import { AqiType } from './types';
import { Pollutant } from './util';
/**
 * Converts a pollutant AQI into the raw PM25 level, in ug/m3, following the
 * EPAstandard, using {@link breakpointsUS}
 *
 * @param pollutant - The pollutant to convert
 * @param aqi - The raw value in ug/m3
 * @param aqiType - Whether the AQI is measured with the US standard or the
 * Chinese standard
 * @see https://www3.epa.gov/airnow/aqi-technical-assistance-document-sept2018.pdf
 */
export declare function rawToAqi(pollutant: Pollutant, raw: number, aqiType?: AqiType): number;
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