PWSID
IL0312070
State
Illinois
City
NORTHBROOK
Population served
34,407
Primary source
Surface water
Score history
No change since tracking began Jun 18, 2026.
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
4
Violations on record
0
Unaddressed
1
Health-based
24
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement May 2024. Official EPA record →
Recent enforcement actions
- State action · SIF May 2024
- State action · SOX Nov 2023
- State action · SIA Oct 2023
- State action · SIE Oct 2023
- State action · SOX Jan 2021
- State action · SIA Jan 2021
- State action · SIF Jun 2004
- State action · SIA Feb 2004
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.
Arsenic
1 station · latest Aug 2021
Copper
1 station · latest Aug 2021
Manganese
1 station · latest Aug 2021
Fluoride
1 station · latest Aug 2021
Lead
1 station · latest Jun 2021
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 IL0312070 — 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.