Houston, Texas Water Quality Report
Water quality data for 806 water systems serving 5,972,677 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| 6:2 FTS | 0.104 | No federal limit | — | — | No federal limit |
| lithium | 162.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 1620% | Above guideline |
| PFBA | 0.050 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.009 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHpA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.011 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.015 | 0.010 ug/L | 0.001 ug/L(EWG) | 153% | Above limit |
| PFOA | 0.004 | 0.004 ug/L | 0.090 ug/L(EWG) | 100% | Near limit |
| PFOS | 0.010 | 0.004 ug/L | 0.300 ug/L(EWG) | 242% | Above limit |
| PFPeA | 0.194 | 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 (186)
72
Oct 1, 2025
66
Sep 29, 2025
66
Sep 29, 2025
66
Sep 29, 2025
66
Sep 29, 2025
75
Sep 13, 2025
75
Sep 13, 2025
75
Aug 31, 2025
75
Aug 28, 2025
75
Aug 28, 2025
75
Aug 28, 2025
75
Aug 28, 2025
75
Aug 28, 2025
75
Aug 11, 2025
75
Aug 11, 2025
75
Aug 8, 2025
75
Aug 8, 2025
75
Jul 31, 2025
75
Jul 24, 2025
75
Jul 24, 2025
75
Jul 24, 2025
75
Jul 24, 2025
34
Jul 4, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
71
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
51
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
51
Jul 1, 2025
75
May 15, 2025
75
May 15, 2025
75
May 15, 2025
75
May 15, 2025
75
May 15, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
May 1, 2025
75
Apr 28, 2025
75
Apr 28, 2025
75
Apr 28, 2025
75
Apr 28, 2025
75
Apr 28, 2025
75
Apr 10, 2025
75
Apr 10, 2025
66
Apr 1, 2025
75
Mar 29, 2025
75
Mar 29, 2025
75
Mar 13, 2025
75
Mar 10, 2025
75
Mar 10, 2025
75
Mar 1, 2025
75
Feb 22, 2025
75
Feb 3, 2025
42
Feb 1, 2025
42
Feb 1, 2025
42
Feb 1, 2025
34
Jan 20, 2025
34
Jan 20, 2025
52
Jan 1, 2025
52
Jan 1, 2025
52
Jan 1, 2025
52
Jan 1, 2025
52
Jan 1, 2025
52
Jan 1, 2025
75
Dec 12, 2024
75
Dec 12, 2024
75
Dec 7, 2024
75
Dec 7, 2024
75
Oct 19, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
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
4G
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
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
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
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
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
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
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
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
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
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
4G
Oct 17, 2024
52
Oct 1, 2024
52
Oct 1, 2024
75
Oct 1, 2024
75
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
72
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
75
Oct 1, 2024
66
Sep 29, 2024
66
Sep 29, 2024
75
Aug 29, 2024
75
Aug 29, 2024
34
Aug 28, 2024
34
Aug 28, 2024
34
Aug 28, 2024
75
Aug 18, 2024
Resolved Violations (814)
3A
Nov 1, 2025 — Nov 30, 2025
3A
Nov 1, 2025 — Nov 30, 2025
3A
Oct 1, 2025 — Oct 31, 2025
3A
Oct 1, 2025 — Oct 31, 2025
3A
Sep 1, 2025 — Sep 30, 2025
+ 809 more resolved violations
Frequently Asked Questions
Is Houston tap water safe to drink?
Houston'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 Houston tap water?
10 contaminants have been detected in Houston's water supply across 806 water systems. See the full contaminant table above for details.
How can I improve my water quality in Houston?
Install a water filter rated for the specific contaminants found in Houston's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Houston have any water quality violations?
Yes, Houston currently has 2307 active violations. See the violations section above for details.