Oklahoma City
EPA ID: OK1020902 · 644,000 people served · 55 ZIP codes
ZipCheckup's reading of EPA SDWIS for Oklahoma City (OK1020902): no EPA violations recorded in the last five years. Federal monitoring records confirm Oklahoma City has operated without any EPA violations for the full five-year window - covering every contaminant category and reporting cycle across a service area of approximately 644,000 residents, with no gaps in the compliance record.
Data: EPA SDWIS
Service Area Map
Coverage area for Oklahoma City Source: EPA SDWIS service area boundaries.
Service area boundary - Grade A
Service Area Demographics
The Oklahoma City serves a community with a median household income of $68,432 and an estimated 1,053,855 residents across its service area. Approximately 56% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 41% 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?
Oklahoma City'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.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 71 detections recorded. 3 exceed federal EPA limits (4 ppt for PFOA/PFOS).
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
Oklahoma City (EPA ID: OK1020902) is a community water system in Oklahoma that serves approximately 644,000 people from surface water sources.
This system provides water to 55 ZIP codes across 12 communities.
ZIP-Area Home Safety Context: A (85/100)
This is the average Home Safety Score for 39 of 55 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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.
This system serves 55 ZIP codes:
73003 · 73007 · 73008 · 73012 · 73013 73020 · 73026 · 73034 · 73049 · 73064 73071 · 73078 · 73084 · 73097 · 73099 73102 · 73103 · 73104 · 73105 · 73106 73107 · 73108 · 73109 · 73111 · 73112 73114 · 73115 · 73116 · 73117 · 73118 73119 · 73120 · 73121 · 73122 · 73127 73128 · 73129 · 73131 · 73132 · 73134 73135 · 73139 · 73141 · 73142 · 73145 73149 · 73151 · 73159 · 73160 · 73162 73165 · 73169 · 73170 · 73173 · 73179
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Oklahoma City (OK1020902) on EPA.gov.
Frequently Asked Questions
Is Oklahoma City water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Oklahoma City in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Oklahoma City serve?
Oklahoma City serves approximately 644,000 people across 55 ZIP codes in Oklahoma.
Where does Oklahoma City get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Oklahoma City, OK: Serves 644K People. https://zipcheckup.com/water-system/ok1020902/
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