CITY OF MOUNTAIN VIEW

MOUNTAIN VIEW, CA · ~81,501 people served

Check your exact address → MOUNTAIN VIEW overview

100

Excellent

PurityRadar safety score

PWSID

CA4310007

State

California

City

MOUNTAIN VIEW

Population served

81,501

Primary source

SWP

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

Latest detections from EPA’s UCMR5 monitoring (through Mar 2023). Levels in parts per trillion (ppt).

Lithium

9,300 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2018. Official EPA record →

Treatment technique · EPA contaminant 0200 health-based began Mar 2015 Resolved

Monitoring & reporting · EPA contaminant 3014 began Jul 2013 Resolved

Monitoring & reporting · Fluoride began May 2001 Resolved

Monitoring & reporting · Fluoride began Mar 2001 Resolved

Treatment technique · EPA contaminant 0200 health-based began Mar 1995 Resolved

Treatment technique · EPA contaminant 0200 health-based began Mar 1992 Resolved

Recent enforcement actions

State action · SOX Feb 2018
State action · SOX Oct 2017
State action · SOX Feb 2017
State action · SFL Apr 2015
State action · SFL Aug 2013
State action · SOX Dec 2001
State action · SFL Jun 2001
State action · SFL Apr 2001

This profile is built from EPA public records for system CA4310007 — 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.