ISLAND LAKE

ISLAND LAKE, IL · ~8,066 people served

Check your exact address → ISLAND LAKE overview

100

Excellent

PurityRadar safety score

PWSID

IL0974540

State

Illinois

City

ISLAND LAKE

Population served

8,066

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2023). Levels in parts per trillion (ppt).

Lithium

11,000 ppt

limit —

No federal limit

Violations & enforcement

No violations are on record for this system in EPA’s SDWIS/ECHO data.

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

Nitrate

1 station · latest May 2021

0.088 · max 0.13 mg/l as N · 4

Copper

1 station · latest May 2021

1.5 · max 1.7 ug/l · 2

Fluoride

1 station · latest May 2021

0.11 · max 0.12 mg/l · 2

Lead

1 station · latest May 2021

0.039 · max 0.055 ug/l · 2

Manganese

1 station · latest May 2021

88.7 · max 113 ug/l · 2

Uranium

1 station · latest May 2021

1.73 · max 1.95 ug/l · 2

Arsenic

1 station · latest May 2021

0.15 · max 0.15 ug/l · 1

Atrazine

1 station · latest May 2021

4.84 · max 4.84 ng/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 IL0974540 — 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.