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Water system · PWSID IL1115700

PRAIRIE PATH WATER CO-WHISPERING HILLS

MCHENRY, IL · ~8,300 people served

Check your exact address → MCHENRY overview
66
Fair
PurityRadar safety score

PWSID

IL1115700

State

Illinois

City

MCHENRY

Population served

8,300

Primary source

Groundwater

Score history

▼ 34 points — the score moved from 100 to 66 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 66

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).

PFOA

Perfluorooctanoic acid

8.3 ppt

limit 4 ppt

Above EPA limit · 2.1×

PFHxS

Perfluorohexanesulfonic acid

5.7 ppt

limit 10 ppt

Near EPA limit

Lithium

11,000 ppt

limit —

No federal limit

PFPeA

14 ppt

limit —

No federal limit

PFHxA

13 ppt

limit —

No federal limit

PFBA

8.7 ppt

limit —

No federal limit

PFBS

8.6 ppt

limit —

No federal limit

PFHpA

3.6 ppt

limit —

No federal limit

Violations & enforcement

14

Violations on record

0

Unaddressed

2

Health-based

58

Enforcement actions

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

Other · EPA contaminant 7500 began Jan 2025 Resolved
Other · EPA contaminant 7500 began Jan 2025 Resolved
Other · EPA contaminant 7500 began Jan 2025 Resolved
Other · EPA contaminant 7500 began Jan 2025 Resolved
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Resolved
Monitoring & reporting · Nitrate began Jan 2023 Resolved
Monitoring & reporting · Nitrate began Jan 2023 Resolved
Monitoring & reporting · Nitrate began Jan 2023 Resolved
Monitoring & reporting · Nitrate began Jan 2023 Resolved
Monitoring & reporting · Nitrate began Jan 2023 Resolved
Other · EPA contaminant 7000 began Jul 2018 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2009 Resolved

Recent enforcement actions

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

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

1 station · latest Jun 2020

0.153 · max 0.153 mg/l as N · 2

Arsenic

1 station · latest Jun 2020

0.48 · max 0.48 ug/l · 1

Fluoride

1 station · latest Jun 2020

0.11 · max 0.11 mg/l · 1

Manganese

1 station · latest Jun 2020

54.1 · max 54.1 ug/l · 1

Uranium

1 station · latest Jun 2020

0.926 · max 0.926 ug/l · 1

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 IL1115700 — 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.