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Water system · PWSID IL0311620

LEMONT

LEMONT, IL · ~17,500 people served

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

PWSID

IL0311620

State

Illinois

City

LEMONT

Population served

17,500

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

Lithium

35,800 ppt

limit —

No federal limit

Violations & enforcement

27

Violations on record

1

Unaddressed

13

Health-based

77

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2024. Official EPA record →

Treatment technique · Lead & Copper Rule health-based began Aug 2025 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2020 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2015 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2015 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2015 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2015 Resolved
Other · EPA contaminant 7000 began Jul 2014 Resolved
Other · EPA contaminant 7000 began Jul 2013 Resolved
Monitoring & reporting · Uranium began Apr 2007 Resolved
Monitoring & reporting · Uranium began Jan 2007 Resolved

Recent enforcement actions

  • State action · SIF Jul 2024
  • State action · SOX Feb 2024
  • State action · SIA Oct 2023
  • State action · SIE Oct 2023
  • State action · SOX Jan 2021
  • State action · SIA Jan 2021
  • State action · SOX Mar 2016
  • State action · SIA Dec 2015

This profile is built from EPA public records for system IL0311620 — 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.