OASIS MHP

NORTHBROOK, IL · ~3,000 people served

Check your exact address → NORTHBROOK overview

100

Excellent

PurityRadar safety score

PWSID

IL0315185

State

Illinois

City

NORTHBROOK

Population served

3,000

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2024. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2021 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2021 Resolved

Monitoring & reporting · EPA contaminant 2383 began Jan 2020 Resolved

Monitoring & reporting · Barium began Jan 2020 Resolved

Monitoring & reporting · Selenium began Jan 2020 Resolved

Monitoring & reporting · Beryllium began Jan 2020 Resolved

Monitoring & reporting · Cadmium began Jan 2020 Resolved

Monitoring & reporting · EPA contaminant 1085 began Jan 2020 Resolved

Monitoring & reporting · EPA contaminant 1075 began Jan 2020 Resolved

Monitoring & reporting · EPA contaminant 1036 began Jan 2020 Resolved

Monitoring & reporting · Antimony began Jan 2020 Resolved

Other · EPA contaminant 7000 began Jul 2012 Resolved

Recent enforcement actions

State action · SOX Feb 2024
State action · SOX Sep 2023
State action · SOX Jun 2023
State action · SIF May 2023
State action · SIF May 2023
State action · SIF May 2023
State action · SIF May 2023
State action · SIF May 2023

This profile is built from EPA public records for system IL0315185 — 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.