Water Quality in Cuba City, WI: 2 Violations — Grade C
Grade C · Score 69/100 · 1 water system · Updated 2026-05-03
Cuba City'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
Cuba City, WI — 2 compliance events documented in the federal drinking water record.
Water Quality by ZIP Code in Cuba City
Water quality varies across Cuba City's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 53807 | C | 69 | 2 | 1 | View report → |
Water Quality Overview
Cuba City, Wisconsin receives a water quality grade of C with an overall score of 69 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving Cuba City have accumulated 2 EPA violations, including 1 health-based violation. These violations are tracked across 1 ZIP codes serving approximately 2,141 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Cuba City'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 Cuba City water systems is 0.0019 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 71% of homes built before 1986, Cuba City 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
Cuba City 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 Cuba City
Cuba City is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 2,141 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
The EPA has taken 1 enforcement action against water systems serving Cuba City. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Cuba 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
Contaminants Detected in Cuba City Water Systems
The following contaminants have been detected or caused violations across Cuba City'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.
EPA Enforcement History
The EPA and state regulators have taken 1 enforcement action against water systems serving Cuba City. Recent actions:
| Date | Action Type |
|---|---|
| 2025-06-03 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-06-03.
Cuba City vs. Nearby Wisconsin Cities
How Cuba City's water quality compares to similar cities in Wisconsin:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Cuba City | C | 2 | 1 | 2,141 |
| Whitehall | B | 4 | 2 | 2,120 |
| Butler | C | 3 | 1 | 2,181 |
| Eagle | C | 0 | 2 | 2,100 |
Common Questions About Cuba City Water
These are the most common questions residents search for about water quality in Cuba City, Wisconsin:
Is Cuba City water hard or soft? Water hardness varies by source. Cuba City's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Cuba City tap water? Cuba City's water receives a grade of C (69/100). There are 1 health-based violations — consider filtration.
What is the best water filter for Cuba City? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Cuba City vs. Wisconsin Average
Understanding how Cuba 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 Cuba City.
ZIP Codes in Cuba City
Cuba City spans 1 ZIP code. The ZIP with the lowest water quality score is 53807. 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.