Non-Transient Non-Community Water System · PWS 101600016
Clearwater River Casino & Resort
Operator location Lewiston, EPA Region 10 — Tribal Water Systems - smaller served population (≤ 999) at 650 people served; 271 SDWIS violations on record from groundwater sources.
- 650
- People served (this PWS)
- 271
- EPA violations (this PWS)
- 19
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Clearwater River Casino & Resort standing, high SDWIS violation third
650 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 7% is middle-third health share (≤ 23%). Population rank #25,183 of 29,740 among systems serving 500+.
The verdict
Clearwater River Casino & Resort sits in the upper third of the sitemap cohort by violation count (271), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (650; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 7% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #25,183 of 29,740
- Population · /systems
- #43 of 52
- Population · 10
- 271
- Total EPA violations on record
- 7%
- 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
- 4
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 249
- Treatment Tech Violations
- 19
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 31 | 2016 |
| Revised Total Coliform Rule | MON | 19 | 2023 |
| Groundwater Rule | TT | 19 | 2019 |
| Nitrate | MR | 11 | 2019 |
| Chlorine | MR | 11 | 2017 |
| Lead and Copper Rule | MR | 5 | 2020 |
| CYANIDE | MR | 5 | 2017 |
| TTHM | MR | 4 | 2017 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2017 |
| 2,3,7,8-TCDD | MR | 3 | 2020 |
| DICHLOROMETHANE | MR | 3 | 2017 |
| o-Dichlorobenzene | MR | 3 | 2017 |
| p-Dichlorobenzene | MR | 3 | 2017 |
| Vinyl chloride | MR | 3 | 2017 |
| 1,1-Dichloroethylene | MR | 3 | 2017 |
| trans-1,2-Dichloroethylene | MR | 3 | 2017 |
| 1,1,1-Trichloroethane | MR | 3 | 2017 |
| Carbon tetrachloride | MR | 3 | 2017 |
| Tetrachloroethylene | MR | 3 | 2017 |
| Trichloroethylene | MR | 3 | 2017 |
| 1,1,2-Trichloroethane | MR | 3 | 2017 |
| CHLOROBENZENE | MR | 3 | 2017 |
| Benzene | MR | 3 | 2017 |
| Toluene | MR | 3 | 2017 |
| Ethylbenzene | MR | 3 | 2017 |
| Cadmium | MR | 3 | 2017 |
| Chromium | MR | 3 | 2017 |
| Fluoride | MR | 3 | 2017 |
| Mercury | MR | 3 | 2017 |
| Beryllium, Total | MR | 3 | 2017 |
Violation Count vs. the National Corpus
Clearwater River Casino & Resort has 271 recorded EPA violations, 89% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 10% carry more. 7% of this system's own violations are health-based (19 of 271), and it ranks #25,183 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)
271 Higher than most more violations than 89% 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
Population served record for Clearwater River Casino & Resort
EPA SDWIS lists 650 people served and 4 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
271 violations · 650 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.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Clearwater River 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 10 — Tribal Water Systems compares on the same EPA violation measures. EPA Region 10 — 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.