Home/ Directory/ CA/ RAINBOW MUNICIPAL WD

Water system · PWSID CA3710016

RAINBOW MUNICIPAL WD

FALLBROOK, CA · ~23,536 people served

Check your exact address → FALLBROOK overview
100
Excellent
PurityRadar safety score

PWSID

CA3710016

State

California

City

FALLBROOK

Population served

23,536

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

Lithium

41,000 ppt

limit —

No federal limit

Violations & enforcement

4

Violations on record

0

Unaddressed

3

Health-based

12

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2012. Official EPA record →

Other began Jan 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2003 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1993 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1993 Resolved

Recent enforcement actions

  • State action · SOX Dec 2012
  • State action · SFL Mar 2010
  • State action · SFL Mar 2007
  • State action · SO8 Dec 2005
  • State action · SFO Dec 2005
  • State action · SO8 Oct 2005
  • State action · SFO Aug 2005
  • State action · SFL Apr 2004

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

Nitrate

4 stations · latest Apr 2022

20 · max 32.9 mg/l as N · 22

Fluoride

5 stations · latest Apr 2022

0.565 · max 0.89 mg/l · 14

Manganese

5 stations · latest Apr 2022

152 · max 554 ug/l · 14

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 CA3710016 — 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.