{
 "_meta": {
  "what": "Delhi's official daily AQI for this autumn, against the middle half of the autumns of 2019 to 2025, by calendar date.",
  "source": "CPCB daily AQI bulletins. 2019-2025 from the UrbanEmissions.Info extraction (github.com/urbanemissionsinfo/AQI_bulletins); 2026 from data/raw/cpcb-bulletins-2026.csv.gz. Built by scripts/build-delhi-season.py.",
  "past_years": "2019-2025",
  "why_these_years": "Delhi's bulletin rested on a median of 5 stations in 2016 and 28 in 2018, and 33 to 37 from 2019 to 2025. Earlier years are left out so the band does not compare two different networks.",
  "no_mean": "No average AQI. The band is the median and the 25th to 75th percentile of the daily figure, date by date.",
  "min_years_per_date": 5
 },
 "window": [
  "2026-10-01",
  "2026-11-30"
 ],
 "diwali": {
  "2019": "2019-10-27",
  "2020": "2020-11-14",
  "2021": "2021-11-04",
  "2022": "2022-10-24",
  "2023": "2023-11-12",
  "2024": "2024-10-31",
  "2025": "2025-10-20",
  "2026": "2026-11-08"
 },
 "diwali_sources": "Gazetted public-holiday date each year: India Briefing's 2019 list of India's public holidays; the Government of India's 2020 holiday list; timeanddate.com's gazetted-holiday table for 2021 to 2026; and the central government 2026 holiday lists.",
 "aligned": {
  "2019": {
   "-7": 238,
   "-6": 249,
   "-5": 207,
   "-4": 242,
   "-3": 311,
   "-2": 284,
   "-1": 287,
   "0": 337,
   "1": 368,
   "2": 400,
   "3": 419,
   "4": 410,
   "5": 484,
   "6": 399,
   "7": 494
  },
  "2020": {
   "-7": 427,
   "-6": 416,
   "-5": 477,
   "-4": 476,
   "-3": 344,
   "-2": 314,
   "-1": 339,
   "0": 414,
   "1": 435,
   "2": 221,
   "3": 171,
   "4": 211,
   "5": 283,
   "6": 296,
   "7": 251
  },
  "2021": {
   "-7": 268,
   "-6": 283,
   "-5": 268,
   "-4": 289,
   "-3": 281,
   "-2": 303,
   "-1": 314,
   "0": 382,
   "1": 462,
   "2": 437,
   "3": 428,
   "4": 390,
   "5": 404,
   "6": 372,
   "7": 411
  },
  "2022": {
   "-7": 237,
   "-6": 241,
   "-5": 228,
   "-4": 232,
   "-3": 262,
   "-2": 265,
   "-1": 259,
   "0": 312,
   "1": 302,
   "2": 271,
   "3": 354,
   "4": 357,
   "5": 397,
   "6": 352,
   "7": 392
  },
  "2023": {
   "-7": 454,
   "-6": 421,
   "-5": 395,
   "-4": 426,
   "-3": 437,
   "-2": 279,
   "-1": 220,
   "0": 218,
   "1": 358,
   "2": 397,
   "3": 398,
   "4": 419,
   "5": 405,
   "6": 319,
   "7": 301
  },
  "2024": {
   "-7": 306,
   "-6": 270,
   "-5": 255,
   "-4": 356,
   "-3": 304,
   "-2": 268,
   "-1": 307,
   "0": 328,
   "1": 339,
   "2": 316,
   "3": 382,
   "4": 381,
   "5": 373,
   "6": 352,
   "7": 377
  },
  "2025": {
   "-7": 189,
   "-6": 211,
   "-5": 233,
   "-4": 245,
   "-3": 254,
   "-2": 268,
   "-1": 296,
   "0": 345,
   "1": 351,
   "2": 353,
   "3": 305,
   "4": 275,
   "5": 292,
   "6": 309,
   "7": 301
  },
  "2026": {
   "-7": 261,
   "-6": 324,
   "-5": 350,
   "-4": 377,
   "-3": 369
  }
 },
 "diwali_2026": "2026-11-08",
 "stations_2026_median": 54,
 "counts": {
  "Good": 0,
  "Satisfactory": 3,
  "Moderate": 23,
  "Poor": 6,
  "Very Poor": 4,
  "Severe": 0
 },
 "this_season": {
  "2026-10-01": {
   "aqi": 166,
   "category": "Moderate",
   "stations": 44
  },
  "2026-10-02": {
   "aqi": 174,
   "category": "Moderate",
   "stations": 43
  },
  "2026-10-03": {
   "aqi": 171,
   "category": "Moderate",
   "stations": 44
  },
  "2026-10-04": {
   "aqi": 187,
   "category": "Moderate",
   "stations": 43
  },
  "2026-10-05": {
   "aqi": 184,
   "category": "Moderate",
   "stations": 44
  },
  "2026-10-06": {
   "aqi": 179,
   "category": "Moderate",
