Non-Transient Non-Community Water System · PWS MT0004656
Comstock
Operator location Tampa, Montana - 57% of 37 violations are health-based (upper-third health share (> 23%)); groundwater source; 330 served per SDWIS.
- 330
- People served (this PWS)
- 37
- EPA violations (this PWS)
- 21
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Comstock standing, mid SDWIS violation third
57% of 37 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 57% is upper-third health share (> 23%).
The verdict
Comstock lands in the middle third by violation volume (37), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (330; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 57% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 37
- Total EPA violations on record
- 57%
- Health-based (MCL / treatment failure)
- 330
- 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
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Lincoln
- School/Daycare
- No
- MCL Violations
- 20
- Monitoring Violations
- 16
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 20 | 2010 |
| Lead and Copper Rule | MR | 11 | 2024 |
| Revised Total Coliform Rule | MON | 3 | 2020 |
| Asbestos | MR | 2 | 2011 |
| Lead and Copper Rule | TT | 1 | 2010 |
Violation Count vs. the National Corpus
Comstock has 37 recorded EPA violations, 48% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 51% carry more. 57% of this system's own violations are health-based (21 of 37), 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)
37 Lower than most fewer violations than 51% 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 Comstock
21 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MT0004656.
Sources: EPA SDWIS
Nationwide peers
37 violations · 330 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Comstock
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.