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Water system · PWSID IL1110600

MCHENRY

MCHENRY, IL · ~22,335 people served

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

PWSID

IL1110600

State

Illinois

City

MCHENRY

Population served

22,335

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

Lithium

9,090 ppt

limit —

No federal limit

PFBS

3.9 ppt

limit —

No federal limit

Violations & enforcement

26

Violations on record

1

Unaddressed

1

Health-based

20

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Jul 2025 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2955 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2968 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2977 began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2023 Resolved

Recent enforcement actions

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

This profile is built from EPA public records for system IL1110600 — 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.