CA / Wishon
CA · Tap water records
Wishon tap water, in plain English
Here is what the EPA's own data shows about tap water in Wishon. According to EPA SDWIS data retrieved June 2026, Wishon is served by 1 active community water system, together reported to serve about 42 people.
As of June 2026, EPA records show 24 violations across the community water system(s) serving Wishon, going back to the earliest EPA record. 21 of these are classified by the EPA as health-based (a contaminant recorded above the limit the EPA tracks); the rest are monitoring or reporting violations. Each is listed by system below, with its status.
What the EPA has on record, by system
Bass Lake Annex 3
42 served · groundwater · PWSID CA2000501 - Health-based Combined Uranium: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 20 times between July 2002 and July 2025. The EPA record lists a level of 42.3 PCI/L; the limit (MCL) is 20 PCI/L. EPA records do not show all of these as returned to compliance.
- Health-based Revised Total Coliform Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in June 2017. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
- Monitoring CHROMIUM, HEX: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in October 2024. EPA records do not show all of these as returned to compliance.
- Monitoring Coliform (TCR): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in February 2016. 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.