Washington
EPA ID: OK2004703 · 600 people served · 4 ZIP codes
Washington carries 1 open EPA violation that remain unresolved in the federal system — approximately 600 people fall within its service area.
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 7 (2022) to 15 (2024). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Washington Source: EPA SDWIS service area boundaries.
Service area boundary — Grade A
Service Area Demographics
The Washington serves a community with a median household income of $79,252 and an estimated 41,522 residents across its service area. Approximately 49% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 75% 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?
Washington's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 1% of homes in McClain 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 Washington compares to EPA limits
What This Means For You
Contaminant 2037 at 2 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Contaminant 2032 at 1 mg/L exceeds the EPA maximum of mg/L.
Contaminant 2326 at 1 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 1 detection recorded.
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
Washington (EPA ID: OK2004703) is a community water system in Oklahoma that serves approximately 600 people from groundwater sources.
This system provides water to 4 ZIP codes across 4 communities.
Average Home Safety Score: A (94/100)
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 |
|---|---|---|---|
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Resolved |
| October 1, 2024 | Contaminant 2037 | Monitoring | Resolved |
| January 1, 2024 | Contaminant 2326 | Monitoring | Resolved |
| January 1, 2023 | Contaminant 2037 | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Contaminant 2037 | Other Violation | 2 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Contaminant 2032 | Other Violation | 1 | No |
| Contaminant 2326 | Other Violation | 1 | No |
| Consumer Confidence Report Rule | Reporting Failure | 1 | No |
| Revised Total Coliform Rule | Microbiological | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 73093 | 0.00448 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: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by OK or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Washington (OK2004703) on EPA.gov.
Frequently Asked Questions
Is Washington water safe to drink?
Washington has recorded 1 health-based violation 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 Washington serve?
Washington serves approximately 600 people across 4 ZIP codes in Oklahoma.
Where does Washington get its water?
The primary water source is groundwater.
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 WASHINGTON 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: WASHINGTON 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 classification and chemical list sourced from WASHINGTON 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:
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 · DALAPON1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · DIQUAT1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · GLYPHOSATE1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · SIMAZINE1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · PICLORAM1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · DINOSEB1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · ATRAZINE1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · LASSO1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · 2,4-D1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · 2,4,5-TP1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · PENTACHLOROPHENOL1/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · SIMAZINE10/1/2024-12/31/2024
MONITORING, ROUTINE MAJOR
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monitoring · 2,4,5-TP1/1/2024-12/31/2024
Missing required monitoring sample
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monitoring · 2,4-D1/1/2024-12/31/2024
Missing required monitoring sample
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monitoring · ATRAZINE1/1/2024-12/31/2024
Missing required monitoring sample
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monitoring · DALAPON1/1/2024-12/31/2024
Missing required monitoring sample
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monitoring · DINOSEB1/1/2024-12/31/2024
Missing required monitoring sample
Violations record from WASHINGTON 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
Washington (EPA ID: OK2004703) — request the latest Consumer Confidence Report or ask about specific contaminants.