Working Level

{
  "id": "MLC-T-ENV-030597",
  "term": "Working Level",
  "field": "Environment",
  "definition": "1. A unit of measure for documenting exposure to radon decay products, the so-called \"daughters.\" One working level is equal to approximately 200 picocuries per liter.\n\n2. Any combination of short-lived radon decay products in one liter of air that will result in the ultimate emission of 1.3 x 10⁵ MeV of potential alpha energy. This number was chosen because it is approximately the alpha energy released from the decay products in equilibrium with 100 pCi of Ra-222. Exposures are measured in working level months (WLM).",
  "abbreviation": "WL",
  "subject": "Air",
  "references": [
    "Terms of Environment",
    "Radon Glossary of Terms"
  ],
  "url": "https://mlchart.com/terminology/environment/working-level/"
}