SmogRank / United States / Texas

Air quality in Pasadena

Texas, United States. PM2.5 from 1 reference monitor, updated hourly.

6.2 µg/m³
Good

Mean for 29 Sept, the most recent day with readings, 0.4× the WHO 24-hour guideline. No hourly readings have reached us since; some networks publish days late.

Rank

24 h
–
not enough data
7 days
#444
of 2,333 · 10.8 µg/m³
30 days
#482
of 2,331 · 9.0 µg/m³
Year
#660
of 2,173 · 10.0 µg/m³

Why it ranks here

Likely fire smoke. On Sep 24, when Pasadena averaged 16.0 µg/m³ (its typical day: 9.1), NASA satellites detected 102 fires within 300 km (23 within 100 km). Smoke from those fires is a likely contributor; we don't check which way the wind blew, and mapped smoke can be high above the ground.

Based on Pasadena's own measurements, with fire detections from NASA FIRMS and smoke maps from NOAA HMS; causes are the usual kinds for a pattern like this, not a confirmed source.

Hour by hour

No hourly readings in the last few days. The chart returns when the monitors' data arrives.

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 11.4 µg/m³2025-09-30: 15.6 µg/m³2025-10-01: 16.7 µg/m³2025-10-02: 16.7 µg/m³2025-10-03: 13.9 µg/m³2025-10-04: 12.0 µg/m³2025-10-05: 8.0 µg/m³2025-10-06: 8.2 µg/m³2025-10-07: 8.6 µg/m³2025-10-08: 11.7 µg/m³2025-10-09: 10.3 µg/m³2025-10-10: 9.3 µg/m³2025-10-11: 11.8 µg/m³2025-10-12: 11.7 µg/m³2025-10-13: no data2025-10-14: no data2025-10-15: no data2025-10-16: no data2025-10-17: no data2025-10-18: 5.6 µg/m³2025-10-19: 6.3 µg/m³2025-10-20: 8.0 µg/m³2025-10-21: 8.8 µg/m³2025-10-22: 7.6 µg/m³2025-10-23: 10.3 µg/m³2025-10-24: 8.8 µg/m³2025-10-25: 5.2 µg/m³2025-10-26: 7.4 µg/m³2025-10-27: 9.6 µg/m³2025-10-28: 7.3 µg/m³2025-10-29: 3.5 µg/m³2025-10-30: 6.4 µg/m³2025-10-31: 14.5 µg/m³2025-11-01: 11.5 µg/m³2025-11-02: 12.3 µg/m³2025-11-03: 10.1 µg/m³2025-11-04: 11.3 µg/m³2025-11-05: 6.7 µg/m³2025-11-06: 7.5 µg/m³2025-11-07: 6.1 µg/m³2025-11-08: 9.0 µg/m³2025-11-09: 5.3 µg/m³2025-11-10: 5.0 µg/m³2025-11-11: 8.0 µg/m³2025-11-12: 4.4 µg/m³2025-11-13: no data2025-11-14: no data2025-11-15: no data2025-11-16: no data2025-11-17: no data2025-11-18: no data2025-11-19: no data2025-11-20: no data2025-11-21: 6.1 µg/m³2025-11-22: 10.0 µg/m³2025-11-23: 8.0 µg/m³2025-11-24: 7.2 µg/m³2025-11-25: 8.0 µg/m³2025-11-26: 6.5 µg/m³2025-11-27: no data2025-11-28: no data2025-11-29: no data2025-11-30: no data2025-12-01: no data2025-12-02: 6.7 µg/m³2025-12-03: 11.2 µg/m³2025-12-04: 3.9 µg/m³2025-12-05: 10.3 µg/m³2025-12-06: 14.6 µg/m³2025-12-07: 15.1 µg/m³2025-12-08: 10.9 µg/m³2025-12-09: 10.9 µg/m³2025-12-10: 8.7 µg/m³2025-12-11: 11.1 µg/m³2025-12-12: 12.5 µg/m³2025-12-13: 7.5 µg/m³2025-12-14: 8.9 µg/m³2025-12-15: 9.7 µg/m³2025-12-16: 15.9 µg/m³2025-12-17: 10.4 