Water Quality in Tunnel City, WI: No Violations - Grade D
Grade D · Score 53/100 · 1 water system · Updated 2026-07-18
Tunnel City's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-07-18
Tunnel City, WI has zero reported violations - 1 water system, all compliant.
Water Quality by ZIP Code in Tunnel City
Tunnel City is covered by a single ZIP code, so one water-quality profile applies citywide. See the contaminant data below.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 54662 | D | 53 | 0 | 0 | View report → |
Water Quality Overview
Tunnel City, Wisconsin receives a water quality grade of D with an overall score of 53 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
No EPA violations have been recorded for the 1 water system serving Tunnel City. This is a positive indicator, though it does not guarantee the absence of all contaminants - some substances (like PFAS) are not yet fully regulated.
What Grade D Means
A grade of D indicates significant compliance issues. Tunnel City's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
Lead testing data for Tunnel City is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
Radon Risk
Tunnel City is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Tunnel City
Tunnel City is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 9,192 people across 1 ZIP code.
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 5 enforcement actions against water systems serving Tunnel City. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Tunnel City
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
EPA Enforcement History
The EPA and state regulators have taken 5 enforcement actions against water systems serving Tunnel City. Recent actions:
| Date | Action Type |
|---|---|
| 2025-08-22 | State Filed Suit |
| 2025-06-30 | State Informal Action |
| 2025-06-26 | State Filed Judgment |
| 2025-06-05 | State Informal Action |
| 2025-06-02 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-08-22.
Tunnel City vs. Nearby Wisconsin Cities
How Tunnel City's water quality compares to similar cities in Wisconsin:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Tunnel City | D | 0 | 1 | 9,192 |
| Merton | D | 0 | 1 | 9,212 |
| Hortonville | B | 3 | 5 | 9,167 |
| Slinger | C | 2 | 2 | 9,223 |
Common Questions About Tunnel City Water
These are the most common questions residents search for about water quality in Tunnel City, Wisconsin:
Is Tunnel City water hard or soft? Water hardness varies by source. Tunnel City's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Tunnel City tap water? Tunnel City's water receives a grade of D (53/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Tunnel City? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Tunnel City vs. Wisconsin Average
Understanding how Tunnel City 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 Tunnel City.
ZIP Codes in Tunnel City
Tunnel City spans 1 ZIP code. 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.