South Lake Tahoe, California Water Quality Report
Water quality data for 7 water systems serving 107,415 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 26.3 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 263% | Above guideline |
| PFBA | 0.005 | 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 |
| PFHpA | 0.006 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.016 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.006 | 0.010 ug/L | 0.001 ug/L(EWG) | 58% | Within limit |
| PFOA | 0.006 | 0.004 ug/L | 0.090 ug/L(EWG) | 153% | Above limit |
| PFOS | 0.005 | 0.004 ug/L | 0.300 ug/L(EWG) | 130% | Above limit |
| PFPeA | 0.022 | 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 (17)
4H
Jul 2, 2025
2E
Oct 17, 2024
4G
Oct 17, 2024
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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 (73)
03
Sep 1, 2024 — Dec 1, 2024
03
Sep 1, 2024 — Dec 1, 2024
03
Sep 1, 2024 — Dec 1, 2024
03
Sep 1, 2024 — Dec 1, 2024
03
Sep 1, 2024 — Dec 1, 2024
+ 68 more resolved violations
Frequently Asked Questions
Is South Lake Tahoe tap water safe to drink?
South Lake Tahoe'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 South Lake Tahoe tap water?
9 contaminants have been detected in South Lake Tahoe's water supply across 7 water systems. See the full contaminant table above for details.
How can I improve my water quality in South Lake Tahoe?
Install a water filter rated for the specific contaminants found in South Lake Tahoe's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does South Lake Tahoe have any water quality violations?
Yes, South Lake Tahoe currently has 17 active violations. See the violations section above for details.