- EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
- Lithium: found in 4 of 4 samples, average 53 µg/L, highest 59 µg/L (EPA UCMR 5 testing, Jan 2024–Oct 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.
- Health-based violation: Lead and Copper Rule, LEAD AND COPPER RULE REVISIONS, from Oct 2024, with no return-to-compliance action in EPA records (EPA SDWIS)
Public EPA test results
Can you drink Calexico tap water? What EPA records show
EPA CA1310002 · serves Calexico, CA · about 40,357 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
Calexico, City of (EPA CA1310002)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Calexico's main utility, Calexico, 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 Calexico, City of, as of October 14, 2026
Health-based violation: Lead and Copper Rule, LEAD AND COPPER RULE REVISIONS, from Oct 2024, with no return-to-compliance action in EPA records (EPA SDWIS).
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 1.
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 Calexico, City of use chloramine?
EPA treatment records (state-reported) list chloramines for Calexico, City of. EPA record
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)