Atoka Company Rws & Swmd #4
EPA ID: OK1010412 · 3,000 people served · 9 ZIP codes
In the most recent EPA reporting cycle, Atoka Company Rws & Swmd #4 carried 30 violations still marked as unresolved — each remains active in the federal enforcement ledger while the utility continues operations for its service population of approximately 3,000 people across the area it supplies.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 18 (2024) to 117 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Atoka Company Rws & Swmd #4 Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The Atoka Company Rws & Swmd #4 serves a community with a median household income of $51,612 and an estimated 21,809 residents across its service area. Approximately 57% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 100% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
Atoka Company Rws & Swmd #4's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 2% of homes in Johnston County, Oklahoma rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Atoka Company Rws & Swmd #4 compares to EPA limits
What This Means For You
Contaminant 1009 at 1 mg/L exceeds the EPA maximum of 0.004 mg/L. Intestinal damage, bone damage. Consider reverse osmosis filtration.
Haloacetic Acids (HAA5) at 5 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Total Trihalomethanes (TTHM) at 4 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Chlorite at 22 mg/L exceeds the EPA maximum of 1 mg/L. Anemia and nervous system effects in infants and children. Consider ferrous sulfate reduction filtration.
Fecal Coliform at 9 presence exceeds the EPA maximum of presence.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 2 detections recorded.
Contaminant 1009 was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
Similar-sized systems in Oklahoma
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Atoka Company Rws & Swmd #4 (EPA ID: OK1010412) is a community water system in Oklahoma that serves approximately 3,000 people from surface water sources.
This system provides water to 9 ZIP codes across 8 communities.
Average Home Safety Score: B (75/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2025 | Fecal Coliform | Monitoring | Unresolved |
| July 1, 2025 | Contaminant 1008 | Monitoring | Unresolved |
| April 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| April 1, 2025 | Chlorite | Health-based | Unresolved |
| April 1, 2025 | Total Trihalomethanes (TTHM) | Health-based | Unresolved |
| January 1, 2025 | Fecal Coliform | Monitoring | Unresolved |
| January 1, 2025 | Contaminant 1008 | Monitoring | Unresolved |
| January 1, 2025 | Chlorite | Health-based | Unresolved |
| January 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| January 1, 2025 | Total Trihalomethanes (TTHM) | Health-based | Unresolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Resolved |
| October 1, 2024 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| October 1, 2024 | Chlorite | Health-based | Unresolved |
| October 1, 2024 | E. coli | Health-based | Resolved |
| August 1, 2024 | Contaminant 1009 | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Chlorite | Disinfection Byproducts | 22 | Yes |
| Fecal Coliform | Microbiological | 9 | Yes |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 5 | Yes |
| Contaminant 1008 | Other Violation | 4 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 4 | Yes |
| Stage 2 DBP Rule | Treatment Failure | 4 | Yes |
| Consumer Confidence Report Rule | Reporting Failure | 2 | No |
| Revised Total Coliform Rule | Microbiological | 2 | No |
| E. coli | Microbiological | 2 | Yes |
| Contaminant 1009 | Other Violation | 1 | No |
| Contaminant 2959 | Other Violation | 1 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
Health Risk Details
Chlorite (EPA limit: 1 mg/L)
Anemia and nervous system effects in infants and children At-risk groups: infants, developing fetuses, people with G6PD deficiency.
Removal methods: ferrous sulfate reduction, activated carbon, reverse osmosis. Find the right filter →
Haloacetic Acids (HAA5) (EPA limit: 0.06 mg/L)
Cancer risk; reproductive & developmental effects At-risk groups: pregnant women, infants, long-term consumers of chlorinated municipal water.
Removal methods: granular activated carbon (GAC), carbon block filter, reverse osmosis. Find the right filter →
Total Trihalomethanes (TTHM) (EPA limit: 0.08 mg/L)
Bladder & rectal cancer risk; reproductive concerns At-risk groups: pregnant women, long-term consumers of chlorinated water, people who frequently shower in chlorinated water.
