- EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
- Lithium: found in 5 of 40 samples, average 1.52 µg/L, highest 14.5 µg/L (EPA UCMR 5 testing, Nov 2023–Apr 2024)
- PFBS (a PFAS): found in 10 of 40 samples, average 1.3 ppt, highest 9.6 ppt (EPA UCMR 5 testing, Nov 2023–Apr 2024)
- PFHxS (a PFAS): found in 8 of 40 samples, average 1 ppt, highest 6.6 ppt (EPA UCMR 5 testing, Nov 2023–Apr 2024)
- PFOS (a PFAS): found in 1 of 40 samples, average 0.20 ppt, highest 6.1 ppt (EPA UCMR 5 testing, Nov 2023–Apr 2024)
- PFOA (a PFAS): found in 1 of 40 samples, average 0.10 ppt, highest 5.5 ppt (EPA UCMR 5 testing, Nov 2023–Apr 2024)
- Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2024–Dec 31, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Public EPA test results
Can you drink Big Bear Lake tap water? What EPA records show
EPA CA3610044 · serves San Bernardino County, CA · about 26,164 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Big Bear Lake DWP - Big Bear System (EPA CA3610044)
EPA data as of October 14, 2026. For Big Bear Lake's main utility, Big Bear Lake DWP - Big Bear System: We found no health-based violations in EPA's records for this system (CA3610044) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
What EPA records show for Big Bear Lake DWP - Big Bear System, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CA3610044) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Big Bear Lake DWP - Big Bear System (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2024–Dec 31, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Big Bear Lake DWP - Big Bear System use chloramine?
We didn't find chloramine in Big Bear Lake DWP - Big Bear System's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.