Mahwah, New Jersey Water Quality Report
Water quality data for 1 water system serving 26,777 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 33.1 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 331% | Above guideline |
| PFBA | 0.006 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.004 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHpA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.006 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFOA | 0.013 | 0.004 ug/L | 0.090 ug/L(EWG) | 313% | Above limit |
| PFOS | 0.004 | 0.004 ug/L | 0.300 ug/L(EWG) | 113% | Above limit |
| PFPeA | 0.006 | 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
Active Violations (12)
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Resolved Violations (42)
59
Jan 1, 2025 — Jun 30, 2025
53
Jul 1, 2020 — Dec 31, 2020
53
Jul 1, 2020 — Dec 31, 2020
53
Jan 1, 2020 — Jun 30, 2020
53
Jan 1, 2020 — Jun 30, 2020
+ 37 more resolved violations
Frequently Asked Questions
Is Mahwah tap water safe to drink?
Mahwah'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 Mahwah tap water?
8 contaminants have been detected in Mahwah's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in Mahwah?
Install a water filter rated for the specific contaminants found in Mahwah's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Mahwah have any water quality violations?
Yes, Mahwah currently has 12 active violations. See the violations section above for details.