CALEXICO, CITY OF

CALEXICO, CA · ~40,357 people served

Check your exact address → CALEXICO overview

Excellent

PurityRadar safety score

PWSID

CA1310002

State

California

City

CALEXICO

Population served

40,357

Primary source

SWP

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 85 Jun 18, 2026 · score 85

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 Oct 2024). Levels in parts per trillion (ppt).

Lithium

59,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2020. Official EPA record →

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2019 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2014 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2003 Resolved

Recent enforcement actions

State action · SOX Sep 2020
State action · SOX Dec 2019
State action · SFL Nov 2019
State action · SOX Jun 2015
State action · SFL Oct 2014
State action · SOX Sep 2003
State action · SIA Aug 2003
State action · SIA Oct 2002

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Arsenic

1 station · latest Nov 2021

21.1 · max 35 ug/L · 2

Fluoride

1 station · latest Jan 2020

0.0261 · max 0.0261 mg/L · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CA1310002 — 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.