GREEN MOUNTAIN WATER COMPANY

MORGAN HILL, CA · ~80 people served

Check your exact address → MORGAN HILL overview

100

Excellent

PurityRadar safety score

PWSID

CA4300560

State

California

City

MORGAN HILL

Population served

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2024. Official EPA record →

Monitoring & reporting · Nitrate began Jan 2023 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2020 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2003 Resolved

Max contaminant level (MCL) · Total coliform health-based began Nov 1999 Resolved

Monitoring & reporting · Total coliform began Oct 1995 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

State action · SOX Mar 2024
State action · SFL Feb 2024
State action · SOX Jun 2020
State action · SFL Apr 2020
State action · SOX Jan 2019
State action · SIA Aug 2003
EPA/federal action · EOX Mar 2000
State action · SOX Dec 1999

This profile is built from EPA public records for system CA4300560 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.