Water Quality in MARKESAN, WI (53946)
EPA violation data for public water systems serving ZIP code 53946.
70
Total Violations
5
Health-Based
65
Monitoring / Reporting
63
Resolved
What does this mean?
63 of 70 violations have been resolved. 5 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 65 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.
Violations Detail (70 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Sep 30, 2024 | Active | N/A |
| Public Notice | Monitoring | N/A | N/A | Sep 30, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| E. COLI | Monitoring | 0 | N/A | Aug 24, 2024 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Aug 24, 2024 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Aug 24, 2024 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
Lead & Copper Levels
Violation Timeline
2025(2)
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
2024(18)
Public Notice
75
Public Notice
75
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
E. COLI
34
E. COLI
34
E. COLI
34
E. COLI
34
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Public Notice
75
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
How Does This Compare?
MARKESAN (53946) has 70 recorded violations, including 5 health-based. 7 remain unresolved. Consider testing your tap water independently for added peace of mind.
Recommended Water Filters
Based on the contaminants detected in your area, these filter types may help improve your water quality.
Reverse Osmosis System
One of the few filtration methods effective at removing nitrates and nitrites. Essential for households with infants.
Targets:Nitrate, Nitrite, Dissolved Solids
Look for:NSF/ANSI 58 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove.