Water Quality in BIG SKY, MT (59716)
EPA violation data for public water systems serving ZIP code 59716.
67
Total Violations
7
Health-Based
60
Monitoring / Reporting
67
Resolved
What does this mean?
67 of 67 violations have been resolved. 7 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 60 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 (67 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2025 | Resolved | N/A |
| E. COLI | Monitoring | 0 | N/A | May 12, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | May 12, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | May 12, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| Groundwater Rule | Health-Based | N/A | N/A | Apr 30, 2025 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Apr 30, 2025 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Apr 30, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(15)
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
E. COLI
34
E. COLI
34
E. COLI
34
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
2024(11)
Lead and Copper Rule
66
Lead and Copper Rule
66
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
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
How Does This Compare?
BIG SKY (59716) has 67 recorded violations, including 7 health-based. All violations have been resolved, which is a positive sign for current water quality. 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.