import type { WaterActivityInput, WaterActivityResult } from './types.js';
/**
 * Water Activity Microbial Safety Assessment — HACCP
 *
 * @formula Threshold-based microbial growth risk:
 *   - Bacteria: aw > 0.91
 *   - Yeast: aw > 0.88
 *   - Mold: aw > 0.80
 *   - Xerophilic fungi: aw > 0.65
 *   - Stable (no growth): aw < 0.60
 *
 * @reference FDA Food Code
 * @reference ICMSF "Microorganisms in Foods 6"
 * @reference Scott, W.J. (1957). Water relations of food spoilage microorganisms.
 */
export declare function waterActivity(input: WaterActivityInput): WaterActivityResult;
//# sourceMappingURL=waterActivity.d.ts.map