A83/100
Grosse Ile Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 10,371 residents · Michigan
What's In Grosse Ile's Tap Water?
69
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.019 mg/L | 0.015 mg/L | Over Limit |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – September 30, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – September 30, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
GROSSE ILE TOWNSHIP
Population Served
10,371
Water Source
Purchased Surface Water
System ID
MI0002870
Frequently Asked Questions About Grosse Ile Water
Is Grosse Ile tap water safe to drink?
Grosse Ile, Michigan tap water receives a grade of A (83/100), which is considered excellent. Out of 69 contaminants tested, 1 exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Grosse Ile's water?
Of the 69 contaminants tested in Grosse Ile's water supply, the most notable include Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Grosse Ile have any water quality violations?
Yes, Grosse Ile has 5 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other, TT. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Grosse Ile?
Based on EPA data, using a water filter in Grosse Ile is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Grosse Ile's tap water come from?
Grosse Ile's drinking water is sourced from purchased surface water and supplied by GROSSE ILE TOWNSHIP. The system serves approximately 10,371 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Grosse Ile's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Grosse Ile's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Grosse Ile's water compare to other cities in Michigan?
Grosse Ile's water quality score of 83/100 earns a grade of A, which is considered excellent. This places Grosse Ile among the better-performing water systems in Michigan. Visit our Michigan state page to see how all cities in the state compare.
What should I do if I'm concerned about Grosse Ile's water quality?
If you have concerns about Grosse Ile's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (GROSSE ILE TOWNSHIP) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.