Us Army, Fort Buchanan
Us Army, Fort Buchanan (EPA ID PR0132051) in Guaynabo, PR supplies surface water (rivers, lakes) to about 6,411 people: no health-based violations since 2016, latest lead result 12 ppb, PFAS 4.6 ppt.
No health-based violations reported since 2016.
Below the current 15 ppb action level but above 10 ppb, the action level under EPA's Lead and Copper Rule Improvements (compliance from 2027). Latest round: Jan 2026.
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 2 PFAS compounds detected.
System facts
Health-based violations
No health-based violations reported since 2016.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| PFOS | 4.6 ppt | 2 of 6 | 4 ppt MCL |
| PFHxS | 3.5 ppt | 1 of 6 | — |
| PFDA | not detected | 0 of 6 | — |
| PFBA | not detected | 0 of 6 | — |
| HFPO-DA (GenX) | not detected | 0 of 6 | — |
| PFPeA | not detected | 0 of 6 | — |
| PFOA | not detected | 0 of 6 | 4 ppt MCL |
| PFNA | not detected | 0 of 6 | — |
| PFHpA | not detected | 0 of 6 | — |
| PFBS | not detected | 0 of 6 | — |
| PFHxA | not detected | 0 of 6 | — |
EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), samples 2023–2025; ppt = parts per trillion (ng/L). The 4.0 ppt maximum contaminant levels for PFOA and PFOS were set by EPA in 2024; water systems have until the end of the decade to comply.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions
Has Us Army, Fort Buchanan had drinking water violations?
No health-based violations reported since 2016.
What is the lead level in Us Army, Fort Buchanan water?
The latest 90th-percentile lead result (Jan 2026) was 12 ppb. EPA’s action level is 15 ppb (10 ppb from 2027).
Does Us Army, Fort Buchanan have PFAS in its water?
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 2 PFAS compounds detected.