- EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
- PFHxS (a PFAS): found in 8 of 42 samples, average 1 ppt, highest 10.9 ppt (EPA UCMR 5 testing, Mar 2023–Nov 2024)
- PFOS (a PFAS): found in 3 of 42 samples, average 0.70 ppt, highest 13.4 ppt (EPA UCMR 5 testing, Mar 2023–Nov 2024)
- PFPeA (a PFAS): found in 3 of 42 samples, average 0.50 ppt, highest 7.7 ppt (EPA UCMR 5 testing, Mar 2023–Nov 2024)
- PFHxA (a PFAS): found in 4 of 42 samples, average 0.40 ppt, highest 5.4 ppt (EPA UCMR 5 testing, Mar 2023–Nov 2024)
- PFBA (a PFAS): found in 1 of 42 samples, average 0.20 ppt, highest 9 ppt (EPA UCMR 5 testing, Mar 2023–Nov 2024)
- PFOA (a PFAS): found in 1 of 42 samples, average 0.20 ppt, highest 8.2 ppt (EPA UCMR 5 testing, Mar 2023–Nov 2024)
- PFHpA (a PFAS): found in 2 of 42 samples, average 0.20 ppt, highest 4.7 ppt (EPA UCMR 5 testing, Mar 2023–Nov 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, 2023–Dec 31, 2025). 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 Rosemont tap water? What EPA records show
EPA CA3410010 · serves Sacramento County, CA · about 54,893 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 - Suburban Rosemont (EPA CA3410010)
EPA data as of October 14, 2026. For Rosemont's main utility, Cal Am - Suburban Rosemont: We found no health-based violations in EPA's records for this system (CA3410010) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 7. This is public data, not a test of your tap.
What EPA records show for Cal Am - Suburban Rosemont, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CA3410010) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Cal Am - Suburban Rosemont (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, 2023–Dec 31, 2025). 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 7.
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 - Suburban Rosemont use chloramine?
We didn't find chloramine in Cal Am - Suburban Rosemont's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.