01The verdict: is Vega Alta water safe?
Vega Alta's drinking water has significant quality concerns based on EPA testing data. With a grade of B- (74.7/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 2,344 residents using surface water (rivers, lakes, or reservoirs).
Chlorate is over its legal limit
Measured at 870.0 µg/L against the EPA Lifetime HA of 210 µg/L. The ledger below shows how far over — and which filter removes it.
See the measurement ↓Monitoring is on schedule
The system is meeting its EPA monitoring and reporting requirements — testing is happening when it should.
See the score ↓3 violations in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Vega Alta's drinking water received a grade of B- (74.7 out of 100), indicating fair water quality. The city's 1 water system serves approximately 2,344 residents using surface water.
Lead levels were measured at 6.0 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 221 violations on record, including 28 health-based violations. 8 remain unresolved.
Vega Alta ranks #18 out of 101 cities in Puerto Rico for water quality, placing it above average in the state. The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection. Haloacetic acid (HAA5) levels were elevated at 36.7 µg/L in UCMR 4 testing, though below the 60 µg/L EPA limit. Activated carbon filtration can help reduce these disinfection byproducts. While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection. As a small community water system, Vega Alta may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Vega Alta's water
Every contaminant flagged in Vega Alta, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 6.0 | 15 | ppb | Inorganic | Safe |
03Vega Alta's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 221 violations on record, including 28 health-based violations. 8 remain unresolved.
5 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▼ Down 3 ppb since 1993. Latest reading: 6 ppb (2015) — 40% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Vega Alta's water comes from
Vega Alta's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Local treatment
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
1 system
1 water system, operated under local government ownership.
2,344 people
Residents served across Vega Alta's service area.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards. These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge. The system is operated by local government ownership and serves approximately 2,344 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| SABANA HOYOS | PR0005587 | 2,344 | Surface Water |
Water bodies near Vega Alta
As a surface-water system, these water bodies may directly influence Vega Alta's drinking water supply.
05How Vega Alta compares
Scores for nearby Puerto Rico cities on one line, with the average marked.
dashed line = Puerto Rico average (39/100)
Vega Alta scores 74.7/100 — above the Puerto Rico average of 39/100. It outscores 10 of 10 nearby cities.
38.5 / 100FToa Alta, PR
38.5 / 100FMayaguez, PR
42.1 / 100FPonce, PR
34.9 / 100FAguadilla, PR
38.3 / 100FRincon, PR
38.3 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
06What to do at home
Steps matched to what testing actually found in Vega Alta's water — not generic advice.
Filter drinking & cooking water
NSF-certified water filter. Lead detected at 6.0 ppb
Compare tested filters →Flush taps & check your service line
Lead leaches from pipes as water sits. Run cold water 30 seconds before drinking (especially mornings), and ask the utility whether your address still has a lead service line.
Lead risks explained →Watch for Vega Alta alerts
We refresh EPA data monthly and surface new violations, advisories, and boil-water notices for your county on this page.
All water alerts →Frequently asked questions
Is Vega Alta, PR tap water safe to drink?
Vega Alta's water quality earned a grade of B- (74.7/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #18 out of 101 cities tested in Puerto Rico.
What contaminants are in Vega Alta's water?
Lead was measured at 6.0 ppb (90th percentile). 221 violations are on record.
How is Vega Alta's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Vega Alta?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Vega Alta's water come from?
Vega Alta's water is sourced from Surface water. The city has 1 water system serving approximately 2,344 residents.
What health violations has Vega Alta's water system had?
Vega Alta has 28 health-based violations on record. The most recent violation was recorded in July 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 8 violations remain unresolved.
How does Vega Alta's water compare to other cities?
Vega Alta ranks #18 out of 101 cities in Puerto Rico (better than 82% of state cities) and #9652 out of 15382 cities nationally (37th percentile). The grade of B- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Vega Alta's small water system affect quality?
Vega Alta's system serves approximately 2,344 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 221 violations on record.