Home hazard report for 00681 — Mayaguez, PR
ZIP 00681 is served by Mayaguez: 13 violations since 2016, latest lead result 6 ppb, PFAS not detected. Mayaguez is in EPA radon no zone.
Health-based violations since 2016: TTHM, Total Haloacetic Acids (Haa5), Interim Enhanced Surface Water Treatment Rule. All are listed as resolved.
90th-percentile lead in the latest round (Jul 2015). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
EPA has not assigned this area a radon zone. Testing is the only way to know.
The nearest active Superfund site is 7.6 miles away.
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Where ZIP 00681 is
blue: utility service area · scroll or pinch to zoomDrinking water: Mayaguez
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| TTHM | 6 |
| Total Haloacetic Acids (Haa5) | 3 |
| Interim Enhanced Surface Water Treatment Rule | 3 |
| Long Term 2 Enhanced 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 Sep 2022.
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 |
|---|---|---|---|
| PFHxS | not detected | 0 of 26 | — |
| PFBS | not detected | 0 of 26 | — |
| PFPeA | not detected | 0 of 26 | — |
| PFBA | not detected | 0 of 26 | — |
| HFPO-DA (GenX) | not detected | 0 of 26 | — |
| PFDA | not detected | 0 of 26 | — |
| PFHpA | not detected | 0 of 26 | — |
| PFOA | not detected | 0 of 26 | 4 ppt MCL |
| PFNA | not detected | 0 of 26 | — |
| PFHxA | not detected | 0 of 26 | — |
| PFOS | not detected | 0 of 26 | 4 ppt MCL |
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 Mayaguez
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 |
|---|---|---|
| Cabo Rojo Ground Water Contamination Cabo Rojo, Puerto Rico · EPA ID PRN000206319 | Active (final NPL) | 7.6 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 00681
Who supplies drinking water to ZIP 00681?
Mayaguez (EPA ID PR0003283), a surface water (rivers, lakes) system serving about 152,342 people.
Is there lead in Mayaguez, PR tap water?
The utility’s latest 90th-percentile lead result (Jul 2015) 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 Mayaguez, PR water have PFAS?
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Has the water system in 00681 had violations?
Health-based violations since 2016: TTHM, Total Haloacetic Acids (Haa5), Interim Enhanced Surface Water Treatment Rule. All are listed as resolved.
Are there Superfund sites near 00681?
The nearest active Superfund site is 7.6 miles away. Sites within 10 miles: Cabo Rojo Ground Water Contamination (7.6 mi, Active (final NPL)).
Is radon a problem in Mayaguez?
Mayaguez is in EPA radon no zone (not mapped). EPA has not assigned this area a radon zone. Testing is the only way to know.