Los Osos, California Water Quality Report
Water quality data for 2 water systems serving 7,677 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 16.1 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 161% | Above guideline |
| PFBA | 0.006 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.018 | 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 | 0.017 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.008 | 0.010 ug/L | 0.001 ug/L(EWG) | 84% | Near limit |
| PFOA | 0.015 | 0.004 ug/L | 0.090 ug/L(EWG) | 368% | Above limit |
| PFOS | 0.012 | 0.004 ug/L | 0.300 ug/L(EWG) | 293% | Above limit |
| PFPeA | 0.017 | 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
Resolved Violations (6)
52
Oct 1, 2019
52
Oct 1, 2019
51
Jun 30, 1993 — Apr 4, 2000
03
Oct 1, 1981 — Sep 30, 1982
03
Oct 30, 1980 — Oct 29, 1981
+ 1 more resolved violations
Frequently Asked Questions
Is Los Osos tap water safe to drink?
Los Osos'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 Los Osos tap water?
9 contaminants have been detected in Los Osos's water supply across 2 water systems. See the full contaminant table above for details.
How can I improve my water quality in Los Osos?
Install a water filter rated for the specific contaminants found in Los Osos's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.