Norristown, Pennsylvania Water Quality Report
Water quality data for 9 water systems serving 99,247 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 24.5 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 245% | Above guideline |
| PFBA | 0.007 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.005 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHpA | 0.008 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.012 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.005 | 0.010 ug/L | 0.001 ug/L(EWG) | 50% | Within limit |
| PFNA | 0.007 | 0.010 ug/L | — | 66% | Within limit |
| PFOA | 0.031 | 0.004 ug/L | 0.090 ug/L(EWG) | 770% | Above limit |
| PFOS | 0.058 | 0.004 ug/L | 0.300 ug/L(EWG) | 1448% | Above limit |
| PFPeA | 0.013 | 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
Get a Free Water Quality Consultation
Connect with a certified water treatment professional in Norristown, Pennsylvania.
Get Water Quality Alerts
Be the first to know when water quality changes in Norristown.
Compliance & Violations
Active Violations (4)
52
Oct 1, 2025
52
Oct 1, 2025
34
Oct 19, 2024
34
Oct 19, 2024
Resolved Violations (496)
31
Aug 1, 2025 — Aug 31, 2025
31
Aug 1, 2025 — Aug 31, 2025
27
Aug 1, 2025 — Aug 31, 2025
27
Aug 1, 2025 — Aug 31, 2025
31
Jul 1, 2025 — Jul 31, 2025
+ 491 more resolved violations
Frequently Asked Questions
Is Norristown tap water safe to drink?
Norristown'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 Norristown tap water?
10 contaminants have been detected in Norristown's water supply across 9 water systems. See the full contaminant table above for details.
How can I improve my water quality in Norristown?
Install a water filter rated for the specific contaminants found in Norristown's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Norristown have any water quality violations?
Yes, Norristown currently has 51 active violations. See the violations section above for details.