Non-Transient Non-Community Water System · PWS 090400679
Quechan Casino Resort
Operator location Winterhaven, EPA Region 9 — Tribal Water Systems - 5% of 38 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 2,950 served per SDWIS.
- 2,950
- People served (this PWS)
- 38
- EPA violations (this PWS)
- 2
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Quechan Casino Resort standing, mid SDWIS violation third
5% of 38 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 5% is middle-third health share (≤ 23%). Population rank #10,799 of 29,740 among systems serving 500+.
The verdict
Quechan Casino Resort lands in the middle third by violation volume (38), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 2,950 (mid served population (≤ 3,309)). Health-based share is 5% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #10,799 of 29,740
- Population · /systems
- #48 of 129
- Population · 09
- 38
- 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.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Native American
- Connections
- 3
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 27
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 5 | 2013 |
| Dalapon | MR | 1 | 2020 |
| Glyphosate | MR | 1 | 2020 |
| OXAMYL | MR | 1 | 2020 |
| Picloram | MR | 1 | 2020 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2020 |
| Chlorine | MR | 1 | 2021 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2018 |
| TTHM | MR | 1 | 2018 |
| Coliform (TCR) | MCL | 1 | 2009 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2020 |
| 2,3,7,8-TCDD | MR | 1 | 2020 |
| Groundwater Rule | TT | 1 | 2021 |
| 2,4-D | MR | 1 | 2020 |
| 2,4,5-TP | MR | 1 | 2020 |
| Diquat | MR | 1 | 2020 |
| Lead and Copper Rule | MR | 1 | 2018 |
| Nitrate | MR | 1 | 2018 |
| Chlordane | MR | 1 | 2020 |
| Carbofuran | MR | 1 | 2020 |
| Endothall | MR | 1 | 2020 |
| Dinoseb | MR | 1 | 2020 |
| ETHYLENE DIBROMIDE | MR | 1 | 2020 |
| Toxaphene | MR | 1 | 2020 |
| Pentachlorophenol | MR | 1 | 2020 |
Violation Count vs. the National Corpus
Quechan Casino Resort has 38 recorded EPA violations, 49% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 50% carry more. 5% of this system's own violations are health-based (2 of 38), and it ranks #10,799 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)
38 Lower than most fewer violations than 50% 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 Quechan Casino Resort
2 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for 090400679.
Sources: EPA SDWIS
Nationwide peers
38 violations · 2,950 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 near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Quechan Casino Resort
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in EPA Region 9 — Tribal Water Systems compares on the same EPA violation measures. EPA Region 9 — Tribal Water Systems 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.