Mangilao, Guam Water Quality Report
Water quality data for 3 water systems serving 166,406 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| 6:2 FTS | 0.148 | No federal limit | — | — | No federal limit |
| 8:2 FTS | 0.007 | No federal limit | — | — | No federal limit |
| PFBA | 0.018 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.035 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHpA | 0.018 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.037 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.080 | 0.010 ug/L | 0.001 ug/L(EWG) | 800% | Above limit |
| PFOA | 0.018 | 0.004 ug/L | 0.090 ug/L(EWG) | 458% | Above limit |
| PFOS | 0.135 | 0.004 ug/L | 0.300 ug/L(EWG) | 3375% | Above limit |
| PFPeA | 0.048 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeS | 0.010 | No federal limit | — | — | No federal limit |
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
Active Violations (22)
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Resolved Violations (138)
1A
Apr 1, 2022 — Apr 30, 2022
1A
Apr 1, 2022 — Apr 30, 2022
1A
Apr 1, 2022 — Apr 30, 2022
1A
Apr 1, 2022 — Apr 30, 2022
1A
Jan 1, 2018 — Jan 31, 2018
+ 133 more resolved violations
Frequently Asked Questions
Is Mangilao tap water safe to drink?
Mangilao's water has 3 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Mangilao tap water?
11 contaminants have been detected in Mangilao's water supply across 3 water systems. See the full contaminant table above for details.
How can I improve my water quality in Mangilao?
Install a water filter rated for the specific contaminants found in Mangilao's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Mangilao have any water quality violations?
Yes, Mangilao currently has 22 active violations. See the violations section above for details.