SmogRank / Chile / Atacama

Air quality in Huasco

Atacama, Chile. Over the last 7 days its air rated Moderate, the 128th most polluted of 2,680 cities measured.

Latest hour69US AQI
Moderate

PM2.5 18.5 µg/m³, 1.2× the WHO 24-hour guideline, at local time on 4 Oct. Too few hours in the last 24 for a 24-hour average.

Last 7 days: about usual for early October (18.3 µg/m³).

Where Huasco ranks

24 hours–not enough data
7 days#128of 2,680, at 66 US AQI (17.3 µg/m³)
30 days#306of 2,888, at 67 US AQI (17.6 µg/m³)
This year#432of 2,734, at 67 US AQI (17.7 µg/m³)

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 15.7 µg/m³2025-11-02: 16.7 µg/m³2025-11-03: 16.6 µg/m³2025-11-04: 16.0 µg/m³2025-11-05: no daily value, readings left out by our checks (a stuck monitor, error codes, or a reading its neighbours contradict)2025-11-06: 15.4 µg/m³2025-11-07: 15.3 µg/m³2025-11-08: 18.1 µg/m³2025-11-09: 19.0 µg/m³2025-11-10: 17.4 µg/m³2025-11-11: 17.5 µg/m³2025-11-12: 18.8 µg/m³2025-11-13: 20.6 µg/m³2025-11-14: 20.6 µg/m³2025-11-15: 18.9 µg/m³2025-11-16: 17.7 µg/m³2025-11-17: 18.7 µg/m³2025-11-18: 15.8 µg/m³2025-11-19: 13.7 µg/m³2025-11-20: 14.5 µg/m³2025-11-21: 15.3 µg/m³2025-11-22: 15.6 µg/m³2025-11-23: 16.6 µg/m³2025-11-24: 15.0 µg/m³2025-11-25: 15.2 µg/m³2025-11-26: 14.7 µg/m³2025-11-27: 15.2 µg/m³2025-11-28: 14.6 µg/m³2025-11-29: 17.0 µg/m³2025-11-30: 15.5 µg/m³2025-12-01: 15.8 µg/m³2025-12-02: 16.4 µg/m³2025-12-03: 17.5 µg/m³2025-12-04: 14.1 µg/m³2025-12-05: 14.0 µg/m³2025-12-06: 12.6 µg/m³2025-12-07: 12.6 µg/m³2025-12-08: 13.9 µg/m³2025-12-09: 14.9 µg/m³2025-12-10: 14.5 µg/m³2025-12-11: 13.6 µg/m³2025-12-12: 14.3 µg/m³2025-12-13: 15.3 µg/m³2025-12-14: 14.5 µg/m³2025-12-15: 17.3 µg/m³2025-12-16: 19.9 µg/m³2025-12-17: 21.5 µg/m³2025-12-18: 16.9 µg/m³2025-12-19: 16.5 µg/m³2025-12-20: 14.2 µg/m³2025-12-21: 14.5 µg/m³2025-12-22: 14.1 µg/m³2025-12-23: 16.1 µg/m³2025-12-24: 16.9 µg/m³2025-12-25: 18.5 µg/m³2025-12-26: 15.8 µg/m³2025-12-27: 16.1 µg/m³2025-12-28: 16.0 µg/m³2025-12-29: 18.0 µg/m³2025-12-30: 18.2 µg/m³2025-12-31: 15.8 µg/m³2026-01-01: 17.3 µg/m³2026-01-02: 13.0 µg/m³2026-01-03: 13.5 µg/m³2026-01-04: 14.9 µg/m³2026-01-05: 14.8 µg/m³2026-01-06: 15.8 µg/m³2026-01-07: 15.0 µg/m³2026-01-08: 14.9 µg/m³2026-01-09: 15.0 µg/m³2026-01-10: 17.5 µg/m³2026-01-11: 17.0 µg/m³2026-01-12: 15.5 µg/m³2026-01-13: 16.0 µg/m³2026-01-14: 16.2 µg/m³2026-01-15: 15.3 µg/m³2026-01-16: 20.8 µg/m³2026-01-17: 22.6 µg/m³2026-01-18: 21.5 µg/m³2026-01-19: 20.6 µg/m³2026-01-20: 20.4 µg/m³2026-01-21: 22.0 µg/m³2026-01-22: 19.7 µg/m³2026-01-23: 16.5 µg/m³2026-01-24: 15.7 µg/m³2026-01-25: 15.5 µg/m³2026-01-26: 14.1 µg/m³2026-01-27: 13.4 µg/m³2026-01-28: 15.4 µg/m³2026-01-29: 15.4 µg/m³2026-01-30: 15.2 µg/m³2026-01-31: 13.1 µg/m³2026-02-01: 16.3 µg/m³2026-02-02: 14.6 µg/m³2026-02-03: no daily value, readings left out by our checks (a stuck monitor, error codes, or a reading its neighbours