Water Quality in Grosse Pointe, MI: 6 Violations — Grade A
Grade A · Score 89/100 · 1 water system · Updated 2026-05-03
Grosse Pointe's water meets all EPA standards with no health-based violations.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Grosse Pointe in MI has 6 EPA water violations documented — the compliance history below covers what was flagged and which local systems are associated with each finding.
Water Quality by ZIP Code in Grosse Pointe
Water quality varies across Grosse Pointe's 2 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 48230 | A | 89 | 3 | 0 | View report → |
| 48236 | A | 89 | 3 | 0 | View report → |
Water Quality Overview
Grosse Pointe, Michigan receives a water quality grade of A with an overall score of 89 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving Grosse Pointe have accumulated 6 EPA violations (all monitoring/reporting type). These violations are tracked across 2 ZIP codes serving approximately 5,421 people.
What Grade A Means
A grade of A indicates excellent compliance with EPA drinking water standards. Grosse Pointe's water systems have maintained strong performance in both contaminant monitoring and regulatory compliance.
Lead Levels
The average 90th percentile lead level across Grosse Pointe water systems is 0.0024 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 95% of homes built before 1986, Grosse Pointe has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Water Systems Serving Grosse Pointe
Grosse Pointe is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 5,421 people across 2 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 16 enforcement actions against water systems serving Grosse Pointe. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Grosse Pointe
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Grosse Pointe Water Systems
The following contaminants have been detected or caused violations across Grosse Pointe's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | N/A | 2 | 2 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 2 | 2 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 2 | 2 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 8 enforcement actions against water systems serving Grosse Pointe. Recent actions:
| Date | Action Type |
|---|---|
| 2023-08-25 | State Informal Action |
| 2022-09-02 | State Order Extension |
| 2022-09-02 | State Informal Action |
| 2022-08-17 | State Order Extension |
| 2022-05-26 | State Order Extension |
| 2022-04-15 | State Informal Action |
| 2021-11-19 | State Informal Action |
| 2021-11-19 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2023-08-25.
Grosse Pointe vs. Nearby Michigan Cities
How Grosse Pointe's water quality compares to similar cities in Michigan:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Grosse Pointe | A | 6 | 1 | 5,421 |
| Azalia | D | 0 | 1 | 5,400 |
| Dundee | B | 1 | 1 | 5,400 |
| Walled Lake | B | 2 | 1 | 5,452 |
Common Questions About Grosse Pointe Water
These are the most common questions residents search for about water quality in Grosse Pointe, Michigan:
Is Grosse Pointe water hard or soft? Water hardness varies by source. Grosse Pointe's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Grosse Pointe tap water? Grosse Pointe's water receives a grade of A (89/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Grosse Pointe? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Grosse Pointe vs. Michigan Average
Understanding how Grosse Pointe compares to the broader Michigan average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Grosse Pointe.
ZIP Codes in Grosse Pointe
Grosse Pointe spans 2 ZIP codes. The ZIP with the lowest water quality score is 48230. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.
Frequently Asked Questions
Your Water is Safe — Here's How to Keep It That Way
Grade A is excellent news. Here's what proactive homeowners do to maintain water quality:
Annual Water Testing
EPA recommends annual testing even with clean water. Home test kits: $20-$50. Catches changes before they become problems.
Maintenance Filtration
A basic carbon filter removes chlorine taste and catches emerging contaminants like PFAS that aren't yet fully regulated.
Plumbing Check
Even safe city water picks up lead from home pipes. If your home was built before 1986, a one-time pipe inspection is recommended.