EPA radon zone for an address or county
EPA radon zone for an address or county. Perfect for: 'radon zone for an address', 'EPA radon potential for a county', 'is this a high radon area', 'radon zone 1 2 or 3 lookup'. Returns the EPA Map of Radon Zones county designation (1/2/3) for a point or explicit state+county, with a Zone 1 high-potential watch item and provenance. National. County-potential context only -- not a measured indoor radon reading. Charge-free when geocoding fails or the county is not matched.
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.locus.report/api/locus-radon-zone
| Category | Everything else |
|---|---|
| Provider host | api.locus.report |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.01 | 928 ms |
Example input (from the provider)
{
"body": {
"address": "1 E Edenton St, Raleigh, NC 27601"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"address": {
"maxLength": 200,
"minLength": 5,
"type": "string"
},
"county": {
"maxLength": 80,
"minLength": 3,
"type": "string"
},
"latitude": {
"maximum": 90,
"minimum": -90,
"type": "number"
},
"longitude": {
"maximum": 180,
"minimum": -180,
"type": "number"
},
"state": {
"maxLength": 2,
"minLength": 2,
"type": "string"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}