San Antonio, Texas Water Quality Report
Water quality data for 83 water systems serving 2,194,771 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 60.3 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 603% | Above guideline |
| PFBA | 0.009 | 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 |
| PFPeA | 0.003 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFOS | 0.004 | 0.004 ug/L | 0.300 ug/L(EWG) | 100% | Near 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
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Connect with a certified water treatment professional in San Antonio, Texas.
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Compliance & Violations
Active Violations (34)
75
May 1, 2025
75
May 1, 2025
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
71
Jul 1, 2024
52
Jul 1, 2024
52
Jul 1, 2024
34
Sep 1, 2010
34
Sep 1, 2010
34
Sep 1, 2010
Resolved Violations (966)
3A
Jun 1, 2025 — Jun 30, 2025
3A
Jun 1, 2025 — Jun 30, 2025
3A
May 1, 2025 — May 31, 2025
3A
May 1, 2025 — May 31, 2025
75
May 1, 2025
+ 961 more resolved violations
Frequently Asked Questions
Is San Antonio tap water safe to drink?
San Antonio's water meets all EPA maximum contaminant levels. However, 5 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in San Antonio tap water?
5 contaminants have been detected in San Antonio's water supply across 83 water systems. See the full contaminant table above for details.
How can I improve my water quality in San Antonio?
Install a water filter rated for the specific contaminants found in San Antonio's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does San Antonio have any water quality violations?
Yes, San Antonio currently has 671 active violations. See the violations section above for details.