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Water system · PWSID IL1970500

LOCKPORT

LOCKPORT, IL · ~23,100 people served

Check your exact address → LOCKPORT overview
93
Excellent
PurityRadar safety score

PWSID

IL1970500

State

Illinois

City

LOCKPORT

Population served

23,100

Primary source

Groundwater

Score history

▼ 7 points — the score moved from 100 to 93 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 93

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

PFHxS

Perfluorohexanesulfonic acid

9.2 ppt

limit 10 ppt

Near EPA limit

Lithium

26,200 ppt

limit —

No federal limit

PFPeA

8.2 ppt

limit —

No federal limit

PFHxA

4.3 ppt

limit —

No federal limit

PFBS

3.2 ppt

limit —

No federal limit

Violations & enforcement

29

Violations on record

1

Unaddressed

14

Health-based

125

Enforcement actions

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

Reporting · EPA contaminant 5200 began Jul 2025 Unaddressed
Max contaminant level (MCL) · Total coliform health-based began Jun 2015 Resolved
Monitoring & reporting · EPA contaminant 3014 began Jul 2012 Resolved
Monitoring & reporting · Nitrite began Jan 2011 Resolved
Other · EPA contaminant 7500 began Aug 2009 Resolved
Other · EPA contaminant 7500 began Aug 2009 Resolved
Monitoring & reporting · Total coliform began Jul 2008 Resolved
Other · EPA contaminant 7500 began Dec 2006 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2006 Resolved
Monitoring & reporting · Combined radium-226/228 began Jan 2005 Resolved
Monitoring & reporting · Uranium began Jan 2005 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2001 Resolved

Recent enforcement actions

  • State action · SIF Dec 2025
  • State action · SIA Jul 2025
  • State action · SIE Jul 2025
  • State action · SOX Jul 2015
  • State action · SIF Jul 2015
  • State action · SIE Jul 2015
  • State action · SIA Jul 2015
  • State action · SIF Jun 2014

This profile is built from EPA public records for system IL1970500 — 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.