Removal methods: granular activated carbon (GAC), carbon block filter, point-of-entry aeration. Find the right filter →
E. coli (EPA limit: Zero tolerance (any positive sample triggers immediate action))
Severe GI illness; potentially fatal kidney failure in children At-risk groups: children under 5, elderly, immunocompromised individuals, pregnant women.
Removal methods: UV disinfection (99.99%), chlorination, reverse osmosis. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 73461 | 0.00164 mg/L | No | N/A |
| 74525 | 0.00113 mg/L | No | N/A |
| 74542 | 0.00113 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 8 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 1 additional ZIP inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 73461 — Wapanucka
- 74525 — Atoka
- 74533 — Caney
- 74538 — Coalgate
- 74542 — Atoka
- 74555 — Lane
- 74569 — Stringtown
- 74727 — Boswell
- 74729 — Caddo
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Atoka Company Rws & Swmd #4 (OK1010412) on EPA.gov.
Frequently Asked Questions
Is Atoka Company Rws & Swmd #4 water safe to drink?
Atoka Company Rws & Swmd #4 has recorded 39 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Atoka Company Rws & Swmd #4 serve?
Atoka Company Rws & Swmd #4 serves approximately 3,000 people across 9 ZIP codes in Oklahoma.
Where does Atoka Company Rws & Swmd #4 get its water?
The primary water source is surface water.
Contact Your Water Utility
Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.
Contact information from ATOKA CO. RWS & SWMD #4 Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: ATOKA CO. RWS & SWMD #4 Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Treatment regime
How this utility classifies its treatment process and what each reported treatment chemical does.
Treatment chemicals and what each one does
Chemical names are reported verbatim by the utility. Purpose categories are ZipCheckup annotations based on standard drinking-water treatment practice.
Treatment classification and chemical list sourced from ATOKA CO. RWS & SWMD #4 Consumer Confidence Report.
Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Notable events and violations
This section summarizes events the utility chose to disclose in its most recent Consumer Confidence Report, plus any federal compliance violations the utility recorded against itself. Both lists are utility-authored — ZipCheckup does not audit, judge, or reorder them.
Federal compliance violations on record
These entries are taken verbatim from the utility's CCR violations section. EPA defines four broad violation categories: Maximum Contaminant Level (MCL), Treatment Technique (TT), Monitoring & Reporting (M&R), and Public Notification (PN).
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monitoring · TOTAL ORGANIC CARBON2024-01-01/2024-03-31
INADEQUATE DBP PRECURSOR REMOVAL
-
MCL · TOTAL HALOACETIC ACIDS (HAA5)2024-04-01/2024-06-30
MCL, LRAA
-
MCL · TTHM2024-04-01/2024-06-30
MCL, LRAA
-
MCL · TOTAL HALOACETIC ACIDS (HAA5)2024-07-01/2024-09-30
MCL, LRAA
-
MCL · TTHM2024-07-01/2024-09-30
MCL, LRAA
-
MCL · TOTAL HALOACETIC ACIDS (HAA5)2024-10-01/2024-12-31
MCL, LRAA
-
MCL · TTHM2024-10-01/2024-12-31
MCL, LRAA
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monitoring · TOTAL ORGANIC CARBON2024-04-01/2024-06-30
MONITORING, ROUTINE (DBP), MAJOR
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monitoring · TOTAL ORGANIC CARBON2024-07-01/2024-09-30
INADEQUATE DBP PRECURSOR REMOVAL
-
monitoring · TOTAL ORGANIC CARBON2024-10-01/2024-12-31
INADEQUATE DBP PRECURSOR REMOVAL
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monitoring · TOTAL ORGANIC CARBON2024-01-31/2024-03-31
INADEQUATE DBP PRECURSOR REMOVAL
Violations record from ATOKA CO. RWS & SWMD #4 Consumer Confidence Report.
ZipCheckup note: items above reflect what the utility published in its most recent CCR. Federal violation records are also tracked separately by the EPA Safe Drinking Water Information System (SDWIS) — the SDWIS record is the authoritative federal source for any specific regulatory action.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Atoka Company Rws & Swmd #4 (EPA ID: OK1010412) — request the latest Consumer Confidence Report or ask about specific contaminants.