GRASS LAKE

GRASS LAKE, MI · ~1,986 people served

Check your exact address → GRASS LAKE overview

100

Excellent

PurityRadar safety score

PWSID

MI0002830

State

Michigan

City

GRASS LAKE

Population served

1,986

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 Jul 2024. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2023 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2023 Resolved

Reporting · Lead & Copper Rule began Sep 2022 Resolved

Monitoring & reporting · Total coliform began Feb 1996 Resolved

Recent enforcement actions

State action · SOX Jul 2024
State action · SIF Jul 2024
State action · SIE Sep 2023
State action · SIA Sep 2023
State action · SIF Nov 2022
State action · SIA Oct 2022
State action · SIE Oct 2022
State action · SOX Sep 2022

This profile is built from EPA public records for system MI0002830 — 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.