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Water system · PWSID IL1110050

ALGONQUIN

ALGONQUIN, IL · ~30,700 people served

Check your exact address → ALGONQUIN overview

100

Excellent

PurityRadar safety score

PWSID

IL1110050

State

Illinois

City

ALGONQUIN

Population served

30,700

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 Sep 2007. Official EPA record →

Other · EPA contaminant 7500 began Aug 2007 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2006 Resolved

Monitoring & reporting · Total coliform began Jul 2006 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2006 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 1999 Resolved

Monitoring & reporting · Lead & Copper Rule began Apr 1999 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1999 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 1998 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1998 Resolved

Treatment technique · Lead & Copper Rule health-based began Sep 1993 Resolved

Treatment technique · Lead & Copper Rule health-based began Jul 1993 Resolved

Recent enforcement actions

State action · SIA Sep 2007
State action · SOX Aug 2007
State action · SIF Aug 2007
State action · SOX Mar 2007
State action · SIF Oct 2006
State action · SIA Sep 2006
State action · SIE Sep 2006
State action · SOX Aug 2006

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

Manganese

2 stations · latest Oct 2022

19.6 · max 80.4 ug/L · 37

Arsenic

2 stations · latest Aug 2022

0.97 · max 4.14 ug/L · 34

Copper

2 stations · latest May 2022

1.12 · max 3.19 ug/L · 10

Lead

1 station · latest Jun 2021

0.29 · max 0.91 ug/L · 3

Fluoride

1 station · latest Jul 2022

0.19 · max 0.2 mg/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 IL1110050 — 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.