{"success":true,"forecast":{"2026-09-24":3.1,"2026-09-25":3.1,"2026-09-26":3.1,"2026-09-27":3.1,"2026-09-28":3.1,"2026-09-29":3.1,"2026-09-30":3.1},"uncertainty_pm25":2,"method":"7-day baseline with damped 7-vs-previous-7 trend","confidence":"low","caveat":"Baseline projection only; it does not use a meteorological or chemical transport model."}