Community Water System · PWS WY5680079
Ynp - Lake Village
Operator location Yellowstone, Wyoming - larger served population (> 3,309) at 5,925 people served; 41 SDWIS violations on record from groundwater sources.
- 5,925
- People served (this PWS) Larger third of systems
- 41
- EPA violations (this PWS) Middle third of systems
- 2
- Health-based (this PWS) Middle third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Ynp - Lake Village standing, mid SDWIS violation third
5,925 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 5% is middle-third health share (≤ 23%). Population rank #6,900 of 29,740 among systems serving 500+.
The verdict
Ynp - Lake Village lands in the middle third by violation volume (41), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (5,925; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 5% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #6,900 of 29,740
- Population · /systems
- #20 of 147
- Population · WY
- 41
- Total EPA violations on record
- 5%
- 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
- Federal
- Connections
- 683
- County
- Teton
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 39
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| E. COLI | MR | 3 | 2011 |
| Coliform (TCR) | MCL | 2 | 2013 |
| Revised Total Coliform Rule | MON | 2 | 2017 |
| Lead and Copper Rule | MR | 2 | 2024 |
| Pentachlorophenol | MR | 1 | 2023 |
| 2,4-D | MR | 1 | 2023 |
| Dalapon | MR | 1 | 2023 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2023 |
| cis-1,2-Dichloroethylene | MR | 1 | 2023 |
| Vinyl chloride | MR | 1 | 2023 |
| Carbon tetrachloride | MR | 1 | 2023 |
| 1,2-Dichloropropane | MR | 1 | 2023 |
| Trichloroethylene | MR | 1 | 2023 |
| 1,1,2-Trichloroethane | MR | 1 | 2023 |
| Tetrachloroethylene | MR | 1 | 2023 |
| CHLOROBENZENE | MR | 1 | 2023 |
| Benzene | MR | 1 | 2023 |
| Toluene | MR | 1 | 2023 |
| Ethylbenzene | MR | 1 | 2023 |
| Styrene | MR | 1 | 2023 |
| 2,4,5-TP | MR | 1 | 2023 |
| Diquat | MR | 1 | 2023 |
| TTHM | MR | 1 | 2024 |
| Coliform (TCR) | MR | 1 | 1993 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2024 |
| Dinoseb | MR | 1 | 2023 |
| DICHLOROMETHANE | MR | 1 | 2023 |
| 1,1-Dichloroethylene | MR | 1 | 2023 |
| o-Dichlorobenzene | MR | 1 | 2023 |
| p-Dichlorobenzene | MR | 1 | 2023 |
Violation Count vs. the National Corpus
Ynp - Lake Village has 41 recorded EPA violations, 51% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 48% carry more. 5% of this system's own violations are health-based (2 of 41), and it ranks #6,900 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)
41 Around the middle fewer violations than 48% 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
Ynp - Lake Village 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
Population served record for Ynp - Lake Village
EPA SDWIS lists 5,925 people served and 683 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
41 violations · 5,925 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.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Ynp - Lake Village
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Wyoming compares on the same EPA violation measures. Wyoming 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.