Water Quality in HARLEM, MT (59526)
EPA violation data for public water systems serving ZIP code 59526.
168
Total Violations
136
Health-Based
32
Monitoring / Reporting
160
Resolved
What does this mean?
160 of 168 violations have been resolved. 136 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 32 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 (168 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Consumer Confidence Rule | Monitoring | N/A | N/A | Sep 30, 2025 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Sep 30, 2025 | Resolved | N/A |
| TTHM | Health-Based | N/A | 0.145 | Sep 30, 2025 | Active | N/A |
| TTHM | Health-Based | N/A | 0.145 | Sep 30, 2025 | Active | N/A |
| TTHM | Health-Based | N/A | 0.145 | Sep 30, 2025 | Active | N/A |
| TTHM | Health-Based | N/A | 0.145 | Sep 30, 2025 | Active | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Aug 25, 2025 | Active | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Aug 25, 2025 | Active | N/A |
| TTHM | Health-Based | N/A | 0.104 | Jun 30, 2025 | Resolved | N/A |
| TTHM | Health-Based | N/A | 0.156 | Jun 30, 2025 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(26)
Consumer Confidence Rule
72
Consumer Confidence Rule
72
TTHM
02
TTHM
02
TTHM
02
TTHM
02
Revised Total Coliform Rule
2A
Revised Total Coliform Rule
2A
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
CARBON, TOTAL
46
TTHM
27
Total Haloacetic Acids (HAA5)
27
TTHM
27
TTHM
27
TTHM
27
TTHM
27
Total Haloacetic Acids (HAA5)
27
Total Haloacetic Acids (HAA5)
27
Total Haloacetic Acids (HAA5)
27
Total Haloacetic Acids (HAA5)
27
2024(54)
DICHLOROMETHANE
03
DICHLOROMETHANE
03
TTHM
02
TTHM
02
CARBON, TOTAL
46
CARBON, TOTAL
46
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
CARBON, TOTAL
46
CARBON, TOTAL
46
TTHM
02
Total Haloacetic Acids (HAA5)
02
Total Haloacetic Acids (HAA5)
02
Total Haloacetic Acids (HAA5)
02
Lead and Copper Rule
52
Lead and Copper Rule
52
TTHM
02
TTHM
02
TTHM
02
TTHM
02
TTHM
02
Total Haloacetic Acids (HAA5)
02
Total Haloacetic Acids (HAA5)
02
CARBON, TOTAL
46
CARBON, TOTAL
46
CARBON, TOTAL
46
TTHM
02
TTHM
02
TTHM
02
Long Term 2 Enhanced Surface Water Treatment Rule
42
Long Term 2 Enhanced Surface Water Treatment Rule
42
Long Term 2 Enhanced Surface Water Treatment Rule
42
Total Haloacetic Acids (HAA5)
02
TTHM
02
TTHM
02
TTHM
02
Total Haloacetic Acids (HAA5)
02
Total Haloacetic Acids (HAA5)
02
Total Haloacetic Acids (HAA5)
02
CARBON, TOTAL
46
TTHM
02
TTHM
02
CARBON, TOTAL
46
CARBON, TOTAL
46
TTHM
02
TTHM
02
TTHM
02
TTHM
02
How Does This Compare?
HARLEM (59526) has 168 recorded violations, including 136 health-based. 8 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
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 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.