Public EPA test results
Can you drink Riverbank tap water? What EPA records show
EPA CA5010018 · serves Riverbank, CA · about 25,625 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
Riverbank, City of (EPA CA5010018)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Riverbank's main utility, Riverbank, City of: 1 health-based violation since July 1, 2021 in EPA records (EPA SDWIS). PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
What EPA records show for Riverbank, City of, as of October 14, 2026
Health-based violation: Inorganic Chemicals, Nitrate, Nov 2021–Oct 2023 (EPA SDWIS).
Lead, 90th percentile: 21 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, above 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 none.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
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 Riverbank, City of use chloramine?
We didn't find chloramine in Riverbank, City of's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)