contradict)2026-02-04: 12.8 µg/m³2026-02-05: 15.1 µg/m³2026-02-06: 15.5 µg/m³2026-02-07: 20.4 µg/m³2026-02-08: 20.9 µg/m³2026-02-09: 14.9 µg/m³2026-02-10: 17.7 µg/m³2026-02-11: 18.5 µg/m³2026-02-12: 20.8 µg/m³2026-02-13: 20.5 µg/m³2026-02-14: 22.6 µg/m³2026-02-15: 16.4 µg/m³2026-02-16: 16.6 µg/m³2026-02-17: 15.5 µg/m³2026-02-18: 17.0 µg/m³2026-02-19: 19.2 µg/m³2026-02-20: 18.6 µg/m³2026-02-21: 19.3 µg/m³2026-02-22: 17.1 µg/m³2026-02-23: 17.7 µg/m³2026-02-24: 18.4 µg/m³2026-02-25: 17.9 µg/m³2026-02-26: 17.2 µg/m³2026-02-27: 15.3 µg/m³2026-02-28: 15.8 µg/m³2026-03-01: 16.7 µg/m³2026-03-02: 14.0 µg/m³2026-03-03: 14.4 µg/m³2026-03-04: 19.6 µg/m³2026-03-05: 17.0 µg/m³2026-03-06: 16.3 µg/m³2026-03-07: 16.3 µg/m³2026-03-08: 14.0 µg/m³2026-03-09: 14.8 µg/m³2026-03-10: 16.1 µg/m³2026-03-11: 16.7 µg/m³2026-03-12: 15.3 µg/m³2026-03-13: 15.7 µg/m³2026-03-14: 16.5 µg/m³2026-03-15: 15.9 µg/m³2026-03-16: 13.7 µg/m³2026-03-17: 14.0 µg/m³2026-03-18: 14.9 µg/m³2026-03-19: 15.3 µg/m³2026-03-20: 13.2 µg/m³2026-03-21: 13.7 µg/m³2026-03-22: 16.5 µg/m³2026-03-23: 16.1 µg/m³2026-03-24: 18.9 µg/m³2026-03-25: 16.8 µg/m³2026-03-26: 17.7 µg/m³2026-03-27: 22.3 µg/m³2026-03-28: 18.0 µg/m³2026-03-29: 19.2 µg/m³2026-03-30: 15.8 µg/m³2026-03-31: 15.8 µg/m³2026-04-01: 17.9 µg/m³2026-04-02: 18.2 µg/m³2026-04-03: 20.2 µg/m³2026-04-04: 20.8 µg/m³2026-04-05: 19.3 µg/m³2026-04-06: 16.2 µg/m³2026-04-07: 16.6 µg/m³2026-04-08: 16.9 µg/m³2026-04-09: 19.7 µg/m³2026-04-10: 14.3 µg/m³2026-04-11: 14.9 µg/m³2026-04-12: 17.6 µg/m³2026-04-13: 17.3 µg/m³2026-04-14: 14.7 µg/m³2026-04-15: 16.3 µg/m³2026-04-16: 18.3 µg/m³2026-04-17: 18.0 µg/m³2026-04-18: 17.7 µg/m³2026-04-19: 16.2 µg/m³2026-04-20: 15.0 µg/m³2026-04-21: 16.1 µg/m³2026-04-22: 18.0 µg/m³2026-04-23: 20.0 µg/m³2026-04-24: 24.9 µg/m³2026-04-25: 21.8 µg/m³2026-04-26: 18.8 µg/m³2026-04-27: 17.3 µg/m³2026-04-28: 18.3 µg/m³2026-04-29: 18.9 µg/m³2026-04-30: 16.3 µg/m³2026-05-01: 14.8 µg/m³2026-05-02: 19.3 µg/m³2026-05-03: 18.4 µg/m³2026-05-04: 16.5 µg/m³2026-05-05: 16.4 µg/m³2026-05-06: 13.9 µg/m³2026-05-07: 17.0 µg/m³2026-05-08: 24.0 µg/m³2026-05-09: 19.2 µg/m³2026-05-10: 19.0 µg/m³2026-05-11: 18.3 µg/m³2026-05-12: 14.4 µg/m³2026-05-13: 15.1 µg/m³2026-05-14: 17.9 µg/m³2026-05-15: 20.9 µg/m³2026-05-16: 24.9 µg/m³2026-05-17: 24.2 µg/m³2026-05-18: 19.7 µg/m³2026-05-19: 18.7 µg/m³2026-05-20: 21.4 µg/m³2026-05-21: 21.1 µg/m³2026-05-22: 17.9 µg/m³2026-05-23: 23.8 µg/m³2026-05-24: 21.8 µg/m³2026-05-25: 22.4 µg/m³2026-05-26: 23.3 µg/m³2026-05-27: 20.5 µg/m³2026-05-28: 17.3 µg/m³2026-05-29: 19.5 µg/m³2026-05-30: 19.5 µg/m³2026-05-31: 19.0 µg/m³2026-06-01: 15.6 µg/m³2026-06-02: 16.9 µg/m³2026-06-03: 16.8 µg/m³2026-06-04: 19.3 µg/m³2026-06-05: 17.2 µg/m³2026-06-06: 17.8 µg/m³2026-06-07: 17.9 µg/m³2026-06-08: 24.0 µg/m³2026-06-09: 24.4 µg/m³2026-06-10: 19.4 µg/m³2026-06-11: 16.5 µg/m³2026-06-12: 19.8 µg/m³2026-06-13: 20.3 µg/m³2026-06-14: 20.4 µg/m³2026-06-15: 23.7 