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State profile · EPA SDWIS + UCMR5

American Samoa Drinking Water Quality

91 public water systems serve 50,626 people across American Samoa, with every Safe Drinking Water Act violation and UCMR5 PFAS result on record.

91
Water systems
1,883
Total violations
22%
Systems w/ a violation
100%
PFAS detection rate

The verdict

Across American Samoa, 20 of 91 water systems (22.0%) carry at least one EPA violation, and 1 of 1 UCMR5-tested systems show PFAS.

1,883
Total EPA violations on record
13%
Health-based (MCL / treatment)
22.0%
Systems with ≥1 violation
100%
UCMR5 PFAS detection rate
Water Systems
91
Total Violations
1,883
Violation Rate
22%
PFAS Detection
100%
1 of 1 tested

Violation Composition

How American Samoa's 1,883 violations break down by type, per EPA SDWIS classification.

Health-based (238) Monitoring/Reporting (1,645)
Metric Value Share
Public water systems91-
Population served50,626-
Total violations1,883100%
Health-based violations23812.6%
Systems with violations2022.0%
PFAS detection rate1 of 1100%

Health-based violations indicate the contaminant exceeded an EPA Maximum Contaminant Level (MCL) or treatment-technique requirement. Monitoring/reporting violations indicate procedural issues (missed tests, late reports) - not necessarily a contamination event.

Largest Water Systems

Central ASG
Pago Pago, AS · 45,315 served
636 violations
Fagasa ASG
Pago Pago, AS · 577 served
35 violations
Vatia ASG
Pago Pago, AS · 460 served
48 violations
Masefau ASG
Pago Pago, AS · 457 served
34 violations
Aunuu ASG
Pago Pago, AS · 402 served
253 violations
Aoa ASG
Pago Pago, AS · 344 served
95 violations
Afono ASG
Pago Pago, AS · 327 served
50 violations
Ofu - Olosega ASG
Pago Pago, AS · 270 served
295 violations
Tau-Faleasao ASG
Pago Pago, AS · 236 served
262 violations
Fitiuta ASG
Pago Pago, AS · 213 served
162 violations
Skyview - Aua
Pago Pago, AS · 25 served
Amys Store - Petesa
Pago Pago, AS · 25 served
Pacific Minimart (R ) - Tafuna
Pago Pago, AS · 25 served
Pacific Minimart (L) - Tafuna
Pago Pago, AS · 25 served
Canton Mart - Puapua
Pago Pago, AS · 25 served
California Store Inc (R ) - Leone
Pago Pago, AS · 25 served
California Store Inc (L) - Leone
Pago Pago, AS · 25 served
Samoa Tasty - Mapusaga
Pago Pago, AS · 25 served
LYC Inc - Malaeimi
Pago Pago, AS · 25 served
HQH Store - Ottoville
Pago Pago, AS · 25 served

Most Violations

#1 Central ASG Pago Pago
636
#2 Ofu - Olosega ASG Pago Pago
295
#3 Tau-Faleasao ASG Pago Pago
262
#4 Aunuu ASG Pago Pago
253
#5 Fitiuta ASG Pago Pago
162
#6 Aoa ASG Pago Pago
95
#7 Afono ASG Pago Pago
50
#8 Vatia ASG Pago Pago
48
#9 Fagasa ASG Pago Pago
35
#10 Masefau ASG Pago Pago
34
#11 ZS Development - Pago Pago Pago Pago
3
#12 ABC Fax Store - Fagatogo Pago Pago
2
#13 CS Mart - Vaitogi Pago Pago
1
#14 Tafuna Mini Mart - Tafuna Pago Pago
1
#15 L and J Store - Fagaima Pago Pago
1

Counties in American Samoa

Eastern District
9 systems · 47,380 served · 1,116 violations
Western District
71 systems · 2,327 served · 48 violations
Manu'a District
3 systems · 719 served · 719 violations
View all 91 systems in American Samoa →

Drinking Water Guides

Is Your Tap Water Safe?

How to interpret water quality reports and know when to take action.
PFAS in Drinking Water

What forever chemicals are, EPA testing results, and 2024 standards.
Check Your Water System

Step-by-step guide to finding and understanding your local water data.

Frequently Asked Questions

How many water systems are in American Samoa? ▼
American Samoa has 91 public water systems serving approximately 50,626 people. These include community water systems, non-transient non-community systems, and transient non-community systems regulated under the Safe Drinking Water Act.
How many drinking water violations are in American Samoa? ▼
American Samoa has 1,883 total drinking water violations on record, with 238 classified as health-based violations. 22.0% of water systems in the state have at least one violation.
Has PFAS been found in American Samoa drinking water? ▼
Of 1 water systems tested for PFAS in American Samoa, 1 had PFAS detected, a 100% detection rate. PFAS are persistent "forever chemicals" that do not break down in the environment.
What is the violation rate for American Samoa water systems? ▼
American Samoa's violation rate is 22%. This measures the percentage of public water systems that have at least one recorded violation in the EPA SDWIS database, including both health-based and monitoring/reporting violations.
Where does this American Samoa water data come from? ▼
All drinking water data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS is the federal database that tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Read our methodology - how this data is sourced, computed, and verified.

Related

All states → | Most violations → | Compare counties →
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.