PRASA – Aibonito la Plata water quality
Aibonito, PR · serves 16,354 people (6,125 connections) · Surface water · Local government · EPA ID PR0004545
Data: U.S. EPA · How we read the data · How we check it
Summary
PFAS above the 2024 federal limits. Systems have until 2029 to meet the PFAS limits.
Is it an emergency? No: PFAS limits are about years of exposure, not a glass of water, and nothing in EPA's data calls for you to stop drinking the water today. If your utility ever issues a boil-water or do-not-drink notice, follow it.
- PFAS
- Above limitPFOS above the federal limit in EPA's 2023–2025 testing (PFOS 25.6 ppt vs a limit of 4 ppt, where ppt = parts per trillion).
- Lead
- Out of dateEPA's national database has no lead results for this system since 2014 (then 6 ppb, 90th percentile). Systems this size normally test every one to three years, so this most likely means newer results were not reported to EPA, not that testing stopped. Ask the utility for its latest results.
- Violations
- Resolved5 health-based violations since 2016, most recently Jan 2020. One required an urgent public notice within 24 hours (the kind behind boil-water notices), most recently Nov 2016. What to do if you get a notice.
- Pregnant, or mixing baby formula with tap water? Babies drink more water for their size, so PFAS exposure matters more for them. Consider bottled water or a filter certified for PFAS for formula, and ask your doctor. Health effects.
- To lower your PFAS exposure now, a home filter certified for PFAS reduction works (reverse osmosis, or activated carbon certified to NSF/ANSI 53 or 58). Filters for these results.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Got a boil-water or do-not-drink notice? What each notice means and what to do.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read PRASA – Aibonito la Plata's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (787) 620-2277. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 4 entry points tested Mar 2023 to Dec 2023. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Not detected Limit 4 ppt | – |
| PFOS Above limit Limit 4 ppt | 25.6 ppt 6.4× the limit |
| PFHxS Detected, below limit Limit 10 ppt | 3.75 ppt 38% of the limit |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Detected, below limit Limit 1 | 0.38 |
| PFBS Detected, below limit Guideline 2,000 ppt | 0.8 ppt |
| PFBA Detected, below limit Guideline 6,000 ppt | 2.75 ppt |
| PFHxA Detected, below limit Guideline 3,000 ppt | 3.8 ppt |
| PFPeA Detected, no limit | 6.1 ppt |
For context: the PFOS average is higher than at 98% of the Puerto Rico systems EPA tested.
29 PFAS tested, 6 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Not detected in 10 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 6 ppb lead (Jul 2014 – Dec 2014). No results since 2014
This is the newest lead result in EPA's national database. Utilities report lead results to their state, and states pass them to EPA. Gaps like this usually mean the newer results did not reach EPA's database, not that the utility stopped testing. Results this old may not reflect the water today. Ask the utility or your state drinking water program for the latest lead monitoring.
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jul 2014 – Dec 2014 | 6 ppb |
| Jul 2013 – Dec 2013 | 6 ppb |
| Jul 2012 – Dec 2012 | 6 ppb |
Earlier results (9)
| Jul 2011 – Dec 2011 | 6 ppb |
| Jul 2010 – Dec 2010 | 5 ppb |
| Jul 2009 – Dec 2009 | 6 ppb |
| Jan 2009 – Jun 2009 | 6 ppb |
| Jun 2006 – Sep 2006 | 3 ppb |
| Jul 2003 – Dec 2003 | 4.2 ppb |
| Jan 2000 – Jun 2000 | 4 ppb |
| Jan 1993 – Jun 1993 | 22 ppb |
| Jul 1992 – Dec 1992 | 80 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
| When | What happened |
|---|---|
| Jan 2016 – Jan 2020 4 times | The running annual average for TTHM was above the legal limit. EPA record: TTHM · Maximum Contaminant Level Violation, Average · measured 0.081 mg/l (limit 0.080 mg/L) Resolved |
| Nov 2016 | The water was too cloudy too often in a month. Cloudiness can shield germs from disinfection. Urgent public notice required What that means EPA record: Interim Enhanced Surface Water Treatment Rule · Monthly Turbidity Exceed (Enhanced SWTR) (limit ) Resolved |
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 23.8 ppb | 300 ppb |
| Strontium | 0.28 ppm | 1.5 ppm |
| Vanadium | 26.4 ppb | 21 ppb |
| Chlorate | 1,252 ppb | 210 ppb |
| 1,4-Dioxane | 0.26 ppb | 0.35 ppb |
| Chromium-6 | 0.29 ppb | – |
Where it serves
Aibonito
ZIP codes the system reported serving: 00653, 00726
Nearby utilities
- PRASA – Aibonito Urbano Aibonito · same area · PFAS above limit
- PRASA – Las Bocas Barranquitas · 4 mi · PFAS above limit
- PRASA – Cidra Urbano Cidra · 7 mi · PFAS above limit
- PRASA – Salinas Urbano Salinas · 11 mi · PFAS above limit
- PRASA – Santa Isabel Urbano Santa Isabel · 15 mi · PFAS above limit
- PRASA – Aruz Juana Díaz · 17 mi · PFAS above limit
Questions
Is PRASA – Aibonito la Plata water safe to drink?
PRASA – Aibonito la Plata had 5 health-based violations since 2016, all since resolved. EPA testing found PFAS above the 2024 federal limits, which systems must meet by 2029. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does PRASA – Aibonito la Plata water have PFAS?
Yes. EPA's 2023–2025 testing of PRASA – Aibonito la Plata found 6 PFAS at least once. The highest entry-point averages were above the federal limit for PFOS: PFOS 25.6 ppt (limit 4 ppt for PFOA and PFOS, 10 ppt for the others).
What is the lead level in PRASA – Aibonito la Plata water?
The most recent 90th-percentile lead result for PRASA – Aibonito la Plata is 6 ppb, for the period ending Dec 2014, which is more than five years old. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for PR0004545: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID PR0004545).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask PRASA – Aibonito la Plata at (787) 620-2277, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.