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Water system · PWSID IL1970250

CREST HILL

CREST HILL, IL · ~21,169 people served

Check your exact address → CREST HILL overview
54
Fair
PurityRadar safety score

PWSID

IL1970250

State

Illinois

City

CREST HILL

Population served

21,169

Primary source

Groundwater

Score history

▼ 46 points — the score moved from 100 to 54 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 54

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 Dec 2023). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

14 ppt

limit 4 ppt

Above EPA limit · 3.4×

PFHxS

Perfluorohexanesulfonic acid

6.6 ppt

limit 10 ppt

Near EPA limit

Lithium

33,500 ppt

limit —

No federal limit

PFBS

44 ppt

limit —

No federal limit

PFPeA

26 ppt

limit —

No federal limit

PFHxA

22 ppt

limit —

No federal limit

PFBA

19 ppt

limit —

No federal limit

PFHpA

13 ppt

limit —

No federal limit

Violations & enforcement

36

Violations on record

4

Unaddressed

3

Health-based

120

Enforcement actions

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

Other · EPA contaminant 7500 began Jul 2025 Unaddressed
Reporting · EPA contaminant 5200 began Jul 2025 Unaddressed
Other · EPA contaminant 7000 began Jul 2025 Unaddressed
Other · EPA contaminant 7000 began Jul 2024 Unaddressed
Monitoring & reporting · EPA contaminant 0999 began Oct 2025 Resolved
Monitoring · Lead & Copper Rule began Oct 2025 Resolved
Other · EPA contaminant 7500 began Feb 2025 Resolved
Other · EPA contaminant 7500 began Jul 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2024 Resolved
Treatment technique · Lead & Copper Rule health-based began Jan 2024 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2023 Resolved

Recent enforcement actions

  • State action · SIE Dec 2025
  • State action · SIA Dec 2025
  • State action · SIA Dec 2025
  • State action · SIE Dec 2025
  • State action · SOX Nov 2025
  • State action · SIA Aug 2025
  • State action · SIA Aug 2025
  • State action · SIA Jul 2025

This profile is built from EPA public records for system IL1970250 — 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.