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Tap water quality report

Las Piedras Humacao

EPA monitoring tested this supplier for 31 contaminants and detected 3. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

31
contaminants tested
3
detected
38,897
people served
113
health-based violations
PR rankingsLead in PRPFAS in PR
Water source
Surface water
Ownership
Local government
Counties served
Humacao Municipio, Naguabo Municipio

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

113
health-based violations
249
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-04-01 → 2015-04-30
MCL Health-based Resolved 2015-04-01 → 2015-04-30
MCL Health-based Resolved 2015-04-01 → 2015-04-30
MCL Health-based Resolved 2014-11-01 → 2014-11-30
TT Health-based Resolved 2010-05-01 → 2010-05-31
TT Health-based Resolved 2010-05-01 → 2010-05-31
TT Health-based Resolved 2008-09-01 → 2008-09-30
TT Health-based Resolved 2008-09-01 → 2008-09-30
TT Health-based Resolved 2008-09-01 → 2008-09-30
TT Health-based Resolved 2008-09-01 → 2008-09-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOS 0.0054 µg/L 3/6 2024

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0060 mg/L 40%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2014
Lithium
10.17 µg/L
No EPA limit set
 1/6 UCMR-5 2024
28 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPfpeaPfpesPftaPftrdaPfuna

Utility contact

Contact
LAS PIEDRAS HUMACAO
Phone
787-620-2277

Frequently asked questions about Las Piedras Humacao

Is Las Piedras Humacao tap water safe to drink?

EPA monitoring detected 3 contaminants in Las Piedras Humacao's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Las Piedras Humacao's water?

EPA monitoring detected Lead, PFOS, Lithium. The full list with the level and data source for each is above.

How many people does Las Piedras Humacao serve?

Las Piedras Humacao reports serving 38,897 people in PR, per its EPA record.

Has Las Piedras Humacao had any water quality violations?

The EPA has 249 violations on file for Las Piedras Humacao, of which 113 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.