SmogRank / Chile / Maule Region

Air quality in Curicó

Maule Region, Chile. PM2.5 from 1 reference monitor, updated hourly.

79US AQI
Moderate

Latest hour (09:00 UTC), 1.6× the WHO 24-hour guideline. PM2.5 24.0 µg/m³.

Rank, worst first

24 hours–not enough data
7 days#202of 2,604, at 70 US AQI (19.4 µg/m³)
30 days#168of 2,622, at 80 US AQI (24.8 µg/m³)
This year#86of 2,444, at 109 US AQI (38.8 µg/m³)

Why it ranks here

Seasonal. Over the past year its worst months were May, June, July, averaging up to 61.5 µg/m³ against 18.8 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Curicó's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 17.8 µg/m³2025-11-02: no data2025-11-03: 18.6 µg/m³2025-11-04: 16.8 µg/m³2025-11-05: 18.4 µg/m³2025-11-06: 19.3 µg/m³2025-11-07: 19.5 µg/m³2025-11-08: 19.2 µg/m³2025-11-09: 19.5 µg/m³2025-11-10: 18.0 µg/m³2025-11-11: 17.0 µg/m³2025-11-12: 17.3 µg/m³2025-11-13: no data2025-11-14: 20.5 µg/m³2025-11-15: no data2025-11-16: 19.0 µg/m³2025-11-17: 18.5 µg/m³2025-11-18: 18.1 µg/m³2025-11-19: 18.2 µg/m³2025-11-20: 19.2 µg/m³2025-11-21: 19.5 µg/m³2025-11-22: 22.5 µg/m³2025-11-23: 23.4 µg/m³2025-11-24: 20.3 µg/m³2025-11-25: 18.8 µg/m³2025-11-26: 18.6 µg/m³2025-11-27: 18.5 µg/m³2025-11-28: 18.0 µg/m³2025-11-29: 16.5 µg/m³2025-11-30: 15.8 µg/m³2025-12-01: 16.5 µg/m³2025-12-02: 18.4 µg/m³2025-12-03: no data2025-12-04: 17.6 µg/m³2025-12-05: 19.1 µg/m³2025-12-06: 20.8 µg/m³2025-12-07: 21.4 µg/m³2025-12-08: 22.0 µg/m³2025-12-09: 22.1 µg/m³2025-12-10: 18.8 µg/m³2025-12-11: 17.6 µg/m³2025-12-12: no data2025-12-13: no data2025-12-14: no data2025-12-15: 23.5 µg/m³2025-12-16: 16.8 µg/m³2025-12-17: 19.0 µg/m³2025-12-18: 19.4 µg/m³2025-12-19: 19.4 µg/m³2025-12-20: 17.7 µg/m³2025-12-21: 16.9 µg/m³2025-12-22: 16.2 µg/m³2025-12-23: no data2025-12-24: 18.5 µg/m³2025-12-25: 17.0 µg/m³2025-12-26: 19.0 µg/m³2025-12-27: 25.5 µg/m³2025-12-28: 18.0 µg/m³2025-12-29: 18.6 µg/m³2025-12-30: 18.1 µg/m³2025-12-31: 19.8 µg/m³2026-01-01: 21.1 µg/m³2026-01-02: 19.8 µg/m³2026-01-03: 19.9 µg/m³2026-01-04: no data2026-01-05: 19.5 µg/m³2026-01-06: 17.9 µg/m³2026-01-07: 20.0 µg/m³2026-01-08: no data2026-01-09: 22.4 µg/m³2026-01-10: 21.4 µg/m³2026-01-11: 20.5 µg/m³2026-01-12: 18.0 µg/m³2026-01-13: no data2026-01-14: 18.8 µg/m³2026-01-15: 20.5 µg/m³2026-01-16: 20.9 µg/m³2026-01-17: 19.5 µg/m³2026-01-18: 24.9 µg/m³2026-01-19: 34.5 µg/m³2026-01-20: 35.2 µg/m³2026-01-21: 33.9 µg/m³2026-01-22: 34.7 µg/m³2026-01-23: 31.4 µg/m³2026-01-24: 25.0 µg/m³2026-01-25: 19.1 µg/m³2026-01-26: 17.8 µg/m³2026-01-27: no data2026-01-28: 18.8 µg/m³2026-01-29: 22.8 µg/m³2026-01-30: 19.1 µg/m³2026-01-31: 19.1 µg/m³2026-02-01: 19.8 µg/m³2026-02-02: 18.4 µg/m³2026-02-03: 