Water Quality in MONTREAL, WI (54550)
EPA violation data for public water systems serving ZIP code 54550.
10
Total Violations
5
Health-Based
5
Monitoring / Reporting
9
Resolved
What does this mean?
9 of 10 violations have been resolved. 5 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 5 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 (10 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Groundwater Rule | Health-Based | N/A | N/A | Sep 1, 2025 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Sep 1, 2025 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Sep 1, 2025 | Resolved | N/A |
| LEAD AND COPPER RULE REVISIONS | Monitoring | N/A | N/A | Jul 1, 2025 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Health-Based | N/A | N/A | May 1, 2023 | Resolved | N/A |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Health-Based | N/A | N/A | May 1, 2023 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(4)
Groundwater Rule
45
Groundwater Rule
45
Groundwater Rule
45
LEAD AND COPPER RULE REVISIONS
4H
2023(6)
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Stage 1 Disinfectants and Disinfection Byproducts Rule
12
Stage 1 Disinfectants and Disinfection Byproducts Rule
12
How Does This Compare?
MONTREAL (54550) has 10 recorded violations, including 5 health-based. 1 remains 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
Always look for filters certified by NSF International for the specific contaminants you want to remove.