SmogRank / Chile / Ñuble

Air quality in San Carlos

Ñuble, Chile. PM2.5 from 1 reference monitor, updated hourly.

75US AQI
Moderate

Latest hour (08:00 UTC), 1.5× the WHO 24-hour guideline. PM2.5 22.0 µg/m³.

Rank, worst first

24 hours–not enough data
7 days#154of 2,594, at 76 US AQI (22.3 µg/m³)
30 days#255of 2,622, at 84 US AQI (26.8 µg/m³)
This year#224of 2,447, at 101 US AQI (35.6 µg/m³)

Why it ranks here

Seasonal. Over the past year its worst months were May, June, averaging up to 58.0 µg/m³ against 14.8 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on San Carlos'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: 13.8 µg/m³2025-11-02: 15.5 µg/m³2025-11-03: 15.6 µg/m³2025-11-04: 19.3 µg/m³2025-11-05: 16.9 µg/m³2025-11-06: 16.8 µg/m³2025-11-07: 19.5 µg/m³2025-11-08: 17.7 µg/m³2025-11-09: 16.5 µg/m³2025-11-10: 15.9 µg/m³2025-11-11: 14.0 µg/m³2025-11-12: 13.5 µg/m³2025-11-13: 14.0 µg/m³2025-11-14: 17.2 µg/m³2025-11-15: 18.0 µg/m³2025-11-16: 14.9 µg/m³2025-11-17: no data2025-11-18: 15.1 µg/m³2025-11-19: 17.6 µg/m³2025-11-20: 14.9 µg/m³2025-11-21: 14.3 µg/m³2025-11-22: 16.3 µg/m³2025-11-23: 18.0 µg/m³2025-11-24: 22.0 µg/m³2025-11-25: 20.5 µg/m³2025-11-26: 15.9 µg/m³2025-11-27: 15.2 µg/m³2025-11-28: 17.3 µg/m³2025-11-29: 15.9 µg/m³2025-11-30: 12.4 µg/m³2025-12-01: 13.0 µg/m³2025-12-02: 14.3 µg/m³2025-12-03: 15.5 µg/m³2025-12-04: no data2025-12-05: 17.7 µg/m³2025-12-06: 17.0 µg/m³2025-12-07: 18.5 µg/m³2025-12-08: 17.1 µg/m³2025-12-09: 14.6 µg/m³2025-12-10: 15.4 µg/m³2025-12-11: no data2025-12-12: 13.3 µg/m³2025-12-13: 12.8 µg/m³2025-12-14: 12.6 µg/m³2025-12-15: no data2025-12-16: 13.2 µg/m³2025-12-17: no data2025-12-18: 13.9 µg/m³2025-12-19: no data2025-12-20: 13.2 µg/m³2025-12-21: no data2025-12-22: 12.9 µg/m³2025-12-23: 14.5 µg/m³2025-12-24: no data2025-12-25: no data2025-12-26: 14.5 µg/m³2025-12-27: 13.7 µg/m³2025-12-28: 13.5 µg/m³2025-12-29: 16.3 µg/m³2025-12-30: 15.6 µg/m³2025-12-31: 17.4 µg/m³2026-01-01: 18.0 µg/m³2026-01-02: 20.6 µg/m³2026-01-03: 18.1 µg/m³2026-01-04: 15.9 µg/m³2026-01-05: 15.2 µg/m³2026-01-06: 13.2 µg/m³2026-01-07: 14.6 µg/m³2026-01-08: 16.4 µg/m³2026-01-09: 24.8 µg/m³2026-01-10: 30.3 µg/m³2026-01-11: 15.8 µg/m³2026-01-12: 14.5 µg/m³2026-01-13: no data2026-01-14: 15.8 µg/m³2026-01-15: 17.3 µg/m³2026-01-16: 15.1 µg/m³2026-01-17: 14.7 µg/m³2026-01-18: 