15.5 µg/m³2026-02-04: 16.5 µg/m³2026-02-05: 17.6 µg/m³2026-02-06: no data2026-02-07: no data2026-02-08: 21.9 µg/m³2026-02-09: 17.7 µg/m³2026-02-10: 16.3 µg/m³2026-02-11: 17.3 µg/m³2026-02-12: no data2026-02-13: no data2026-02-14: no data2026-02-15: 22.9 µg/m³2026-02-16: 24.2 µg/m³2026-02-17: 18.7 µg/m³2026-02-18: no data2026-02-19: 19.8 µg/m³2026-02-20: 21.3 µg/m³2026-02-21: 22.9 µg/m³2026-02-22: 22.3 µg/m³2026-02-23: no data2026-02-24: 19.7 µg/m³2026-02-25: 19.3 µg/m³2026-02-26: 22.1 µg/m³2026-02-27: 20.5 µg/m³2026-02-28: 17.5 µg/m³2026-03-01: 19.3 µg/m³2026-03-02: 16.2 µg/m³2026-03-03: 17.6 µg/m³2026-03-04: 17.5 µg/m³2026-03-05: 19.0 µg/m³2026-03-06: 21.6 µg/m³2026-03-07: 20.3 µg/m³2026-03-08: 20.5 µg/m³2026-03-09: 19.5 µg/m³2026-03-10: 20.3 µg/m³2026-03-11: 20.8 µg/m³2026-03-12: 23.5 µg/m³2026-03-13: 22.8 µg/m³2026-03-14: 24.2 µg/m³2026-03-15: 17.5 µg/m³2026-03-16: 15.9 µg/m³2026-03-17: 15.1 µg/m³2026-03-18: no data2026-03-19: no data2026-03-20: no data2026-03-21: no data2026-03-22: 15.7 µg/m³2026-03-23: no data2026-03-24: no data2026-03-25: 16.8 µg/m³2026-03-26: 22.4 µg/m³2026-03-27: 36.0 µg/m³2026-03-28: 42.7 µg/m³2026-03-29: 20.1 µg/m³2026-03-30: 23.8 µg/m³2026-03-31: 26.1 µg/m³2026-04-01: 22.1 µg/m³2026-04-02: 30.4 µg/m³2026-04-03: 35.9 µg/m³2026-04-04: 23.4 µg/m³2026-04-05: 21.9 µg/m³2026-04-06: 19.9 µg/m³2026-04-07: 30.3 µg/m³2026-04-08: 33.7 µg/m³2026-04-09: 46.5 µg/m³2026-04-10: 36.9 µg/m³2026-04-11: 33.3 µg/m³2026-04-12: 24.1 µg/m³2026-04-13: 27.9 µg/m³2026-04-14: 30.5 µg/m³2026-04-15: 33.6 µg/m³2026-04-16: 42.8 µg/m³2026-04-17: 34.7 µg/m³2026-04-18: 20.0 µg/m³2026-04-19: 22.0 µg/m³2026-04-20: 25.6 µg/m³2026-04-21: 33.6 µg/m³2026-04-22: 34.0 µg/m³2026-04-23: 31.5 µg/m³2026-04-24: 48.4 µg/m³2026-04-25: 47.7 µg/m³2026-04-26: 32.8 µg/m³2026-04-27: 22.7 µg/m³2026-04-28: 39.6 µg/m³2026-04-29: 47.0 µg/m³2026-04-30: 30.0 µg/m³2026-05-01: 33.5 µg/m³2026-05-02: 33.0 µg/m³2026-05-03: 61.2 µg/m³2026-05-04: 62.1 µg/m³2026-05-05: 72.3 µg/m³2026-05-06: 31.9 µg/m³2026-05-07: 19.6 µg/m³2026-05-08: 22.0 µg/m³2026-05-09: 21.7 µg/m³2026-05-10: 24.5 µg/m³2026-05-11: 45.3 µg/m³2026-05-12: 43.9 µg/m³2026-05-13: 44.3 µg/m³2026-05-14: 56.2 µg/m³2026-05-15: 81.8 µg/m³2026-05-16: 47.5 µg/m³2026-05-17: 58.0 µg/m³2026-05-18: 88.3 µg/m³2026-05-19: 86.3 µg/m³2026-05-20: 106.0 µg/m³2026-05-21: 66.5 µg/m³2026-05-22: 56.7 µg/m³2026-05-23: 93.7 µg/m³2026-05-24: 92.4 µg/m³2026-05-25: 96.8 µg/m³2026-05-26: 84.7 µg/m³2026-05-27: 65.6 µg/m³2026-05-28: 68.8 µg/m³2026-05-29: 69.8 µg/m³2026-05-30: 96.2 µg/m³2026-05-31: 75.2 µg/m³2026-06-01: 45.2 µg/m³2026-06-02: 79.3 µg/m³2026-06-03: 91.0 µg/m³2026-06-04: 43.5 µg/m³2026-06-05: 57.8 µg/m³2026-06-06: 75.7 