Non-Transient Non-Community Water System · PWS MT0002916
Golden Sunlight Mines Inc
Operator location Whitehall, Montana - 41% of 536 violations are health-based (upper-third health share (> 23%)); surface water source; 160 served per SDWIS.
- 160
- People served (this PWS)
- 536
- EPA violations (this PWS)
- 220
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Golden Sunlight Mines Inc standing, high SDWIS violation third
41% of 536 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 41% is upper-third health share (> 23%).
The verdict
Golden Sunlight Mines Inc sits in the upper third of the sitemap cohort by violation count (536), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (160; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 41% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 536
- Total EPA violations on record
- 41%
- Health-based (MCL / treatment failure)
- 160
- 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
- 9
- County
- Jefferson
- School/Daycare
- No
- MCL Violations
- 84
- Monitoring Violations
- 315
- Treatment Tech Violations
- 136
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | TT | 94 | 2008 |
| TTHM | MCL | 44 | 2010 |
| Surface Water Treatment Rule | TT | 42 | 2023 |
| Total Haloacetic Acids (HAA5) | MCL | 35 | 2009 |
| Coliform (TCR) | MR | 31 | 2009 |
| Surface Water Treatment Rule | MR | 21 | 2005 |
| Lead and Copper Rule | MR | 7 | 2004 |
| Endrin | MR | 5 | 2002 |
| BHC-GAMMA | MR | 5 | 2002 |
| Toxaphene | MR | 5 | 2002 |
| Dalapon | MR | 5 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 5 | 2002 |
| Dinoseb | MR | 5 | 2002 |
| Aldicarb sulfoxide | MR | 5 | 2002 |
| Aldicarb sulfone | MR | 5 | 2002 |
| Carbofuran | MR | 5 | 2002 |
| Aldicarb | MR | 5 | 2002 |
| Atrazine | MR | 5 | 2002 |
| LASSO | MR | 5 | 2002 |
| Heptachlor | MR | 5 | 2002 |
| 2,4-D | MR | 5 | 2002 |
| 2,4,5-TP | MR | 5 | 2002 |
| Pentachlorophenol | MR | 5 | 2002 |
| cis-1,2-Dichloroethylene | MR | 5 | 2008 |
| o-Dichlorobenzene | MR | 5 | 2008 |
| Vinyl chloride | MR | 5 | 2008 |
| Trichloroethylene | MR | 5 | 2008 |
| 1,1,2-Trichloroethane | MR | 5 | 2008 |
| Tetrachloroethylene | MR | 5 | 2008 |
| CHLOROBENZENE | MR | 5 | 2008 |
Violation Count vs. the National Corpus
Golden Sunlight Mines Inc has 536 recorded EPA violations, 96% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 4% carry more. 41% of this system's own violations are health-based (220 of 536), 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)
536 Higher than most more violations than 96% 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 Golden Sunlight Mines Inc
220 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MT0002916.
Sources: EPA SDWIS
Nationwide peers
536 violations · 160 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 Golden Sunlight Mines Inc
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.