THORNAPPLE LAKE ESTATES

TROY, MI · ~538 people served

Check your exact address → TROY overview

100

Excellent

PurityRadar safety score

PWSID

MI0040047

State

Michigan

City

TROY

Population served

538

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 Nov 2021. Official EPA record →

Other · EPA contaminant 7000 began Jul 2021 Resolved

Reporting · Lead & Copper Rule began Jun 2018 Resolved

Monitoring & reporting · Arsenic began Oct 2006 Resolved

Monitoring & reporting · Total coliform began Jan 2000 Resolved

Recent enforcement actions

State action · SIA Nov 2021
State action · SOX Sep 2021
State action · SIF Sep 2018
State action · SIA Aug 2018
State action · SIE Aug 2018
State action · SOX Aug 2018
State action · SIF Aug 2018
State action · SIE Mar 2007

This profile is built from EPA public records for system MI0040047 — 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.