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Water system · PWSID CA3710004

DEL MAR, CITY OF

DEL MAR, CA · ~3,919 people served

Check your exact address → DEL MAR overview
100
Excellent
PurityRadar safety score

PWSID

CA3710004

State

California

City

DEL MAR

Population served

3,919

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 Oct 2025). Levels in parts per trillion (ppt).

Lithium

31,400 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

2

Health-based

10

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2022. Official EPA record →

Monitoring · Lead & Copper Rule began May 2022 Resolved
Monitoring & reporting · Total coliform began Nov 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 1999 Resolved
Monitoring & reporting · Lead & Copper Rule began Jun 1993 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 1993 Resolved

Recent enforcement actions

  • State action · SOX Jul 2022
  • State action · SFL Jun 2022
  • State action · SOX Dec 2002
  • State action · SFJ Nov 2002
  • State action · SOX Nov 2002
  • EPA/federal action · EOX Mar 2000
  • State action · SOX Dec 1999
  • State action · SFJ Dec 1999

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

Copper

2 stations · latest Jun 2021

62.5 · max 92 ug/L · 4

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 CA3710004 — 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.