Home hazard report for 73403 — Ardmore, OK
ZIP 73403 is served by Ardmore: 8 violations since 2016, latest lead result 0.7 ppb, PFAS not detected. Carter is in EPA radon zone 3.
Health-based violations since 2016: Carbon, Total, Interim Enhanced Surface Water Treatment Rule, Tthm. All are listed as resolved.
90th-percentile lead in the latest round (Jan 2026). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.
No active Superfund site within 10 miles of the ZIP center.
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Where ZIP 73403 is
blue: utility service area · scroll or pinch to zoomDrinking water: Ardmore
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Carbon, Total | 4 |
| Interim Enhanced Surface Water Treatment Rule | 2 |
| Tthm | 1 |
| Surface Water Treatment Rule | 1 |
A health-based violation means a contaminant exceeded its legal limit (MCL) or a required treatment technique was not met, as reported by the state to EPA’s SDWIS. All are listed as resolved or archived; the latest began May 2024.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| HFPO-DA (GenX) | not detected | 0 of 4 | — |
| PFBA | not detected | 0 of 4 | — |
| PFBS | not detected | 0 of 4 | — |
| PFPeA | not detected | 0 of 4 | — |
| PFHxS | not detected | 0 of 4 | — |
| PFHxA | not detected | 0 of 4 | — |
| PFHpA | not detected | 0 of 4 | — |
| PFNA | not detected | 0 of 4 | — |
| PFOS | not detected | 0 of 4 | 4 ppt MCL |
| PFOA | not detected | 0 of 4 | 4 ppt MCL |
| PFDA | not detected | 0 of 4 | — |
EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), samples 2023–2025; ppt = parts per trillion (ng/L). The 4.0 ppt maximum contaminant levels for PFOA and PFOS were set by EPA in 2024; water systems have until the end of the decade to comply.
Radon in Carter
EPA radon zone 3 — low potential. Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Imperial Refining Company Ardmore, Oklahoma · EPA ID OK0002024099 | Cleaned up & deleted | 2.5 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 73403
Who supplies drinking water to ZIP 73403?
Ardmore (EPA ID OK1010814), a surface water (rivers, lakes) system serving about 24,893 people.
Is there lead in Ardmore, OK tap water?
The utility’s latest 90th-percentile lead result (Jan 2026) was 0.7 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does Ardmore, OK water have PFAS?
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Has the water system in 73403 had violations?
Health-based violations since 2016: Carbon, Total, Interim Enhanced Surface Water Treatment Rule, Tthm. All are listed as resolved.
Are there Superfund sites near 73403?
No active Superfund site within 10 miles of the ZIP center. Sites within 10 miles: Imperial Refining Company (2.5 mi, Cleaned up & deleted).
Is radon a problem in Carter?
Carter is in EPA radon zone 3 (low potential). Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.