CA / Claremont
CA · Tap water records
Claremont tap water, in plain English
Here is what the EPA's own data shows about tap water in Claremont. According to EPA SDWIS data retrieved June 2026, Claremont is served by 3 active community water systems, together reported to serve about 1,789 people.
As of June 2026, EPA records show 11 violations across the community water system(s) serving Claremont, going back to the earliest EPA record. None were health-based; the records are monitoring or reporting violations (a required test or report was late or missed). Each is listed by system below, with its status.
What the EPA has on record, by system
Sonora Water Resources, Inc
1,154 served · surface water · PWSID CA5510024 - Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times between July 1993 and January 2006. All have since returned to compliance, per EPA records.
Sierra Water Resources - Sierra City
324 served · groundwater · PWSID CA4600017 - Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in August 2017. All have since returned to compliance, per EPA records.
- Monitoring contaminant code null: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between November 2015 and June 2016. All have since returned to compliance, per EPA records.
Owens Valley Water Resources, Inc.
311 served · groundwater · PWSID CA1400005 - Monitoring Coliform (TCR): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2016 and February 2016. All have since returned to compliance, per EPA records.
- Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 1993. All have since returned to compliance, per EPA records.
What this means
A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.
This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.
Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.