San Juan, Puerto Rico Water Quality Report
Water quality data for 1 water system serving 1,077,332 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| 6:2 FTS | 0.049 | No federal limit | — | — | No federal limit |
| 8:2 FTS | 0.015 | No federal limit | — | — | No federal limit |
| PFBA | 0.009 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFDA | 0.007 | No federal limit | 0.006 ug/L(EWG) | 125% | Above guideline |
| PFHxA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFOA | 0.011 | 0.004 ug/L | 0.090 ug/L(EWG) | 273% | Above limit |
| PFOS | 0.008 | 0.004 ug/L | 0.300 ug/L(EWG) | 195% | Above limit |
| PFPeA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Resolved Violations (500)
36
Aug 1, 2025 — Aug 31, 2025
44
May 1, 2025 — May 31, 2025
43
May 1, 2025 — May 31, 2025
43
May 1, 2025 — May 31, 2025
43
Mar 1, 2025 — Mar 31, 2025
+ 495 more resolved violations
Frequently Asked Questions
Is San Juan tap water safe to drink?
San Juan's water has 2 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in San Juan tap water?
8 contaminants have been detected in San Juan's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in San Juan?
Install a water filter rated for the specific contaminants found in San Juan's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does San Juan have any water quality violations?
Yes, San Juan currently has 56 active violations. See the violations section above for details.