22.0 µg/m³2026-01-19: 75.5 µg/m³2026-01-20: 77.6 µg/m³2026-01-21: 60.8 µg/m³2026-01-22: 34.3 µg/m³2026-01-23: 20.2 µg/m³2026-01-24: 18.1 µg/m³2026-01-25: 15.8 µg/m³2026-01-26: no data2026-01-27: 14.1 µg/m³2026-01-28: 15.7 µg/m³2026-01-29: 16.9 µg/m³2026-01-30: 15.4 µg/m³2026-01-31: 15.3 µg/m³2026-02-01: 17.5 µg/m³2026-02-02: no data2026-02-03: no data2026-02-04: 19.5 µg/m³2026-02-05: 13.7 µg/m³2026-02-06: 17.5 µg/m³2026-02-07: 16.8 µg/m³2026-02-08: no data2026-02-09: no data2026-02-10: no data2026-02-11: 13.8 µg/m³2026-02-12: no data2026-02-13: no data2026-02-14: 12.9 µg/m³2026-02-15: no data2026-02-16: no data2026-02-17: 15.3 µg/m³2026-02-18: no data2026-02-19: no data2026-02-20: 15.4 µg/m³2026-02-21: 17.7 µg/m³2026-02-22: 17.4 µg/m³2026-02-23: 18.1 µg/m³2026-02-24: 16.9 µg/m³2026-02-25: no data2026-02-26: no data2026-02-27: no data2026-02-28: 12.6 µg/m³2026-03-01: no data2026-03-02: 13.5 µg/m³2026-03-03: 14.5 µg/m³2026-03-04: no data2026-03-05: no data2026-03-06: 17.7 µg/m³2026-03-07: 16.2 µg/m³2026-03-08: 14.4 µg/m³2026-03-09: 14.6 µg/m³2026-03-10: 19.1 µg/m³2026-03-11: 20.4 µg/m³2026-03-12: 19.7 µg/m³2026-03-13: 18.8 µg/m³2026-03-14: 17.9 µg/m³2026-03-15: 13.9 µg/m³2026-03-16: 13.4 µg/m³2026-03-17: no data2026-03-18: 16.0 µg/m³2026-03-19: 16.7 µg/m³2026-03-20: no data2026-03-21: 14.4 µg/m³2026-03-22: 14.6 µg/m³2026-03-23: 19.5 µg/m³2026-03-24: 17.8 µg/m³2026-03-25: 17.7 µg/m³2026-03-26: 23.5 µg/m³2026-03-27: 33.8 µg/m³2026-03-28: 24.6 µg/m³2026-03-29: 21.8 µg/m³2026-03-30: 26.5 µg/m³2026-03-31: 18.4 µg/m³2026-04-01: 18.4 µg/m³2026-04-02: 23.3 µg/m³2026-04-03: 23.0 µg/m³2026-04-04: 18.0 µg/m³2026-04-05: 17.6 µg/m³2026-04-06: 18.5 µg/m³2026-04-07: 22.8 µg/m³2026-04-08: 30.8 µg/m³2026-04-09: no data2026-04-10: no data2026-04-11: 33.3 µg/m³2026-04-12: 29.1 µg/m³2026-04-13: 35.3 µg/m³2026-04-14: 54.0 µg/m³2026-04-15: 57.7 µg/m³2026-04-16: 39.8 µg/m³2026-04-17: 24.0 µg/m³2026-04-18: 19.5 µg/m³2026-04-19: 18.9 µg/m³2026-04-20: 24.7 µg/m³2026-04-21: 41.0 µg/m³2026-04-22: 30.7 µg/m³2026-04-23: 28.6 µg/m³2026-04-24: 34.5 µg/m³2026-04-25: 31.9 µg/m³2026-04-26: 31.9 µg/m³2026-04-27: 24.3 µg/m³2026-04-28: 47.8 µg/m³2026-04-29: 24.7 µg/m³2026-04-30: 31.8 µg/m³2026-05-01: 29.9 µg/m³2026-05-02: 33.5 µg/m³2026-05-03: 85.4 µg/m³2026-05-04: 31.2 µg/m³2026-05-05: 52.9 µg/m³2026-05-06: 20.5 