Community Water System · PWS OK3002157
Delaware Co Rwsg&swm District 11
Operator location Twin Oaks, Oklahoma - smaller served population (≤ 999) at 750 people served; 69 SDWIS violations on record from surface water sources.
- 750
- People served (this PWS)
- 69
- EPA violations (this PWS)
- 1
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Delaware Co Rwsg&swm District 11 standing, mid SDWIS violation third
750 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 1% is middle-third health share (≤ 23%). Population rank #23,481 of 29,740 among systems serving 500+.
The verdict
Delaware Co Rwsg&swm District 11 lands in the middle third by violation volume (69), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (750; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 1% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #23,481 of 29,740
- Population · /systems
- #475 of 558
- Population · OK
- 69
- Total EPA violations on record
- 1%
- 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
- Local
- Connections
- 300
- County
- Delaware
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 34
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 30 | 2024 |
| Lead and Copper Rule | MR | 10 | 2012 |
| Revised Total Coliform Rule | MON | 8 | 2022 |
| Chlorine | MR | 8 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2020 |
| TTHM | MR | 4 | 2020 |
| Public Notice | Other | 2 | 2022 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
Violation Count vs. the National Corpus
Delaware Co Rwsg&swm District 11 has 69 recorded EPA violations, 65% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 35% carry more. 1% of this system's own violations are health-based (1 of 69), and it ranks #23,481 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)
69 Around the middle fewer violations than 35% 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 Delaware Co Rwsg&swm District 11
EPA SDWIS lists 750 people served and 300 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
69 violations · 750 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 Delaware Co Rwsg&swm District 11
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Oklahoma compares on the same EPA violation measures. Oklahoma 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.