American Samoa tap water quality
10 community water systems serving 48,601 people.
Data: U.S. EPA · How we read the data · How we check it
PFAS: EPA's 2023–2025 testing. Lead: results from the last five years. 7 more systems have no recent lead results in EPA's database.
Largest water systems in American Samoa
- Central ASG45,315 people · Surface water · American SamoaColiform bacteria violationsAlso: Lithium above screening level
- Fagasa ASG577 people · Groundwater · American SamoaNot in EPA's PFAS sample
- Vatia ASG460 people · Groundwater · American SamoaNot in EPA's PFAS sample
- Masefau ASG457 people · Groundwater · American SamoaNot in EPA's PFAS sample
- Aunuu ASG402 people · Groundwater · American SamoaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations · Coliform bacteria violations
- Aoa ASG344 people · Groundwater · American SamoaColiform bacteria violations
- Afono ASG327 people · Groundwater · American SamoaNot in EPA's PFAS sample
- Ofu – Olosega ASG270 people · Groundwater · American SamoaColiform bacteria violations
- Tau-Faleasao ASG236 people · Groundwater · American SamoaColiform bacteria violation
- Fitiuta ASG213 people · Groundwater · American SamoaColiform bacteria violation
Most health-based violations since 2016
- Aunuu ASG402 people · Groundwater · American SamoaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations · Coliform bacteria violations
- Central ASG45,315 people · Surface water · American SamoaColiform bacteria violationsAlso: Lithium above screening level
- Aoa ASG344 people · Groundwater · American SamoaColiform bacteria violations
- Fitiuta ASG213 people · Groundwater · American SamoaColiform bacteria violation
- Ofu – Olosega ASG270 people · Groundwater · American SamoaColiform bacteria violations
- Tau-Faleasao ASG236 people · Groundwater · American SamoaColiform bacteria violation
Questions
Does American Samoa tap water have PFAS?
EPA tested 1 community water system in American Samoa for 29 PFAS between 2023 and 2025. 0 had at least one regulated PFAS detected, and 0 had an entry-point average above a 2024 federal limit. Those 0 systems serve about 0 people. Systems have until 2029 to meet the limits.
How many American Samoa water systems have violations?
6 systems in American Samoa had at least one health-based violation since 2016 (54 violations in total). 7 violations are currently listed as unaddressed.
Which American Samoa water systems are over the lead action level?
0 systems had a lead 90th percentile above the 15 ppb action level in their most recent results from the last five years. Another 7 systems have no lead results in EPA's database from the last five years, including 1 whose last result was above the action level. Lead depends on each home's pipes, so a test of your own tap is the only way to know your level.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.