µg/m³2026-05-07: 29.9 µg/m³2026-05-08: 38.7 µg/m³2026-05-09: 23.8 µg/m³2026-05-10: 23.3 µg/m³2026-05-11: 45.0 µg/m³2026-05-12: 114.0 µg/m³2026-05-13: 48.3 µg/m³2026-05-14: 46.1 µg/m³2026-05-15: 66.7 µg/m³2026-05-16: 27.0 µg/m³2026-05-17: 40.5 µg/m³2026-05-18: no data2026-05-19: no data2026-05-20: no data2026-05-21: no data2026-05-22: no data2026-05-23: 68.5 µg/m³2026-05-24: 64.8 µg/m³2026-05-25: 154.0 µg/m³2026-05-26: 154.0 µg/m³2026-05-27: 106.0 µg/m³2026-05-28: 39.9 µg/m³2026-05-29: 66.0 µg/m³2026-05-30: 60.4 µg/m³2026-05-31: 37.4 µg/m³2026-06-01: 30.3 µg/m³2026-06-02: 40.9 µg/m³2026-06-03: 48.0 µg/m³2026-06-04: 27.7 µg/m³2026-06-05: 38.6 µg/m³2026-06-06: 56.6 µg/m³2026-06-07: 68.0 µg/m³2026-06-08: 31.6 µg/m³2026-06-09: 30.3 µg/m³2026-06-10: 27.7 µg/m³2026-06-11: 50.8 µg/m³2026-06-12: 46.2 µg/m³2026-06-13: 37.4 µg/m³2026-06-14: 44.2 µg/m³2026-06-15: 93.0 µg/m³2026-06-16: 89.9 µg/m³2026-06-17: 75.8 µg/m³2026-06-18: 56.5 µg/m³2026-06-19: 132.0 µg/m³2026-06-20: 37.7 µg/m³2026-06-21: 26.5 µg/m³2026-06-22: 34.1 µg/m³2026-06-23: 35.0 µg/m³2026-06-24: 58.3 µg/m³2026-06-25: 145.0 µg/m³2026-06-26: 50.7 µg/m³2026-06-27: 38.8 µg/m³2026-06-28: 61.5 µg/m³2026-06-29: 29.0 µg/m³2026-06-30: 37.3 µg/m³2026-07-01: 67.2 µg/m³2026-07-02: 90.6 µg/m³2026-07-03: 126.0 µg/m³2026-07-04: 74.2 µg/m³2026-07-05: 103.0 µg/m³2026-07-06: 99.5 µg/m³2026-07-07: 95.4 µg/m³2026-07-08: 92.8 µg/m³2026-07-09: 31.3 µg/m³2026-07-10: 24.8 µg/m³2026-07-11: 27.5 µg/m³2026-07-12: 40.5 µg/m³2026-07-13: 34.2 µg/m³2026-07-14: 56.4 µg/m³2026-07-15: 16.7 µg/m³2026-07-16: 15.4 µg/m³2026-07-17: 14.1 µg/m³2026-07-18: no data2026-07-19: 21.8 µg/m³2026-07-20: 47.0 µg/m³2026-07-21: 44.2 µg/m³2026-07-22: 13.1 µg/m³2026-07-23: 14.1 µg/m³2026-07-24: 31.2 µg/m³2026-07-25: 33.8 µg/m³2026-07-26: 14.6 µg/m³2026-07-27: 13.4 µg/m³2026-07-28: 18.0 µg/m³2026-07-29: 54.5 µg/m³2026-07-30: 29.5 µg/m³2026-07-31: 14.2 µg/m³2026-08-01: 12.9 µg/m³2026-08-02: no data2026-08-03: 17.3 µg/m³2026-08-04: 22.8 µg/m³2026-08-05: 62.1 µg/m³2026-08-06: 22.3 µg/m³2026-08-07: 33.3 µg/m³2026-08-08: 19.0 µg/m³2026-08-09: 29.8 µg/m³2026-08-10: 47.0 µg/m³2026-08-11: 62.0 µg/m³2026-08-12: 69.0 µg/m³2026-08-13: 59.3 µg/m³2026-08-14: 37.8 µg/m³2026-08-15: 15.8 µg/m³2026-08-16: 23.2 µg/m³2026-08-17: 30.5 µg/m³2026-08-18: 80.8 µg/m³2026-08-19: 44.3 µg/m³2026-08-20: 64.8 