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Water system · PWSID PR0005376

LAS PIEDRAS HUMACAO

HUMACAO, PR · ~36,032 people served

Check your exact address → HUMACAO overview

Excellent

PurityRadar safety score

PWSID

PR0005376

State

Puerto Rico

City

HUMACAO

Population served

36,032

Primary source

Surface water

Score history

▼ 15 points — the score moved from 100 to 85 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 85

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Jul 2024). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

5.2 ppt

limit 4 ppt

Above EPA limit · 1.3×

Lithium

10,170 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2022. Official EPA record →

Monitoring & reporting · EPA contaminant 0200 began Jun 2022 Resolved

Monitoring & reporting · EPA contaminant 2036 began Jul 2021 Resolved

Monitoring & reporting · EPA contaminant 2046 began Jul 2021 Resolved

Other · EPA contaminant 7000 began Jul 2020 Resolved

Other · EPA contaminant 7500 began Apr 2019 Resolved

Monitoring & reporting · EPA contaminant 0100 began Feb 2019 Resolved

Monitoring & reporting · EPA contaminant 3015 began Feb 2019 Resolved

Monitoring & reporting · EPA contaminant 3014 began Feb 2019 Resolved

Other · EPA contaminant 7000 began Oct 2018 Resolved

Monitoring & reporting · EPA contaminant 0100 began Apr 2018 Resolved

Monitoring & reporting · EPA contaminant 3015 began Apr 2018 Resolved

Monitoring & reporting · EPA contaminant 3014 began Apr 2018 Resolved

Recent enforcement actions

State action · SFJ Aug 2022
State action · SOX Jul 2022
State action · SOX Dec 2021
State action · SFJ Oct 2021
State action · SFJ Oct 2021
State action · SOX Aug 2020
State action · SOX Jul 2020
State action · SFJ Dec 2019

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Aug 2023

0.514 · max 1.13 mg/l as N · 30

Arsenic

1 station · latest Aug 2023

0.4 · max 0.5 ug/l · 8

Copper

1 station · latest Aug 2023

2.1 · max 11.2 ug/l · 8

Lead

1 station · latest Aug 2023

0.185 · max 1.79 ug/l · 8

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system PR0005376 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.