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Water system · PWSID IL0990300

LA SALLE

LA SALLE, IL · ~9,700 people served

Check your exact address → LA SALLE overview
100
Excellent
PurityRadar safety score

PWSID

IL0990300

State

Illinois

City

LA SALLE

Population served

9,700

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2025). Levels in parts per trillion (ppt).

Lithium

20,000 ppt

limit —

No federal limit

PFBA

6.7 ppt

limit —

No federal limit

PFBS

3.1 ppt

limit —

No federal limit

Violations & enforcement

49

Violations on record

0

Unaddressed

6

Health-based

81

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2025. Official EPA record →

Monitoring · Lead & Copper Rule began Jun 2024 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2022 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2022 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2022 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2017 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2017 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2017 Resolved
Monitoring & reporting · Total coliform began Apr 2013 Resolved
Monitoring & reporting · EPA contaminant 1011 began Jul 2007 Resolved
Monitoring & reporting · Total coliform began Oct 2006 Resolved

Recent enforcement actions

  • State action · SIF Apr 2025
  • State action · SIF Apr 2025
  • State action · SIA Aug 2024
  • State action · SIE Aug 2024
  • State action · SIA Aug 2024
  • State action · SIE Aug 2024
  • State action · SOX Jul 2024
  • State action · SIF Jun 2024

This profile is built from EPA public records for system IL0990300 — 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.