Atascadero, California Water Quality Report
Water quality data for 3 water systems serving 35,158 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 20.7 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 207% | Above guideline |
| PFBA | 0.010 | 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 |
| PFHxA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.034 | 0.010 ug/L | 0.001 ug/L(EWG) | 340% | Above limit |
| PFOA | 0.008 | 0.004 ug/L | 0.090 ug/L(EWG) | 210% | Above limit |
| PFOS | 0.033 | 0.004 ug/L | 0.300 ug/L(EWG) | 825% | Above limit |
| PFPeS | 0.006 | No federal limit | — | — | No federal limit |
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
Get a Free Water Quality Consultation
Connect with a certified water treatment professional in Atascadero, California.
Get Water Quality Alerts
Be the first to know when water quality changes in Atascadero.
Compliance & Violations
Active Violations (1)
Violation
Unknown
Resolved Violations (21)
03
Jan 1, 2023 — Dec 31, 2023
03
Jan 1, 2023 — Dec 31, 2023
03
Feb 1, 2022 — Feb 28, 2022
03
Feb 1, 2022 — Feb 28, 2022
52
Oct 1, 2017
+ 16 more resolved violations
Frequently Asked Questions
Is Atascadero tap water safe to drink?
Atascadero's water has 3 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Atascadero tap water?
8 contaminants have been detected in Atascadero's water supply across 3 water systems. See the full contaminant table above for details.
How can I improve my water quality in Atascadero?
Install a water filter rated for the specific contaminants found in Atascadero's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Atascadero have any water quality violations?
Yes, Atascadero currently has 1 active violation. See the violations section above for details.