Transient Non-Community Water System · PWS MT0002968
Jefferson Lines
Operator location Minneapolis, Montana - smaller served population (≤ 999) at 32 people served; 159 SDWIS violations on record from groundwater sources.
- 32
- People served (this PWS)
- 159
- EPA violations (this PWS)
- 8
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Jefferson Lines standing, high SDWIS violation third
32 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 5% is middle-third health share (≤ 23%).
The verdict
Jefferson Lines sits in the upper third of the sitemap cohort by violation count (159), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (32; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 5% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 159
- Total EPA violations on record
- 5%
- Health-based (MCL / treatment failure)
- 32
- 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
- 2
- County
- Missoula
- School/Daycare
- No
- MCL Violations
- 8
- Monitoring Violations
- 147
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 94 | 2016 |
| Revised Total Coliform Rule | MON | 29 | 2018 |
| Nitrate-Nitrite | MR | 23 | 2017 |
| Coliform (TCR) | MCL | 8 | 2000 |
| Revised Total Coliform Rule | Other | 4 | 2016 |
| Nitrate | MR | 1 | 1993 |
Violation Count vs. the National Corpus
Jefferson Lines has 159 recorded EPA violations, 82% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 18% carry more. 5% of this system's own violations are health-based (8 of 159), 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)
159 Higher than most more violations than 82% 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
Population served record for Jefferson Lines
EPA SDWIS lists 32 people served and 2 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
159 violations · 32 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 Jefferson Lines
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.