El Monte, California Water Quality Report
Water quality data for 10 water systems serving 289,946 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 54.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 540% | Above guideline |
| PFBA | 0.010 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.003 | 0.010 ug/L | 0.001 ug/L(EWG) | 32% | Within limit |
| PFOS | 0.004 | 0.004 ug/L | 0.300 ug/L(EWG) | 110% | Above limit |
| PFPeA | 0.006 | 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 (30)
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
76
Jul 1, 2024
76
Jan 1, 2024
52
Oct 27, 2023
76
Oct 1, 2023
76
Jul 1, 2023
52
Oct 1, 2022
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Resolved Violations (263)
02
Jul 1, 2025 — Sep 30, 2025
02
Apr 1, 2025 — Jun 30, 2025
02
Jan 1, 2025 — Mar 31, 2025
02
Oct 1, 2024 — Dec 31, 2024
02
Jul 1, 2024 — Sep 30, 2024
+ 258 more resolved violations
Frequently Asked Questions
Is El Monte tap water safe to drink?
El Monte'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 El Monte tap water?
5 contaminants have been detected in El Monte's water supply across 10 water systems. See the full contaminant table above for details.
How can I improve my water quality in El Monte?
Install a water filter rated for the specific contaminants found in El Monte's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does El Monte have any water quality violations?
Yes, El Monte currently has 30 active violations. See the violations section above for details.