µg/m³2026-08-21: no data2026-08-22: 38.7 µg/m³2026-08-23: 62.7 µg/m³2026-08-24: 117.0 µg/m³2026-08-25: 30.0 µg/m³2026-08-26: 16.4 µg/m³2026-08-27: 19.3 µg/m³2026-08-28: 14.6 µg/m³2026-08-29: 15.8 µg/m³2026-08-30: 41.7 µg/m³2026-08-31: 24.8 µg/m³2026-09-01: 34.3 µg/m³2026-09-02: 23.8 µg/m³2026-09-03: 39.6 µg/m³2026-09-04: 20.2 µg/m³2026-09-05: 17.2 µg/m³2026-09-06: 21.7 µg/m³2026-09-07: 34.5 µg/m³2026-09-08: 36.4 µg/m³2026-09-09: 39.0 µg/m³2026-09-10: 44.3 µg/m³2026-09-11: 28.4 µg/m³2026-09-12: 26.1 µg/m³2026-09-13: 22.0 µg/m³2026-09-14: 52.3 µg/m³2026-09-15: 26.3 µg/m³2026-09-16: 29.5 µg/m³2026-09-17: 22.6 µg/m³2026-09-18: 33.0 µg/m³2026-09-19: 28.8 µg/m³2026-09-20: 15.6 µg/m³2026-09-21: 20.5 µg/m³2026-09-22: no data2026-09-23: 20.8 µg/m³2026-09-24: 19.7 µg/m³2026-09-25: 15.2 µg/m³2026-09-26: 26.8 µg/m³2026-09-27: 23.5 µg/m³2026-09-28: 21.3 µg/m³2026-09-29: 21.8 µg/m³2026-09-30: 20.7 µg/m³2026-10-01: 26.5 µg/m³
261 of 313 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: 29.0 µg/m³2026-10-02 00:00 UTC: 26.0 µg/m³2026-10-02 01:00 UTC: 24.0 µg/m³2026-10-02 03:00 UTC: 24.0 µg/m³2026-10-02 05:00 UTC: 23.0 µg/m³2026-10-02 06:00 UTC: 22.0 µg/m³2026-10-02 07:00 UTC: 22.0 µg/m³2026-10-02 08:00 UTC: 22.0 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#109
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: 18.7 µg/m³Jan 2026: 23.5 µg/m³JanFeb 2025: 23.7 µg/m³Feb 2026: 16.1 µg/m³FebMar 2025: 20.2 µg/m³Mar 2026: 18.4 µg/m³MarApr 2025: 34.0 µg/m³Apr 2026: 29.9 µg/m³AprMay 2025: 54.0 µg/m³May 2026: 58.0 µg/m³MayJun 2025: 67.7 µg/m³Jun 2026: 52.6 µg/m³JunJul 2025: 57.7 µg/m³Jul 2026: 45.3 µg/m³JulAug 2025: 44.0 µg/m³Aug 2026: 39.1 µg/m³AugSep 2025: 27.5 µg/m³Sep 2026: 27.1 µg/m³SepOct 2025: 16.8 µg/m³OctNov 2025: 16.4 µg/m³NovDec 2025: 14.8 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 22.3 µg/m³22.320252025: 23.5 µg/m³23.52024no data20232023: 21.9 µg/m³21.9
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
San CarlosPermission 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, San Carlos, Chile, 6 Oct 2025 – 1 Oct 2026, smogrank.com/cl/san-carlos (accessed 2 Oct 2026).

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Other cities in Chile

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

Updated 2026-10-02 11:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.