Water system

Guayanilla Urbano

Name: Guayanilla Urbano drinking water quality
Creator: TapWaterZip
License: https://www.usa.gov/government-works

Puerto Rico EPA ID PR0004054 7,302 people Groundwater

What this means for you

Is it safe to drink right now?: Based on the latest EPA data, Guayanilla Urbano has no unresolved health-based violations from the past year. Water that meets federal standards is generally considered safe to drink for most healthy people.
Should I use a filter?: Optional. Nothing in this data strongly calls for one. Many people still filter for chlorine taste and odor.
What kind of filter?: For taste and odor (chlorine/chloramine), an NSF/ANSI 42 pitcher or faucet filter is enough. See matched standards and product picks.

This is general information from public EPA data, not medical advice. Lead often comes from a home’s own pipes, so only a test of your tap can tell your exposure. If you are pregnant, caring for an infant, or have a weakened immune system, ask your doctor or health department.

Summary: No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Latest lead 90th percentile on file is from 2015 (older than 5 years, not graded).

EPA data snapshot 2026Q3. Grade is TapWaterZip's own score — see methods.

PFAS (“forever chemicals”), EPA UCMR 5

Chemical	Highest location average	Highest single sample	Federal limit	Detections/samples
PFBS	2 ppt	4 ppt	none	1/6
PFOS	2.8 ppt	5.5 ppt	4 ppt	1/6

4 PFAS tested and not detected

PFHxS, HFPO-DA, PFNA, PFOA (6 samples each, below EPA minimum reporting levels).

Hazard Index (PFHxS, PFNA, GenX, PFBS): 0 (limit 1.0, proposed for repeal).

Averages are per sampling location across UCMR 5 samples (non-detects counted as 0), approximating the rule’s running annual average. Not an official compliance determination; PFOA/PFOS MCL compliance begins April 26, 2029.

Lead and copper

Lead 90th percentile6 ppb2015-12-31

Current action level15 ppbLCRI lowers to 10 ppb on Nov 1, 2027

This lead result is more than 5 years old, so it is not counted in the grade. Ask your utility for its latest lead sampling.

Violations (last 5 years)

No violations reported since Oct 2021.

Filters matched to this water

FILTER PICKS

Look for filters certified (NSF, IAPMO or WQA) to these standards for the specific contaminant. Buttons open the maker’s page or an Amazon search; use “Check NSF listing” to verify a model’s claims. No affiliate links yet — grades are never sold.