EPA Radon Zone

Source

EPA Radon Zones · vintage 2026 · refresh cadence: static

1 = high (>4 pCi/L expected), 2 = moderate, 3 = low

Direction of better

Lower values are better. Used to rank candidate towns/properties; lower score = stronger fit.

Unit

Values are reported in zone_1_3.

Where the data lives

Tables: municipality_metrics

Columns: radon_zone

Input field: radon_zone

JSON-LD example

Every value emitted by ValiFit (in /api/v1, MCP responses, on-page JSON-LD) carries a propertyID set to this metric_id, so AI clients can resolve it back here in one round-trip.

{
  "@type": "PropertyValue",
  "propertyID": "town.radon_zone",
  "name": "EPA Radon Zone",
  "value": "example",
  "unitText": "zone_1_3",
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "composite",
      "value": "Environment"
    },
    {
      "@type": "PropertyValue",
      "name": "level",
      "value": "city"
    },
    {
      "@type": "PropertyValue",
      "name": "direction",
      "value": "lower_better"
    },
    {
      "@type": "PropertyValue",
      "name": "source_year",
      "value": "2026"
    },
    {
      "@type": "PropertyValue",
      "name": "fha_safe",
      "value": true
    }
  ],
  "valueReference": {
    "@type": "QuantitativeValue",
    "additionalType": "https://valifit.com/catalog/metric",
    "identifier": "town.radon_zone",
    "sameAs": "EPA Radon Zones"
  }
}