Community Water System · PWS MT0000161
Bozeman City Of
Operator location Bozeman, Montana - 24% of 17 violations are health-based (upper-third health share (> 23%)); surface water source; 56,000 served per SDWIS.
- 56,000
- People served (this PWS) Larger third of systems
- 17
- EPA violations (this PWS) Lower third of systems
- 4
- Health-based (this PWS) Upper third by health-based share
- No PFAS
- UCMR5 (this PWS) Tested, none detected
Bozeman City Of standing, low SDWIS violation third
24% of 17 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 24% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #959 of 29,740 among systems serving 500+.
The verdict
Bozeman City Of is in the lower third by violation count (17; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is large (56,000; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 24% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #959 of 29,740
- Population · /systems
- #4 of 283
- Population · MT
- 17
- Total EPA violations on record
- 24%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 15,108
- County
- Gallatin
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 10
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 5 | 1998 |
| Interim Enhanced Surface Water Treatment Rule | TT | 4 | 2013 |
| Nitrate | MR | 2 | 1994 |
| Arsenic | MR | 2 | 1996 |
| o-Dichlorobenzene | MR | 1 | 1993 |
Violation Count vs. the National Corpus
Bozeman City Of has 17 recorded EPA violations, 28% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 71% carry more. 24% of this system's own violations are health-based (4 of 17), and it ranks #959 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
17 Lower than most fewer violations than 71% 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
How many violations vs. how serious, among peer systems
Bozeman City Of plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 174 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NFDHA | 8/6/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFMPA | 8/6/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 8/6/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 8/6/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 8/6/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 8/6/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFMBA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 8/6/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 4:2 FTS | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 8/6/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 8/6/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 8/6/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/6/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 6:2 FTS | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 8/6/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 8/6/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 8/6/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOS | 8/6/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 8/6/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 8/6/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| NMeFOSAA | 8/6/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| 9Cl-PF3ONS | 8/6/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHpS | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 8/6/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 8/6/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
Health-based violations on Bozeman City Of
4 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MT0000161.
Sources: EPA SDWIS
Nationwide peers
17 violations · 56,000 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Bozeman City Of
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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.