µg/m³2026-06-16: 23.3 µg/m³2026-06-17: 19.8 µg/m³2026-06-18: 14.8 µg/m³2026-06-19: 14.1 µg/m³2026-06-20: 17.0 µg/m³2026-06-21: 19.6 µg/m³2026-06-22: 19.7 µg/m³2026-06-23: 24.4 µg/m³2026-06-24: 23.4 µg/m³2026-06-25: 25.3 µg/m³2026-06-26: 27.8 µg/m³2026-06-27: 24.9 µg/m³2026-06-28: 24.3 µg/m³2026-06-29: 21.2 µg/m³2026-06-30: 20.2 µg/m³2026-07-01: 19.2 µg/m³2026-07-02: 16.8 µg/m³2026-07-03: 16.6 µg/m³2026-07-04: 16.2 µg/m³2026-07-05: 13.5 µg/m³2026-07-06: 16.1 µg/m³2026-07-07: 16.8 µg/m³2026-07-08: 22.1 µg/m³2026-07-09: 20.6 µg/m³2026-07-10: 24.1 µg/m³2026-07-11: 23.4 µg/m³2026-07-12: 19.5 µg/m³2026-07-13: 17.0 µg/m³2026-07-14: 14.8 µg/m³2026-07-15: 17.5 µg/m³2026-07-16: 17.6 µg/m³2026-07-17: 17.5 µg/m³2026-07-18: 16.1 µg/m³2026-07-19: 13.3 µg/m³2026-07-20: 13.0 µg/m³2026-07-21: 12.1 µg/m³2026-07-22: no daily value, readings left out by our checks (a stuck monitor, error codes, or a reading its neighbours contradict)2026-07-23: 14.4 µg/m³2026-07-24: 16.3 µg/m³2026-07-25: 17.5 µg/m³2026-07-26: 16.5 µg/m³2026-07-27: 16.7 µg/m³2026-07-28: 14.3 µg/m³2026-07-29: 16.3 µg/m³2026-07-30: 15.1 µg/m³2026-07-31: 12.3 µg/m³2026-08-01: 13.2 µg/m³2026-08-02: 13.6 µg/m³2026-08-03: 15.5 µg/m³2026-08-04: 18.1 µg/m³2026-08-05: 17.0 µg/m³2026-08-06: 15.5 µg/m³2026-08-07: 17.7 µg/m³2026-08-08: 17.0 µg/m³2026-08-09: 18.5 µg/m³2026-08-10: 19.5 µg/m³2026-08-11: 18.3 µg/m³2026-08-12: 19.0 µg/m³2026-08-13: 19.0 µg/m³2026-08-14: 15.2 µg/m³2026-08-15: 13.0 µg/m³2026-08-16: 14.4 µg/m³2026-08-17: 13.7 µg/m³2026-08-18: 12.3 µg/m³2026-08-19: 14.8 µg/m³2026-08-20: 19.2 µg/m³2026-08-21: 24.9 µg/m³2026-08-22: 19.7 µg/m³2026-08-23: 18.3 µg/m³2026-08-24: 15.3 µg/m³2026-08-25: 16.8 µg/m³2026-08-26: 15.4 µg/m³2026-08-27: 16.4 µg/m³2026-08-28: 14.3 µg/m³2026-08-29: 16.3 µg/m³2026-08-30: 18.0 µg/m³2026-08-31: 17.6 µg/m³2026-09-01: 17.8 µg/m³2026-09-02: 18.9 µg/m³2026-09-03: 20.6 µg/m³2026-09-04: 21.1 µg/m³2026-09-05: 22.7 µg/m³2026-09-06: 19.1 µg/m³2026-09-07: 18.2 µg/m³2026-09-08: 15.5 µg/m³2026-09-09: 16.7 µg/m³2026-09-10: 17.5 µg/m³2026-09-11: 14.8 µg/m³2026-09-12: 18.6 µg/m³2026-09-13: 21.3 µg/m³2026-09-14: 19.5 µg/m³2026-09-15: 19.7 µg/m³2026-09-16: 19.8 µg/m³2026-09-17: 18.2 µg/m³2026-09-18: 18.7 µg/m³2026-09-19: 17.3 µg/m³2026-09-20: 13.5 µg/m³2026-09-21: 14.8 µg/m³2026-09-22: 19.5 µg/m³2026-09-23: 18.2 µg/m³2026-09-24: 18.5 µg/m³2026-09-25: 14.8 µg/m³2026-09-26: 13.5 µg/m³2026-09-27: 16.5 µg/m³2026-09-28: 15.3 µg/m³2026-09-29: 15.7 µg/m³2026-09-30: 17.5 µg/m³2026-10-01: 19.8 µg/m³2026-10-02: 20.4 µg/m³2026-10-03: 15.6 µg/m³2026-10-04: 16.8 µg/m³
286 of 356 measured days were over the WHO 24-hour guideline (15 µg/m³). 9 days without a value: 4 with no readings from the monitors, 2 with readings for part of the day (a day needs 18 hours), 3 with readings left out by our checks; point at a grey square for its reason (why days go blank). 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

