PFAS in Northern Mariana Islands drinking water
EPA's final UCMR 5 data covers 2 public water systems in Northern Mariana Islands, serving about 49,268 people. PFAS turned up in 1 of them (50%). 1 averaged above at least one EPA limit at a sampling point, affecting about 48,524 people.
Highest PFOA and PFOS averages among systems serving 1,000 or more: Commonwealth Utilities Corp (Saipan) (0.0 / 32.1 ppt).
Every tested system in Northern Mariana Islands
Largest first. PFOA and PFOS columns show the average at each system's worst sampling point; EPA's limit for each is 4 ppt. Filter by name:
| Water system | People | PFOA | PFOS | PFAS found | Result |
|---|---|---|---|---|---|
| Commonwealth Utilities Corp (Saipan) · Saipan | 48,524 | - | 32.1 | 9 | Above limit |
| Commonwealth Health Corporation · Saipan | 744 | - | - | 0 | None found |
On a private well in Northern Mariana Islands?
EPA's program only covers public systems. Private wells are never part of UCMR 5, so the only way to know is to test. Our well testing guide covers which lab tests to order, and the best well water systems covers what to install once you have results.
Cite this page
Well & Tap. "PFAS in Northern Mariana Islands drinking water: results for 2 systems." Data: U.S. EPA UCMR 5, final release August 2026. https://wellandtap.com/pfas/northern-mariana-islands/
Source: EPA UCMR 5 final occurrence data (August 2026); population from EPA SDWIS. Method.