Does Pismo Beach, CA tap water have any EPA-reported violations?

As of June 2026, EPA SDWIS records show 13 violation(s) across the community water systems serving Pismo Beach, of which 10 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Pismo Beach, CA tap water come from?

Pismo Beach is served by 2 active community water system(s). Their primary sources, per EPA records, are: surface water, groundwater.

CA / Pismo Beach

CA · Tap water records

Pismo Beach tap water, in plain English

Here is what the EPA's own data shows about tap water in Pismo Beach. According to EPA SDWIS data retrieved June 2026, Pismo Beach is served by 2 active community water systems, together reported to serve about 8,636 people.

As of June 2026, EPA records show 13 violations across the community water system(s) serving Pismo Beach, going back to the earliest EPA record. 10 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.

2

Community water systems
~8,636

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

Pismo Beach Water Department

8,036 served · surface water · PWSID CA4010008

Health-based Total Haloacetic Acids (HAA5): a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 10 times between July 2023 and January 2024. The EPA record lists a level of 0.063 MG/L; the limit (MCL) is 0.06 MG/L. EPA records do not show all of these as returned to compliance.
Monitoring Nitrate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times in January 2023. EPA records do not show all of these as returned to compliance.

Preserve At Millerton Lake Water System

600 served · groundwater · PWSID CA2010018

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.