- EPA's UCMR 5 testing looked for 30 contaminants here and found 9.
- Lithium: found in 17 of 26 samples, average 20.6 µg/L, highest 57.5 µg/L (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- PFBS (a PFAS): found in 3 of 26 samples, average 1 ppt, highest 13.2 ppt (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- PFPeA (a PFAS): found in 2 of 26 samples, average 0.70 ppt, highest 9.2 ppt (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- PFHxA (a PFAS): found in 2 of 26 samples, average 0.60 ppt, highest 9.3 ppt (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- PFHxS (a PFAS): found in 2 of 26 samples, average 0.60 ppt, highest 8.7 ppt (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- PFOA (a PFAS): found in 2 of 26 samples, average 0.50 ppt, highest 8.1 ppt (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- PFOS (a PFAS): found in 2 of 26 samples, average 0.50 ppt, highest 7.3 ppt (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- PFHpA (a PFAS): found in 2 of 26 samples, average 0.30 ppt, highest 3.6 ppt (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- PFBA (a PFAS): found in 1 of 26 samples, average 0.20 ppt, highest 5 ppt (EPA UCMR 5 testing, Feb 2023–Dec 2023)
- Lead, 90th percentile: 1 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, 2026–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 Monterey tap water? What EPA records show
EPA CA2710004 · serves Monterey County, CA · about 128,928 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
Cal Am Water Company - Monterey (EPA CA2710004)
EPA data as of October 14, 2026. For Monterey's main utility, Cal Am Water Company - Monterey: We found no health-based violations in EPA's records for this system (CA2710004) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 9. This is public data, not a test of your tap.
What EPA records show for Cal Am Water Company - Monterey, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CA2710004) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Cal Am Water Company - Monterey (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 1 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, 2026–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 9.
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 Cal Am Water Company - Monterey use chloramine?
We didn't find chloramine in Cal Am Water Company - Monterey's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.