MLchartDataset catalogue

Most impaired days

Term · Environment · MLC-T-ENV-017805

1. Average visibility impairment (measured in deciviews) for the twenty percent of monitored days in a calendar year with the highest amount of visibility impairment.

2. The twenty percent of monitored days in a calendar year with the highest amounts of anthropogenic visibility impairment.

Table 1. Record
IdentifierMLC-T-ENV-017805
FieldEnvironment
SubjectRegulatory activities
References40 CFR 51.301 (CFR 2013); 40 CFR 51.301 (CFR 2017)
Record as JSON 
{
  "id": "MLC-T-ENV-017805",
  "term": "Most impaired days",
  "field": "Environment",
  "term_source": "Most Impaired Days",
  "definition": "1. Average visibility impairment (measured in deciviews) for the twenty percent of monitored days in a calendar year with the highest amount of visibility impairment.\n\n2. The twenty percent of monitored days in a calendar year with the highest amounts of anthropogenic visibility impairment.",
  "subject": "Regulatory activities",
  "references": [
    "40 CFR 51.301 (CFR 2013)",
    "40 CFR 51.301 (CFR 2017)"
  ],
  "url": "https://mlchart.com/terminology/environment/most-impaired-days/"
}

Record 17,331 of 29,894 in Environment terminology (MLC-0121). Request the full dataset.