San Ramon, California Water Quality Report
Water quality data for 2 water systems serving 160 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
Get a Free Water Quality Consultation
Connect with a certified water treatment professional in San Ramon, California.
Get Water Quality Alerts
Be the first to know when water quality changes in San Ramon.
Compliance & Violations
Active Violations (6)
71
Jul 1, 2025
2E
Oct 17, 2024
4G
Oct 17, 2024
52
Oct 1, 2023
Violation
Unknown
Violation
Unknown
Resolved Violations (108)
02
Apr 1, 2025 — Jun 30, 2025
02
Jan 1, 2025 — Mar 31, 2025
01
Oct 1, 2024 — Dec 31, 2024
03
Jul 1, 2024 — Sep 30, 2024
03
Apr 1, 2024 — Jun 30, 2024
+ 103 more resolved violations
Frequently Asked Questions
Is San Ramon tap water safe to drink?
San Ramon's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in San Ramon tap water?
0 contaminants have been detected in San Ramon's water supply across 2 water systems. See the full contaminant table above for details.
How can I improve my water quality in San Ramon?
Install a water filter rated for the specific contaminants found in San Ramon's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does San Ramon have any water quality violations?
Yes, San Ramon currently has 6 active violations. See the violations section above for details.