TapWaterMap

CA / Los Altos

CA · Tap water records

Los Altos tap water, in plain English

Here is what the EPA's own data shows about tap water in Los Altos. According to EPA SDWIS data retrieved June 2026, Los Altos is served by 3 active community water systems, together reported to serve about 579 people.

As of June 2026, EPA records show 6 violations across the community water system(s) serving Los Altos, 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

Fairplay Mhp

215 served · groundwater · PWSID CO0147030

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Villa Cerezos

200 served · groundwater · PWSID CA3900596

Greeley Rv Park

164 served · groundwater · PWSID CO0162302

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

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.