Is Juana Diaz, PR Tap Water Safe? Quality & Contaminants

What was found in Juana Diaz's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

Contaminant	Level vs EPA limit	Suppliers	Source
Pfhxa	0.2600 µg/L No EPA limit set Main supplier: EXPERIMENTAL · 6,445 people · 2024	1/8	UCMR-5
Pfpea	0.1100 µg/L No EPA limit set Main supplier: EXPERIMENTAL · 6,445 people · 2024	1/8	UCMR-5
Pfba	0.0540 µg/L No EPA limit set Main supplier: EXPERIMENTAL · 6,445 people · 2024	1/8	UCMR-5
PFBS	0.0420 µg/L No EPA limit set Main supplier: EXPERIMENTAL · 6,445 people · 2024	3/8	UCMR-5
PFOA	0.0220 µg/L No EPA limit set Main supplier: EXPERIMENTAL · 6,445 people · 2024	1/8	UCMR-5
Pfhpa	0.0130 µg/L No EPA limit set Main supplier: EXPERIMENTAL · 6,445 people · 2024	1/8	UCMR-5
PFOS	0.0054 µg/L No EPA limit set Main supplier: EXPERIMENTAL · 6,445 people · 2024 Highest in the city: 0.0124 µg/L — JACAGUAS · 4,261 people · 2023	3/8	UCMR-5
PFHXS	0.0089 µg/L No EPA limit set Highest in the city: JACAGUAS · 4,261 people · 2023	1/8	UCMR-5
Lead	0.0060 mg/L 40% of the EPA limit 0.0150 mg/L Main supplier: EXPERIMENTAL · 6,445 people · 2016 Highest in the city: 0.0070 mg/L — GUARDIA NACIONAL DE PR, FORT ALLEN · 3,000 people · 2023	6/8	LCR

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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Juana Diaz

Supplier	Population served
EXPERIMENTAL	6,445
ARUZ	5,105
JACAGUAS	4,261
GUARDIA NACIONAL DE PR, FORT ALLEN	3,000
AMELIA	2,390
AGUSTINILLO	1,316
GUARAGUAO	240
PORTILLO - MIRAMAR	210

Frequently asked questions about Juana Diaz tap water

Is Juana Diaz tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Juana Diaz. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Juana Diaz?

8 public water suppliers report drinking-water monitoring for Juana Diaz, PR to the EPA. Each is listed above with its population served.

What contaminants are in Juana Diaz's water?

The contaminants EPA monitoring detected in Juana Diaz include Pfhxa, Pfpea, Pfba, PFBS, PFOA. The full list, with the level at the main supplier and the data source, is in the table above.

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.