   "stations": 44
  },
  "2026-10-07": {
   "aqi": 136,
   "category": "Moderate",
   "stations": 45
  },
  "2026-10-08": {
   "aqi": 162,
   "category": "Moderate",
   "stations": 44
  },
  "2026-10-09": {
   "aqi": 176,
   "category": "Moderate",
   "stations": 48
  },
  "2026-10-10": {
   "aqi": 122,
   "category": "Moderate",
   "stations": 46
  },
  "2026-10-11": {
   "aqi": 111,
   "category": "Moderate",
   "stations": 52
  },
  "2026-10-12": {
   "aqi": 83,
   "category": "Satisfactory",
   "stations": 51
  },
  "2026-10-13": {
   "aqi": 158,
   "category": "Moderate",
   "stations": 53
  },
  "2026-10-14": {
   "aqi": 181,
   "category": "Moderate",
   "stations": 56
  },
  "2026-10-15": {
   "aqi": 149,
   "category": "Moderate",
   "stations": 56
  },
  "2026-10-16": {
   "aqi": 90,
   "category": "Satisfactory",
   "stations": 54
  },
  "2026-10-17": {
   "aqi": 159,
   "category": "Moderate",
   "stations": 55
  },
  "2026-10-18": {
   "aqi": 187,
   "category": "Moderate",
   "stations": 58
  },
  "2026-10-19": {
   "aqi": 139,
   "category": "Moderate",
   "stations": 55
  },
  "2026-10-20": {
   "aqi": 179,
   "category": "Moderate",
   "stations": 54
  },
  "2026-10-21": {
   "aqi": 245,
   "category": "Poor",
   "stations": 55
  },
  "2026-10-22": {
   "aqi": 223,
   "category": "Poor",
   "stations": 54
  },
  "2026-10-23": {
   "aqi": 230,
   "category": "Poor",
   "stations": 56
  },
  "2026-10-24": {
   "aqi": 191,
   "category": "Moderate",
   "stations": 57
  },
  "2026-10-25": {
   "aqi": 153,
   "category": "Moderate",
   "stations": 52
  },
  "2026-10-26": {
   "aqi": 174,
   "category": "Moderate",
   "stations": 57
  },
  "2026-10-27": {
   "aqi": 197,
   "category": "Moderate",
   "stations": 55
  },
  "2026-10-28": {
   "aqi": 229,
   "category": "Poor",
   "stations": 58
  },
  "2026-10-29": {
   "aqi": 222,
   "category": "Poor",
   "stations": 58
  },
  "2026-10-30": {
   "aqi": 60,
   "category": "Satisfactory",
   "stations": 53
  },
  "2026-10-31": {
   "aqi": 117,
   "category": "Moderate",
   "stations": 58
  },
  "2026-11-01": {
   "aqi": 261,
   "category": "Poor",
   "stations": 57
  },
  "2026-11-02": {
   "aqi": 324,
   "category": "Very Poor",
   "stations": 58
  },
  "2026-11-03": {
   "aqi": 350,
   "category": "Very Poor",
   "stations": 57
  },
  "2026-11-04": {
   "aqi": 377,
   "category": "Very Poor",
   "stations": 59
  },
  "2026-11-05": {
   "aqi": 369,
   "category": "Very Poor",
   "stations": 59
  }
 },
 "past": {
  "10-01": {
   "n": 7,
   "q25": 119,
   "median": 147,
   "q75": 152
  },
  "10-02": {
   "n": 7,
   "q25": 124,
   "median": 146,
   "q75": 177
  },
  "10-03": {
   "n": 7,
   "q25": 116,
   "median": 136,
   "q75": 158
  },
  "10-04": {
   "n": 7,
   "q25": 119,
   "median": 150,
   "q75": 180
  },
  "10-05": {
   "n": 7,
   "q25": 130,
   "median": 159,
   "q75": 178
  },
  "10-06": {
   "n": 7,
   "q25": 110,
   "median": 127,
   "q75": 160
  },
  "10-07": {
   "n": 7,
   "q25": 100,
   "median": 127,
   "q75": 172
  },
  "10-08": {
   "n": 7,
   "q25": 96,
   "median": 164,
   "q75": 167
  },
  "10-09": {
   "n": 7,
   "q25": 132,
   "median": 171,
   "q75": 174
  },
  "10-10": {
   "n": 7,
   "q25": 150,
   "median": 170,
   "q75": 196
  },
  "10-11": {
   "n": 7,
   "q25": 154,
   "median": 193,
   "q75": 208
  },
  "10-12": {
   "n": 7,
   "q25": 161,
   "median": 179,
   "q75": 221
  },
  "10-13": {
   "n": 7,
   "q25": 180,
   "median": 224,
   "q75": 263
  },
  "10-14": {
   "n": 7,
   "q25": 196,
   "median": 234,
   "q75": 254
