Community Water System · PWS OK1010412
Atoka Co. RWS & Swmd #4
Operator location Atoka, Oklahoma - 80% of 886 violations are health-based (upper-third health share (> 23%)); surface water source; 3,000 served per SDWIS.
- 3,000
- People served (this PWS)
- 886
- EPA violations (this PWS)
- 710
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Atoka Co. RWS & Swmd #4 standing, high SDWIS violation third
80% of 886 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 80% is upper-third health share (> 23%). Population rank #10,666 of 29,740 among systems serving 500+.
The verdict
Atoka Co. RWS & Swmd #4 sits in the upper third of the sitemap cohort by violation count (886), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 3,000 (mid served population (≤ 3,309)). Health-based share is 80% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #10,666 of 29,740
- Population · /systems
- #157 of 558
- Population · OK
- 886
- Total EPA violations on record
- 80%
- 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
- 3,197
- County
- Atoka
- School/Daycare
- No
- MCL Violations
- 421
- Monitoring Violations
- 169
- Treatment Tech Violations
- 289
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| CARBON, TOTAL | TT | 278 | 2025 |
| Total Haloacetic Acids (HAA5) | MCL | 218 | 2025 |
| TTHM | MCL | 203 | 2025 |
| CARBON, TOTAL | MR | 42 | 2012 |
| Total Haloacetic Acids (HAA5) | MR | 24 | 2024 |
| TTHM | MR | 18 | 2024 |
| Chlorine dioxide | MR | 14 | 2025 |
| Interim Enhanced Surface Water Treatment Rule | MR | 14 | 2025 |
| Coliform (TCR) | MR | 11 | 2012 |
| Interim Enhanced Surface Water Treatment Rule | TT | 8 | 2006 |
| Chlorine | MR | 8 | 2021 |
| Revised Total Coliform Rule | MON | 8 | 2021 |
| Chlorite | MR | 4 | 2018 |
| Lead and Copper Rule | MR | 3 | 2009 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| Surface Water Treatment Rule | MR | 2 | 2002 |
| Surface Water Treatment Rule | TT | 1 | 1994 |
| cis-1,2-Dichloroethylene | MR | 1 | 2010 |
| Xylenes, Total | MR | 1 | 2010 |
| DICHLOROMETHANE | MR | 1 | 2010 |
| o-Dichlorobenzene | MR | 1 | 2010 |
| p-Dichlorobenzene | MR | 1 | 2010 |
| 1,1-Dichloroethylene | MR | 1 | 2010 |
| trans-1,2-Dichloroethylene | MR | 1 | 2010 |
| 1,2-Dichloroethane | MR | 1 | 2010 |
| 1,1,1-Trichloroethane | MR | 1 | 2010 |
| CHLOROBENZENE | MR | 1 | 2010 |
| Ethylbenzene | MR | 1 | 2010 |
| Benzene | MR | 1 | 2010 |
Violation Count vs. the National Corpus
Atoka Co. RWS & Swmd #4 has 886 recorded EPA violations, 99% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 1% carry more. 80% of this system's own violations are health-based (710 of 886), and it ranks #10,666 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)
886 Higher than most more violations than 99% 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 Atoka Co. RWS & Swmd #4
710 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OK1010412.
Sources: EPA SDWIS
Nationwide peers
886 violations · 3,000 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 near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Atoka Co. RWS & Swmd #4
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.