Community Water System · PWS 090400006
Covered Wells Regional
Operator location Sells, EPA Region 9 — Tribal Water Systems - smaller served population (≤ 999) at 538 people served; 23 SDWIS violations on record from groundwater sources.
- 538
- People served (this PWS)
- 23
- EPA violations (this PWS)
- 3
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Covered Wells Regional standing, mid SDWIS violation third
538 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 13% is middle-third health share (≤ 23%). Population rank #27,769 of 29,740 among systems serving 500+.
The verdict
Covered Wells Regional lands in the middle third by violation volume (23), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (538; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 13% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #27,769 of 29,740
- Population · /systems
- #125 of 129
- Population · 09
- 23
- Total EPA violations on record
- 13%
- 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
- Community
- Owner Type
- Native American
- Connections
- 184
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 11
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 3 | 2006 |
| Coliform (TCR) | MCL | 3 | 2005 |
| Dalapon | MR | 1 | 2004 |
| Picloram | MR | 1 | 2004 |
| 2,3,7,8-TCDD | MR | 1 | 2004 |
| 2,4-D | MR | 1 | 2004 |
| 2,4,5-TP | MR | 1 | 2004 |
| Pentachlorophenol | MR | 1 | 2004 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 2004 |
| Dinoseb | MR | 1 | 2004 |
Violation Count vs. the National Corpus
Covered Wells Regional has 23 recorded EPA violations, 35% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 64% carry more. 13% of this system's own violations are health-based (3 of 23), and it ranks #27,769 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)
23 Lower than most fewer violations than 64% 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 Covered Wells Regional
EPA SDWIS lists 538 people served and 184 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
23 violations · 538 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 smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Covered Wells Regional
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.