Illinois: Grade B (Score 80) — 882 cities New Mexico: Grade C- (Score 59) — 153 cities Arkansas: Grade B (Score 80) — 345 cities California: Grade B (Score 77) — 690 cities Delaware: Grade B (Score 77) — 40 cities District of Columbia: Grade B (Score 77) — 6 cities Hawaii: Grade A (Score 92) — 64 cities Iowa: Grade A- (Score 88) — 430 cities Kentucky: Grade B (Score 79) — 246 cities Maryland: Grade B- (Score 74) — 107 cities Michigan: Grade B+ (Score 81) — 513 cities Mississippi: Grade C+ (Score 69) — 319 cities Montana: Grade C+ (Score 65) — 110 cities New Hampshire: Grade C (Score 65) — 98 cities New York: Grade B+ (Score 82) — 810 cities Ohio: Grade B (Score 77) — 511 cities Oregon: Grade C (Score 62) — 213 cities Tennessee: Grade B+ (Score 83) — 299 cities Utah: Grade B- (Score 70) — 177 cities Virginia: Grade B (Score 79) — 229 cities Washington: Grade B- (Score 70) — 294 cities Wisconsin: Grade B (Score 78) — 441 cities Nebraska: Grade A- (Score 86) — 196 cities South Carolina: Grade B+ (Score 82) — 195 cities Idaho: Grade C+ (Score 68) — 139 cities Nevada: Grade B (Score 76) — 63 cities Vermont: Grade B (Score 77) — 90 cities Louisiana: Grade C+ (Score 66) — 309 cities Rhode Island: Grade B- (Score 71) — 32 cities AL AK AZ CO FL GA IN KS ME MA MN NJ NC ND OK PA SD TX WY CT MO WV IL NM AR CA DE DC HI IA KY MD MI MS MT NH NY OH OR TN UT VA WA WI NE SC ID NV VT LA RI
Water Quality Score
80-100 (A/B)
60-79 (C+/B-)
40-59 (D/C)
0-39 (F)
Click any state for full report
State Grade Score Score bar # Cities
Hawaii
A
 92
64
Iowa
A-
 88
430
Minnesota
A-
 88
466
Nebraska
A-
 86
196
North Dakota
A-
 86
101
Alaska
C-
 56
73
Pennsylvania
C-
 58
559
New Mexico
C-
 59
153
Connecticut
C
 61
129
Oklahoma
C
 61
357
View all 51 states →

State water quality rankings

Full rankings →
▲ Top 5 states
1 Hawaii
A
92 2 Iowa
A-
88 3 Minnesota
A-
88 4 Nebraska
A-
86 5 North Dakota
A-
86
▼ Bottom 5 states
47 Alaska
C-
56 48 Pennsylvania
C-
58 49 New Mexico
C-
59 50 Connecticut
C
61 51 Oklahoma
C
61

Active water alerts

All alerts →

Protect your water

Full filter guide →
💧
Pitcher Filters
$20 – $60
Best for: Lead, chlorine, taste
  • No installation required
  • Replace filter every 2-3 months
  • NSF 53 certified picks available
View top picks →
🚰
Under-Sink Systems
$120 – $400
Best for: PFAS, lead, bacteria
  • Reverse osmosis or multi-stage
  • Higher contaminant removal rates
  • 6-12 month filter life
Compare options →
🏠
Whole-House Filters
$500 – $2,000+
Best for: PFAS, lead, sediment, both taps
  • Filters every faucet and shower
  • Professional installation
  • Best for well water or high contamination
Testing guide →

Essential reading

All guides →

Expert guides to help you understand your water quality report, filter the right contaminants, and protect your household.

01
Guide 9 min read
Best Water Filters to Remove PFAS (2026)
Reverse osmosis, GAC, and anion exchange remove PFAS. Basic carbon pitchers and boiling do not. Tested picks and the NSF certs that matter.
02
Guide 10 min read
Boil Water Advisory: What To Do When Your Tap Water Isn't Safe
CDC-based steps for a boil water advisory: how long to boil, bleach ratios, what's safe to use, and special guidance for infants, pregnancy, and pets.
03
Guide 13 min read
Waterborne Parasites: Cryptosporidium, Giardia & Cyclospora
The three water parasites chlorine can't reliably kill. How Cryptosporidium, Giardia, and Cyclospora differ — and how to remove all three.
04
Guide 11 min read
Best Water Softeners (2026)
Salt-free softeners don't soften. We break down ion exchange, sizing, sodium, and the scale-reduction evidence — plus our picks for hard water in 2026.

Latest news

All news →
cybersecurityinfrastructure

FBI and CISA Warn Iranian Hackers Are Altering Control Logic at US Water Systems

A July 23 federal advisory says Iran-linked actors manipulated PLCs at US water utilities, disabling critical shutdown and alarm functions.

Jul 26, 2026
boil-water-advisorywater-main-break

Boil-Water Roundup: New Orleans West Bank, Worth and Bridgeview IL, Chilhowie VA, Effingham GA

A July 25-26 run of boil-water advisories: all of New Orleans' West Bank, two Chicago-area villages, Chilhowie VA, Effingham County GA, and Scranton PA.

Jul 26, 2026
pfassettlement

Billions in PFAS Settlement Money Could Evaporate as Utility Claim Deadlines Hit This Summer

Five days left. 3M's July 31 PFAS claim deadline and the August 1 Special Needs Fund cutoff close the last windows for utility recovery — permanently.

Jul 26, 2026
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