Williamsport, Pennsylvania Water Quality Report
Water quality data for 5 water systems serving 51,788 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 45.6 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 456% | Above guideline |
| PFHxA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.004 | 0.010 ug/L | 0.001 ug/L(EWG) | 36% | Within limit |
| PFNA | 0.010 | 0.010 ug/L | — | 97% | Near limit |
| PFOS | 0.005 | 0.004 ug/L | 0.300 ug/L(EWG) | 128% | 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
Active Violations (3)
2B
May 11, 2025
2B
May 11, 2025
2B
May 11, 2025
Resolved Violations (497)
03
Jul 1, 2025 — Sep 30, 2025
03
Jul 1, 2025 — Sep 30, 2025
03
Jul 1, 2025 — Sep 30, 2025
03
Jul 1, 2025 — Sep 30, 2025
03
Jul 1, 2025 — Sep 30, 2025
+ 492 more resolved violations
Frequently Asked Questions
Is Williamsport tap water safe to drink?
Williamsport's water has 1 contaminant detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Williamsport tap water?
6 contaminants have been detected in Williamsport's water supply across 5 water systems. See the full contaminant table above for details.
How can I improve my water quality in Williamsport?
Install a water filter rated for the specific contaminants found in Williamsport's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Williamsport have any water quality violations?
Yes, Williamsport currently has 99 active violations. See the violations section above for details.