City of Hollister

Surface water · Local · 1321 South St.

Overall Risk Level

Moderate Concern

No Concern

Low

Moderate

High

Critical

Contaminants detected within limits but elevated. Consider filtration.

Utility Overview

Population Served

26,017

Source Type

Surface water

Ownership

Local

PWSID

CA3510001

Detected Contaminants

CCR data ingestion in progress

Contaminant detection levels from Consumer Confidence Reports are being parsed and linked to utilities. Check back soon, or view the official report directly from the EPA links below.

View on EPA ECHO

Violation History

Sourced from EPA SDWIS. Health-based violations mean a contaminant exceeded the legal limit. Monitoring/Reporting violations mean required test results were not submitted to EPA — not necessarily that the water is unsafe.

MR — Haloacetic Acids (HAA5)

Open

Apr 2024Monitoring/Reporting failure

MR — Total Trihalomethanes (TTHMs)

Open

Apr 2024Monitoring/Reporting failure

MCL Violation — Haloacetic Acids (HAA5)

Resolved

Jul 2022 – Jan 2023Health-based

MCL Violation — Haloacetic Acids (HAA5)

Resolved

Oct 2018 – Jan 2019Health-based