  },
  "10-15": {
   "n": 7,
   "q25": 198,
   "median": 233,
   "q75": 252
  },
  "10-16": {
   "n": 7,
   "q25": 231,
   "median": 239,
   "q75": 264
  },
  "10-17": {
   "n": 7,
   "q25": 246,
   "median": 284,
   "q75": 286
  },
  "10-18": {
   "n": 7,
   "q25": 185,
   "median": 248,
   "q75": 261
  },
  "10-19": {
   "n": 7,
   "q25": 141,
   "median": 228,
   "q75": 261
  },
  "10-20": {
   "n": 7,
   "q25": 222,
   "median": 232,
   "q75": 258
  },
  "10-21": {
   "n": 7,
   "q25": 248,
   "median": 256,
   "q75": 286
  },
  "10-22": {
   "n": 7,
   "q25": 236,
   "median": 296,
   "q75": 320
  },
  "10-23": {
   "n": 7,
   "q25": 250,
   "median": 263,
   "q75": 334
  },
  "10-24": {
   "n": 7,
   "q25": 248,
   "median": 306,
   "q75": 312
  },
  "10-25": {
   "n": 7,
   "q25": 256,
   "median": 284,
   "q75": 297
  },
  "10-26": {
   "n": 7,
   "q25": 256,
   "median": 271,
   "q75": 298
  },
  "10-27": {
   "n": 7,
   "q25": 281,
   "median": 312,
   "q75": 346
  },
  "10-28": {
   "n": 7,
   "q25": 296,
   "median": 304,
   "q75": 330
  },
  "10-29": {
   "n": 7,
   "q25": 281,
   "median": 325,
   "q75": 396
  },
  "10-30": {
   "n": 7,
   "q25": 327,
   "median": 352,
   "q75": 374
  },
  "10-31": {
   "n": 7,
   "q25": 308,
   "median": 359,
   "q75": 380
  },
  "11-01": {
   "n": 7,
   "q25": 321,
   "median": 364,
   "q75": 394
  },
  "11-02": {
   "n": 7,
   "q25": 310,
   "median": 366,
   "q75": 384
  },
  "11-03": {
   "n": 7,
   "q25": 312,
   "median": 382,
   "q75": 459
  },
  "11-04": {
   "n": 7,
   "q25": 362,
   "median": 382,
   "q75": 411
  },
  "11-05": {
   "n": 7,
   "q25": 348,
   "median": 381,
   "q75": 452
  },
  "11-06": {
   "n": 7,
   "q25": 325,
   "median": 352,
   "q75": 414
  },
  "11-07": {
   "n": 7,
   "q25": 338,
   "median": 377,
   "q75": 411
  },
  "11-08": {
   "n": 7,
   "q25": 366,
   "median": 380,
   "q75": 403
  },
  "11-09": {
   "n": 7,
   "q25": 318,
   "median": 370,
   "q75": 420
  },
  "11-10": {
   "n": 7,
   "q25": 308,
   "median": 334,
   "q75": 367
  },
  "11-11": {
   "n": 7,
   "q25": 345,
   "median": 352,
   "q75": 386
  },
  "11-12": {
   "n": 7,
   "q25": 308,
   "median": 334,
   "q75": 422
  },
  "11-13": {
   "n": 7,
   "q25": 348,
   "median": 404,
   "q75": 428
  },
  "11-14": {
   "n": 7,
   "q25": 358,
   "median": 397,
   "q75": 419
  },
  "11-15": {
   "n": 7,
   "q25": 370,
   "median": 396,
   "q75": 416
  },
  "11-16": {
   "n": 7,
   "q25": 310,
   "median": 377,
   "q75": 410
  },
  "11-17": {
   "n": 7,
   "q25": 238,
   "median": 351,
   "q75": 390
  },
  "11-18": {
   "n": 7,
   "q25": 252,
   "median": 319,
   "q75": 360
  },
  "11-19": {
   "n": 7,
   "q25": 282,
   "median": 301,
   "q75": 386
  },
  "11-20": {
   "n": 7,
   "q25": 308,
   "median": 348,
   "q75": 382
  },
  "11-21": {
   "n": 7,
   "q25": 330,
   "median": 364,
   "q75": 368
  },
  "11-22": {
   "n": 7,
   "q25": 292,
   "median": 360,
   "q75": 382
  },
  "11-23": {
   "n": 7,
   "q25": 292,
   "median": 312,
   "q75": 390
  },
  "11-24": {
   "n": 7,
   "q25": 276,
   "median": 361,
   "q75": 380
  },
  "11-25": {
   "n": 7,
   "q25": 322,
   "median": 353,
   "q75": 394
  },
  "11-26": {
   "n": 7,
   "q25": 314,
   "median": 336,
   "q75": 370
  },
  "11-27": {
   "n": 7,
   "q25": 220,
   "median": 328,
   "q75": 386
  },
  "11-28": {
   "n": 7,
   "q25": 272,
   "median": 325,
   "q75": 351
  },
  "11-29": {
   "n": 7,
   "q25": 273,
   "median": 305,
   "q75": 350
  },
  "11-30": {
   "n": 7,
   "q25": 298,
   "median": 328,
   "q75": 356
  }
 }
}