Cleanest Tap Water Records in the US: Highest Purity Scores (2024)
The water systems serving Juneau, AK, Jasper, AL and Decatur, AL have the highest Purity Scores of the 4,194 city reports considered: the cleanest records on this one measure, not a safety ranking. From public EPA records (2024-12-31). It ranks the published record, not which water is safest.
Juneau, AK ranks first in 2026
Juneau, AK is first. Jasper, AL, Decatur, AL, North Marshall, AL and Sumter County, AL follow. Hartselle, AL and Pickens County, AL rank last.
All 25 ranked water systems
- 1Juneau, AKpopulation served ~38,526CITY AND BOROUGH OF JUNEAU · PWSID AK2110342 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 2Jasper, ALpopulation served ~28,638JASPER WATER WORKS & SEWER BOARD · PWSID AL0001336 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 3Decatur, ALpopulation served ~77,103DECATUR, MUNICIPAL UB OF · PWSID AL0001084 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 4North Marshall, ALpopulation served ~15,300NORTH MARSHALL UTILITIES · PWSID AL0000945 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 5Sumter County, ALpopulation served ~10,983SUMTER COUNTY WATER AUTHORITY · PWSID AL0001222 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 6Elmore, ALpopulation served ~13,680ELMORE WATER & SEWER AUTHORITY · PWSID AL0000535 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 7Arab, ALpopulation served ~39,795ARAB, WATER WORKS BOARD OF THE CITY OF · PWSID AL0000934 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 8Citizens, ALpopulation served ~15,096CITIZENS WATER SERVICE, INC. · PWSID AL0001293 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 9Selma, ALpopulation served ~21,834SELMA, THE WW AND SB OF THE CITY OF · PWSID AL0000490 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 10Leeds, ALpopulation served ~21,300LEEDS WATER WORKS BOARD · PWSID AL0000753 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 11Scottsboro, ALpopulation served ~22,200SCOTTSBORO WATER SEWER & GB · PWSID AL0000729 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 12Haleyville, ALpopulation served ~11,865HALEYVILLE, WATER WORKS & SEWER BOARD · PWSID AL0001411 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 13Cullman County, ALpopulation served ~57,006CULLMAN COUNTY WATER DEPARTMENT · PWSID AL0000394 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 14Hamilton, ALpopulation served ~10,500HAMILTON WATER & WASTEWATER DEPARTMENT · PWSID AL0000926 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 15Walnut Hill, ALpopulation served ~14,127WALNUT HILL WATER AUTHORITY · PWSID AL0001289 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 16Cullman, ALpopulation served ~36,741CULLMAN, CITY OF · PWSID AL0001786 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 17Rainbow City, ALpopulation served ~12,633RAINBOW CITY, THE UTILITIES BOARD OF · PWSID AL0000588 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 18Trussville Ub, ALpopulation served ~36,300TRUSSVILLE, UB OF THE CITY OF · PWSID AL0000761 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 19Cherokee County, ALpopulation served ~11,013CHEROKEE COUNTY WATER & SEWER AUTHORITY · PWSID AL0000189 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 20Jacksonville, ALpopulation served ~14,217JACKSONVILLE WATER WORKS GAS AND SEWER · PWSID AL0000154 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 21Eufaula, ALpopulation served ~17,970EUFAULA WATER WORKS · PWSID AL0000085 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 22Alexander City, ALpopulation served ~34,005ALEXANDER CITY, CITY OF · PWSID AL0001265 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 23Ozark, ALpopulation served ~19,965OZARK UTILITIES BOARD · PWSID AL0000441 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 24Pickens County, ALpopulation served ~14,364PICKENS COUNTY WATER AUTHORITY · PWSID AL0001106 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
- 25Hartselle, ALpopulation served ~22,233HARTSELLE UTILITY BOARD, CITY OF · PWSID AL0001086 · Purity Score 100/100 · Confidence: not yet published · Assessed at the water-system level
The top 25 of 4,194 city reports are listed. Only cities with a computed Purity Score and a resolved serving system are eligible; all others are excluded.
How this snapshot is built
- How this snapshot is built
Cities ranked by their PurityMap Purity Score. A higher score means fewer or less-severe measured exceedances across the contaminants that were tested.
- Reading the order
A high score reflects a clean measured record, not proof that every possible contaminant is absent. Monitoring depth varies by system.
- Exclusions
The top 25 of 4,194 city reports are shown. Only cities with a computed Purity Score and a resolved serving system are eligible; all others are excluded.
Comparable does not mean complete.
This ranking compares water systems on one measure. It never replaces a full system report, a city-resolution check, or a certified household test, and missing monitoring is excluded, never scored as favourable.