Water Quality in MONTELLO, WI (53949)
EPA violation data for public water systems serving ZIP code 53949.
82
Total Violations
4
Health-Based
78
Monitoring / Reporting
78
Resolved
What does this mean?
78 of 82 violations have been resolved. 4 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 78 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 (82 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| E. COLI | Monitoring | 0 | N/A | Jul 25, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Jul 25, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Jul 25, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| LEAD AND COPPER RULE REVISIONS | Monitoring | N/A | N/A | Jul 1, 2025 | Active | N/A |
| E. COLI | Monitoring | 0 | N/A | Jun 14, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Jun 14, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Jun 14, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| Groundwater Rule | Health-Based | N/A | N/A | Apr 28, 2025 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Apr 28, 2025 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Apr 28, 2025 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(18)
E. COLI
34
E. COLI
34
E. COLI
34
LEAD AND COPPER RULE REVISIONS
4H
E. COLI
34
E. COLI
34
E. COLI
34
Groundwater Rule
45
Groundwater Rule
45
Groundwater Rule
45
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
2024(10)
LEAD AND COPPER RULE REVISIONS
2E
Public Notice
75
Public Notice
75
LEAD AND COPPER RULE REVISIONS
4G
Public Notice
75
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
How Does This Compare?
MONTELLO (53949) has 82 recorded violations, including 4 health-based. 4 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
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
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.