Water Quality in Maiden Rock, WI: 2 Violations — Grade C
Grade C · Score 66/100 · 1 water system · Updated 2026-05-03
Maiden Rock's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
On record with EPA: Maiden Rock, WI has 2 water violations.
Water Quality by ZIP Code in Maiden Rock
Water quality varies across Maiden Rock's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 54750 | C | 66 | 2 | 1 | View report → |
Water Quality Overview
Maiden Rock, Wisconsin receives a water quality grade of C with an overall score of 66 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving Maiden Rock have accumulated 2 EPA violations, including 1 health-based violation. These violations are tracked across 1 ZIP codes serving approximately 118 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Maiden Rock's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Maiden Rock water systems is 0.0004 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 65% of homes built before 1986, Maiden Rock 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.
Radon Risk
Maiden Rock is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Maiden Rock
Maiden Rock is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 118 people across 1 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
How to Check Your Water in Maiden Rock
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 Maiden Rock Water Systems
The following contaminants have been detected or caused violations across Maiden Rock's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Stage 2 DBP Rule | Treatment Technique | N/A | 1 | 1 | Yes |
| Lead and Copper Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Maiden Rock vs. Nearby Wisconsin Cities
How Maiden Rock's water quality compares to similar cities in Wisconsin:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Maiden Rock | C | 2 | 1 | 118 |
| Dodge | C | 8 | 1 | 120 |
| Plum City | C | 3 | 1 | 120 |
| Brussels | D | 0 | 1 | 122 |
Common Questions About Maiden Rock Water
These are the most common questions residents search for about water quality in Maiden Rock, Wisconsin:
Is Maiden Rock water hard or soft? Water hardness varies by source. Maiden Rock's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Maiden Rock tap water? Maiden Rock's water receives a grade of C (66/100). There are 1 health-based violations — consider filtration.
What is the best water filter for Maiden Rock? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Maiden Rock vs. Wisconsin Average
Understanding how Maiden Rock compares to the broader Wisconsin 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 Maiden Rock.
ZIP Codes in Maiden Rock
Maiden Rock spans 1 ZIP code. The ZIP with the lowest water quality score is 54750. 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.