Cary, North Carolina Water Quality Report
Water quality data for 724 water systems serving 441,591 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| HFPO-DA | 0.008 | 0.010 ug/L | — | 84% | Near limit |
| lithium | 17.5 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 175% | Above guideline |
| PFBA | 0.018 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.063 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHpA | 0.014 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.057 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.153 | 0.010 ug/L | 0.001 ug/L(EWG) | 1526% | Above limit |
| PFOA | 0.028 | 0.004 ug/L | 0.090 ug/L(EWG) | 688% | Above limit |
| PFOS | 0.033 | 0.004 ug/L | 0.300 ug/L(EWG) | 833% | Above limit |
| PFPeA | 0.059 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeS | 0.036 | 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
Get a Free Water Quality Consultation
Connect with a certified water treatment professional in Cary, North Carolina.
Get Water Quality Alerts
Be the first to know when water quality changes in Cary.
Compliance & Violations
Active Violations (45)
75
Sep 21, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
75
Jun 16, 2025
75
Jun 16, 2025
75
Jun 16, 2025
75
Jun 16, 2025
35
Apr 14, 2025
66
Apr 1, 2025
66
Apr 1, 2025
52
Jan 1, 2025
52
Jan 1, 2025
52
Jan 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
4G
Oct 17, 2024
2E
Oct 17, 2024
72
Oct 1, 2024
72
Oct 1, 2024
72
Oct 1, 2024
72
Oct 1, 2024
Resolved Violations (955)
75
Aug 20, 2025
75
Aug 10, 2025
75
Jul 6, 2025
71
Jul 1, 2025
71
Jul 1, 2025
+ 950 more resolved violations
Frequently Asked Questions
Is Cary tap water safe to drink?
Cary'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 Cary tap water?
11 contaminants have been detected in Cary's water supply across 724 water systems. See the full contaminant table above for details.
How can I improve my water quality in Cary?
Install a water filter rated for the specific contaminants found in Cary's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Cary have any water quality violations?
Yes, Cary currently has 4946 active violations. See the violations section above for details.