15304 Oct 18:00 local, 2026-10-04 21:00 UTC: 18.0 µg/m³4 Oct 19:00 local, 2026-10-04 22:00 UTC: 18.0 µg/m³4 Oct 21:00 local, 2026-10-05 00:00 UTC: 18.5 µg/m³Oct 2Oct 3Oct 4
Huasco's local time; hover a bar for UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Where it stood each day

Top 10Top 100#1#10#100#1,000#3,193NovDecJanFebMarAprMayJunJulAugSep#245
Its rank on each day's world board, #1 being the most polluted city that day. Higher is worse. Each gridline down is ten times the rank above it (#1, #10, #100, #1,000), so the top places get the most room. See it among every city.

2026 against 2025, month by month

15Jan 2025: 16.9 µg/m³Jan 2026: 16.6 µg/m³JanFeb 2025: 18.9 µg/m³Feb 2026: 17.5 µg/m³FebMar 2025: 18.8 µg/m³Mar 2026: 16.2 µg/m³MarApr 2025: 18.8 µg/m³Apr 2026: 17.9 µg/m³AprMay 2025: 19.4 µg/m³May 2026: 19.4 µg/m³MayJun 2025: 19.6 µg/m³Jun 2026: 20.3 µg/m³JunJul 2025: 19.3 µg/m³Jul 2026: 16.8 µg/m³JulAug 2025: 18.0 µg/m³Aug 2026: 16.7 µg/m³AugSep 2025: 17.8 µg/m³Sep 2026: 17.8 µg/m³SepOct 2025: 18.6 µg/m³OctNov 2025: 16.6 µg/m³NovDec 2025: 15.8 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 17.3 µg/m³17.320252025: 18.8 µg/m³18.820242024: 17.9 µg/m³17.920232023: 17.8 µg/m³17.8
Mean PM2.5 for 28 Sept to 4 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

PM2.5 from 4 reference monitors, updated hourly. Only 2 of them reported in the last 24 hours.

StationOperatorType
Huasco SivicaPermission requested (Chile MMA, SINCA, 2026-10-01)Chile - SINCAReference
21 de MayoPermission requested (Chile MMA, SINCA, 2026-10-01)Chile - SINCAReference
EME FPermission requested (Chile MMA, SINCA, 2026-10-01)Chile - SINCAReference
EME MPermission 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, Huasco, Chile, 5 Oct 2025 – 4 Oct 2026, smogrank.com/cl/huasco (accessed 5 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Other cities in Chile

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

Updated 2026-10-05 03:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.