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Water system · PWSID IL1110950

WOODSTOCK

WOODSTOCK, IL · ~25,630 people served

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

PWSID

IL1110950

State

Illinois

City

WOODSTOCK

Population served

25,630

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

5

Violations on record

0

Unaddressed

1

Health-based

19

Enforcement actions

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

Other · EPA contaminant 7500 began Mar 2025 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2025 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2025 Resolved
Treatment technique · Lead & Copper Rule health-based began Apr 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 1997 Resolved

Recent enforcement actions

  • State action · SOX May 2025
  • State action · SIE Apr 2025
  • State action · SIA Apr 2025
  • State action · SIA Mar 2025
  • State action · SIF Mar 2025
  • State action · SOX Mar 2025
  • State action · SOX Feb 2025
  • State action · SIA Jan 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

Arsenic

2 stations · latest May 2021

0.17 · max 0.62 ug/l · 3

Fluoride

2 stations · latest May 2021

0.15 · max 0.45 mg/l · 3

Manganese

2 stations · latest May 2021

63.3 · max 68 ug/l · 3

Copper

1 station · latest May 2021

34.7 · max 66.7 ug/l · 2

Uranium

1 station · latest May 2021

1.59 · max 1.63 ug/l · 2

Lead

1 station · latest May 2021

0.351 · max 0.351 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 IL1110950 — 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.