Home hazard report for 00931 — San Juan, PR
ZIP 00931 is served by Metropolitano: 91 violations since 2016, latest lead result 6 ppb, PFAS 10.9 ppt. San Juan is in EPA radon no zone.
Health-based violations since 2016: Interim Enhanced Surface Water Treatment Rule, Tthm, Total Haloacetic Acids (Haa5). All are listed as resolved.
90th-percentile lead in the latest round (Jul 2016). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
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. 6 PFAS compounds detected.
EPA has not assigned this area a radon zone. Testing is the only way to know.
The nearest active Superfund site is 9.2 miles away.
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Where ZIP 00931 is
blue: utility service area · scroll or pinch to zoomDrinking water: Metropolitano
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Interim Enhanced Surface Water Treatment Rule | 63 |
| Tthm | 17 |
| Total Haloacetic Acids (Haa5) | 7 |
| Revised Total Coliform Rule | 2 |
| Carbon, Total | 1 |
| Surface Water Treatment Rule | 1 |
A health-based violation means a contaminant exceeded its legal limit (MCL) or a required treatment technique was not met, as reported by the state to EPA’s SDWIS. All are listed as resolved or archived; the latest began Apr 2026.
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 (“forever chemicals”)
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| PFOA | 10.9 ppt | 2 of 20 | 4 ppt MCL |
| PFBA | 8.6 ppt | 6 of 20 | — |
| PFOS | 7.8 ppt | 10 of 20 | 4 ppt MCL |
| PFDA | 7.5 ppt | 1 of 20 | — |
| PFPeA | 4 ppt | 2 of 20 | — |
| PFHxA | 3.5 ppt | 2 of 20 | — |
| PFHpA | not detected | 0 of 20 | — |
| PFHxS | not detected | 0 of 20 | — |
| PFNA | not detected | 0 of 20 | — |
| PFBS | not detected | 0 of 20 | — |
| HFPO-DA (GenX) | not detected | 0 of 20 | — |
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.
Radon in San Juan
EPA radon no zone — not mapped. EPA has not assigned this area a radon zone. Testing is the only way to know.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Naval Security Group Activity Sabana Seca, Puerto Rico · EPA ID PR4170027383 | Cleaned up & deleted | 6.0 mi |
| Scorpio Recycling, Inc. Candeleria Ward, Puerto Rico · EPA ID PRD987376662 | Active (final NPL) | 9.2 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
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 about 00931
Who supplies drinking water to ZIP 00931?
Metropolitano (EPA ID PR0002591), a surface water (rivers, lakes) system serving about 1,084,637 people.
Is there lead in San Juan, PR tap water?
The utility’s latest 90th-percentile lead result (Jul 2016) was 6 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does San Juan, PR water have PFAS?
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. 6 PFAS compounds detected.
Has the water system in 00931 had violations?
Health-based violations since 2016: Interim Enhanced Surface Water Treatment Rule, Tthm, Total Haloacetic Acids (Haa5). All are listed as resolved.
Are there Superfund sites near 00931?
The nearest active Superfund site is 9.2 miles away. Sites within 10 miles: Naval Security Group Activity (6.0 mi, Cleaned up & deleted); Scorpio Recycling, Inc. (9.2 mi, Active (final NPL)).
Is radon a problem in San Juan?
San Juan is in EPA radon no zone (not mapped). EPA has not assigned this area a radon zone. Testing is the only way to know.