Sierra Vista, Arizona Water Quality Report
Water quality data for 14 water systems serving 56,688 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 20.2 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 202% | Above guideline |
| PFBA | 0.007 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.020 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.011 | 0.010 ug/L | 0.001 ug/L(EWG) | 109% | Above limit |
| PFOA | 0.010 | 0.004 ug/L | 0.090 ug/L(EWG) | 250% | Above limit |
| PFOS | 0.041 | 0.004 ug/L | 0.300 ug/L(EWG) | 1023% | 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 (7)
71
Jul 1, 2025
71
Jul 1, 2025
75
Dec 20, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
Resolved Violations (493)
75
Dec 20, 2024
75
Dec 20, 2024
75
Dec 20, 2024
75
Dec 20, 2024
34
Dec 5, 2024
+ 488 more resolved violations
Frequently Asked Questions
Is Sierra Vista tap water safe to drink?
Sierra Vista'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 Sierra Vista tap water?
8 contaminants have been detected in Sierra Vista's water supply across 14 water systems. See the full contaminant table above for details.
How can I improve my water quality in Sierra Vista?
Install a water filter rated for the specific contaminants found in Sierra Vista's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Sierra Vista have any water quality violations?
Yes, Sierra Vista currently has 182 active violations. See the violations section above for details.