µg/m³2026-06-07: 60.9 µg/m³2026-06-08: 35.6 µg/m³2026-06-09: 46.9 µg/m³2026-06-10: 41.9 µg/m³2026-06-11: 41.7 µg/m³2026-06-12: 45.6 µg/m³2026-06-13: 42.3 µg/m³2026-06-14: 35.3 µg/m³2026-06-15: 35.6 µg/m³2026-06-16: 78.4 µg/m³2026-06-17: 94.9 µg/m³2026-06-18: 70.5 µg/m³2026-06-19: 72.0 µg/m³2026-06-20: 48.5 µg/m³2026-06-21: 45.3 µg/m³2026-06-22: 78.6 µg/m³2026-06-23: 37.8 µg/m³2026-06-24: 77.7 µg/m³2026-06-25: 107.0 µg/m³2026-06-26: 102.0 µg/m³2026-06-27: 41.9 µg/m³2026-06-28: 56.9 µg/m³2026-06-29: 33.6 µg/m³2026-06-30: 66.3 µg/m³2026-07-01: 42.9 µg/m³2026-07-02: 79.1 µg/m³2026-07-03: 104.0 µg/m³2026-07-04: 112.0 µg/m³2026-07-05: 103.0 µg/m³2026-07-06: 80.0 µg/m³2026-07-07: 111.0 µg/m³2026-07-08: 120.0 µg/m³2026-07-09: 79.1 µg/m³2026-07-10: 54.5 µg/m³2026-07-11: 56.6 µg/m³2026-07-12: 31.0 µg/m³2026-07-13: 65.5 µg/m³2026-07-14: 46.0 µg/m³2026-07-15: 40.7 µg/m³2026-07-16: 27.8 µg/m³2026-07-17: 19.3 µg/m³2026-07-18: 19.5 µg/m³2026-07-19: 44.5 µg/m³2026-07-20: 42.5 µg/m³2026-07-21: 26.4 µg/m³2026-07-22: 25.8 µg/m³2026-07-23: 31.5 µg/m³2026-07-24: 39.4 µg/m³2026-07-25: 42.0 µg/m³2026-07-26: 36.4 µg/m³2026-07-27: 20.8 µg/m³2026-07-28: 31.3 µg/m³2026-07-29: 65.6 µg/m³2026-07-30: 35.5 µg/m³2026-07-31: 21.4 µg/m³2026-08-01: 24.6 µg/m³2026-08-02: 26.3 µg/m³2026-08-03: 47.4 µg/m³2026-08-04: 25.5 µg/m³2026-08-05: 24.8 µg/m³2026-08-06: 21.7 µg/m³2026-08-07: 20.6 µg/m³2026-08-08: 23.8 µg/m³2026-08-09: 57.0 µg/m³2026-08-10: 46.6 µg/m³2026-08-11: 57.1 µg/m³2026-08-12: 60.5 µg/m³2026-08-13: 62.0 µg/m³2026-08-14: 48.8 µg/m³2026-08-15: 29.9 µg/m³2026-08-16: 40.2 µg/m³2026-08-17: 30.2 µg/m³2026-08-18: 74.1 µg/m³2026-08-19: 64.5 µg/m³2026-08-20: 44.0 µg/m³2026-08-21: 67.0 µg/m³2026-08-22: 74.6 µg/m³2026-08-23: 88.8 µg/m³2026-08-24: 73.5 µg/m³2026-08-25: 36.5 µg/m³2026-08-26: 22.7 µg/m³2026-08-27: 28.6 µg/m³2026-08-28: 25.2 µg/m³2026-08-29: 27.5 µg/m³2026-08-30: 22.2 µg/m³2026-08-31: 28.8 µg/m³2026-09-01: 33.5 µg/m³2026-09-02: 20.5 µg/m³2026-09-03: 18.8 µg/m³2026-09-04: 21.4 µg/m³2026-09-05: 26.8 µg/m³2026-09-06: 50.7 µg/m³2026-09-07: 26.3 µg/m³2026-09-08: 28.9 µg/m³2026-09-09: 26.1 µg/m³2026-09-10: 28.1 µg/m³2026-09-11: 26.1 µg/m³2026-09-12: 22.8 µg/m³2026-09-13: 23.7 µg/m³2026-09-14: 29.0 µg/m³2026-09-15: 30.0 µg/m³2026-09-16: 35.1 µg/m³2026-09-17: 28.1 µg/m³2026-09-18: 23.1 µg/m³2026-09-19: 23.5 µg/m³2026-09-20: 18.2 µg/m³2026-09-21: 20.2 µg/m³2026-09-22: 17.8 µg/m³2026-09-23: 31.0 µg/m³2026-09-24: 33.3 µg/m³2026-09-25: 23.1 µg/m³2026-09-26: 24.1 µg/m³2026-09-27: 14.4 µg/m³2026-09-28: 14.9 µg/m³2026-09-29: 18.8 µg/m³2026-09-30: 20.1 µg/m³2026-10-01: 20.5 µg/m³
329 of 331 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Last 4 days, hour by hour

