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Water system · PWSID IL0316000

CHICAGO

CHICAGO, IL · ~2,746,388 people served

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

PWSID

IL0316000

State

Illinois

City

CHICAGO

Population served

2,746,388

Primary source

Surface water

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

54

Violations on record

2

Unaddressed

1

Health-based

79

Enforcement actions

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

Reporting · EPA contaminant 5200 began Jul 2025 Unaddressed
Other · EPA contaminant 7500 began Jun 2025 Unaddressed
Monitoring & reporting · EPA contaminant 0300 began May 2025 Resolved
Monitoring & reporting · EPA contaminant 0300 began Apr 2025 Resolved
Monitoring & reporting · Bromate began Jul 2024 Resolved
Monitoring & reporting · Bromate began Jul 2024 Resolved
Monitoring & reporting · Bromate began Jul 2024 Resolved
Monitoring & reporting · Bromate began Jul 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2021 Resolved
Other · EPA contaminant 7000 began Jul 2021 Resolved
Other · EPA contaminant 7000 began Jul 2020 Resolved
Monitoring & reporting · EPA contaminant 2031 began Jan 2019 Resolved

Recent enforcement actions

  • State action · SIA Jul 2025
  • State action · SIF Jul 2025
  • State action · SIF Jul 2025
  • State action · SIF Jul 2025
  • State action · SIF Jul 2025
  • State action · SOX Jul 2025
  • State action · SIE Jul 2025
  • State action · SIA Jul 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

11 stations · latest Nov 2025

2.11 · max 5.67 ug/L · 138

Manganese

10 stations · latest Nov 2025

24.5 · max 148 ug/L · 136

Copper

9 stations · latest Nov 2025

2.6 · max 23.4 ug/L · 96

Lead

9 stations · latest Nov 2025

0.955 · max 102 ug/L · 58

Fluoride

11 stations · latest Nov 2025

0.5 · max 0.58 mg/L · 57

Atrazine

1 station · latest Jun 2021

0.0485 · max 0.05 ug/L · 2

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 IL0316000 — 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.