Transient Non-Community Water System · PWS MT0001659
Longhorn Bar
Operator location Rosebud, Montana - 59% of 131 violations are health-based (upper-third health share (> 23%)); surface water source; 75 served per SDWIS.
- 75
- People served (this PWS)
- 131
- EPA violations (this PWS)
- 77
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Longhorn Bar standing, high SDWIS violation third
59% of 131 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 59% is upper-third health share (> 23%).
The verdict
Longhorn Bar sits in the upper third of the sitemap cohort by violation count (131), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (75; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 59% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 131
- Total EPA violations on record
- 59%
- Health-based (MCL / treatment failure)
- 75
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Rosebud
- School/Daycare
- No
- MCL Violations
- 77
- Monitoring Violations
- 50
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate-Nitrite | MCL | 64 | 2009 |
| Coliform (TCR) | MR | 45 | 2015 |
| Coliform (TCR) | MCL | 13 | 2010 |
| Nitrate-Nitrite | MR | 4 | 2003 |
| Revised Total Coliform Rule | Other | 3 | 2016 |
| Nitrate | MR | 1 | 1993 |
Violation Count vs. the National Corpus
Longhorn Bar has 131 recorded EPA violations, 79% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 21% carry more. 59% of this system's own violations are health-based (77 of 131), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
131 Higher than most more violations than 79% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Longhorn Bar
77 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MT0001659.
Sources: EPA SDWIS
Nationwide peers
131 violations · 75 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Longhorn Bar
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Montana compares on the same EPA violation measures. Montana systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.