15302026-10-01 22:00 UTC: 21.0 µg/m³2026-10-01 23:00 UTC: 21.0 µg/m³2026-10-02 00:00 UTC: 21.0 µg/m³2026-10-02 01:00 UTC: 22.0 µg/m³2026-10-02 02:00 UTC: 22.0 µg/m³2026-10-02 03:00 UTC: 22.0 µg/m³2026-10-02 04:00 UTC: 23.0 µg/m³2026-10-02 05:00 UTC: 23.0 µg/m³2026-10-02 06:00 UTC: 23.0 µg/m³2026-10-02 07:00 UTC: 24.0 µg/m³2026-10-02 08:00 UTC: 24.0 µg/m³2026-10-02 09:00 UTC: 24.0 µg/m³Sep 29Sep 30Oct 1Oct 2
Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Where it stood each day

Top 10Top 100#1#10#100#1,000#2,835NovDecJanFebMarAprMayJunJulAugSep#120
Its rank on each day's world board, #1 being the most polluted city that day. The scale is logarithmic: each step down is ten times as many cities. See it among every city.

2026 against 2025, month by month

15Jan 2025: 18.0 µg/m³Jan 2026: 22.8 µg/m³JanFeb 2025: 20.3 µg/m³Feb 2026: 19.6 µg/m³FebMar 2025: 20.2 µg/m³Mar 2026: 21.4 µg/m³MarApr 2025: 26.7 µg/m³Apr 2026: 32.1 µg/m³AprMay 2025: 50.3 µg/m³May 2026: 61.5 µg/m³MayJun 2025: 70.2 µg/m³Jun 2026: 59.7 µg/m³JunJul 2025: 67.3 µg/m³Jul 2026: 53.4 µg/m³JulAug 2025: 43.3 µg/m³Aug 2026: 42.7 µg/m³AugSep 2025: 28.6 µg/m³Sep 2026: 25.3 µg/m³SepOct 2025: 21.1 µg/m³OctNov 2025: 18.8 µg/m³NovDec 2025: 19.1 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 19.4 µg/m³19.420252025: 23.5 µg/m³23.520242024: 22.3 µg/m³22.320232023: 22.4 µg/m³22.4
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
CuricóPermission requested (Chile MMA, SINCA, 2026-10-01)Chile - SINCAReference

The city's value is the median of its reference monitors each hour, when at least a third of them report (three are always enough); low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Use this page

SmogRank, PM2.5 daily means, Curicó, Chile, 2 Oct 2025 – 1 Oct 2026, smogrank.com/cl/curico (accessed 2 Oct 2026).

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Other cities in Chile

30-day averages, US AQI. All of Chile.

Updated 2026-10-02 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.