Tustin, California Water Quality Report
Water quality data for 7 water systems serving 67,513 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 37.9 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 379% | Above guideline |
| PFHxS | 0.004 | 0.010 ug/L | 0.001 ug/L(EWG) | 35% | Within limit |
| PFOS | 0.004 | 0.004 ug/L | 0.300 ug/L(EWG) | 105% | 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 (29)
52
Oct 1, 2024
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Resolved Violations (82)
71
Jul 1, 2025
71
Jul 1, 2025
27
Jan 1, 2023 — Dec 31, 2025
27
Jan 1, 2023 — Dec 31, 2025
3A
Jul 1, 2022 — Jul 31, 2022
+ 77 more resolved violations
Frequently Asked Questions
Is Tustin tap water safe to drink?
Tustin's water has 1 contaminant detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Tustin tap water?
4 contaminants have been detected in Tustin's water supply across 7 water systems. See the full contaminant table above for details.
How can I improve my water quality in Tustin?
Install a water filter rated for the specific contaminants found in Tustin's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Tustin have any water quality violations?
Yes, Tustin currently has 29 active violations. See the violations section above for details.