µg/m³2025-12-18: 7.2 µg/m³2025-12-19: 6.8 µg/m³2025-12-20: 9.2 µg/m³2025-12-21: 8.5 µg/m³2025-12-22: 5.8 µg/m³2025-12-23: 9.9 µg/m³2025-12-24: 10.3 µg/m³2025-12-25: 7.6 µg/m³2025-12-26: 4.0 µg/m³2025-12-27: 4.7 µg/m³2025-12-28: 6.4 µg/m³2025-12-29: 2.2 µg/m³2025-12-30: 9.3 µg/m³2025-12-31: 22.1 µg/m³2026-01-01: 39.2 µg/m³2026-01-02: 4.9 µg/m³2026-01-03: 10.8 µg/m³2026-01-04: 7.8 µg/m³2026-01-05: 7.1 µg/m³2026-01-06: 15.5 µg/m³2026-01-07: 13.6 µg/m³2026-01-08: 8.3 µg/m³2026-01-09: 8.8 µg/m³2026-01-10: 4.6 µg/m³2026-01-11: 6.1 µg/m³2026-01-12: 10.5 µg/m³2026-01-13: 12.7 µg/m³2026-01-14: 4.7 µg/m³2026-01-15: 6.7 µg/m³2026-01-16: 7.6 µg/m³2026-01-17: 3.8 µg/m³2026-01-18: 8.3 µg/m³2026-01-19: 7.5 µg/m³2026-01-20: 10.9 µg/m³2026-01-21: 9.4 µg/m³2026-01-22: 10.3 µg/m³2026-01-23: 14.5 µg/m³2026-01-24: 6.7 µg/m³2026-01-25: 6.5 µg/m³2026-01-26: 8.1 µg/m³2026-01-27: 12.7 µg/m³2026-01-28: 17.5 µg/m³2026-01-29: 15.4 µg/m³2026-01-30: 18.6 µg/m³2026-01-31: 8.8 µg/m³2026-02-01: 10.3 µg/m³2026-02-02: 6.7 µg/m³2026-02-03: 6.3 µg/m³2026-02-04: 7.9 µg/m³2026-02-05: 9.8 µg/m³2026-02-06: 6.7 µg/m³2026-02-07: 13.4 µg/m³2026-02-08: 7.8 µg/m³2026-02-09: 5.6 µg/m³2026-02-10: 6.5 µg/m³2026-02-11: 10.9 µg/m³2026-02-12: 16.1 µg/m³2026-02-13: 9.1 µg/m³2026-02-14: 8.2 µg/m³2026-02-15: 4.8 µg/m³2026-02-16: 8.8 µg/m³2026-02-17: 5.9 µg/m³2026-02-18: 8.2 µg/m³2026-02-19: 20.3 µg/m³2026-02-20: 19.5 µg/m³2026-02-21: 19.9 µg/m³2026-02-22: 14.4 µg/m³2026-02-23: 10.0 µg/m³2026-02-24: 10.8 µg/m³2026-02-25: 7.9 µg/m³2026-02-26: 14.2 µg/m³2026-02-27: 15.4 µg/m³2026-02-28: 19.3 µg/m³2026-03-01: 11.4 µg/m³2026-03-02: 8.9 µg/m³2026-03-03: 7.4 µg/m³2026-03-04: 9.2 µg/m³2026-03-05: 7.2 µg/m³2026-03-06: 9.5 µg/m³2026-03-07: 10.2 µg/m³2026-03-08: 5.6 µg/m³2026-03-09: 10.5 µg/m³2026-03-10: 10.4 µg/m³2026-03-11: 8.2 µg/m³2026-03-12: 5.0 µg/m³2026-03-13: 9.1 µg/m³2026-03-14: 5.1 µg/m³2026-03-15: 8.6 µg/m³2026-03-16: 3.5 µg/m³2026-03-17: 6.1 µg/m³2026-03-18: 3.6 µg/m³2026-03-19: 6.9 µg/m³2026-03-20: 6.2 µg/m³2026-03-21: 5.7 µg/m³2026-03-22: 6.3 µg/m³2026-03-23: 6.2 µg/m³2026-03-24: 8.8 µg/m³2026-03-25: 6.0 µg/m³2026-03-26: 4.9 µg/m³2026-03-27: 6.1 µg/m³2026-03-28: 8.2 µg/m³2026-03-29: 10.8 µg/m³2026-03-30: 8.8 µg/m³2026-03-31: 10.3 µg/m³2026-04-01: 9.7 µg/m³2026-04-02: 9.8 µg/m³2026-04-03: 9.3 µg/m³2026-04-04: 8.8 µg/m³2026-04-05: 5.3 µg/m³2026-04-06: 4.8 µg/m³2026-04-07: 7.6 µg/m³2026-04-08: 7.9 µg/m³2026-04-09: 9.9 µg/m³2026-04-10: 10.8 µg/m³2026-04-11: 9.2 µg/m³2026-04-12: 7.0 µg/m³2026-04-13: 8.3 µg/m³2026-04-14: 7.7 µg/m³2026-04-15: 8.2 µg/m³2026-04-16: 9.5 µg/m³2026-04-17: 10.2 µg/m³2026-04-18: 8.9 µg/m³2026-04-19: 4.9 µg/m³2026-04-20: 7.0 µg/m³2026-04-21: 7.9 µg/m³2026-04-22: 13.0 µg/m³2026-04-23: 6.8 µg/m³2026-04-24: 10.3 µg/m³2026-04-25: 15.2 µg/m³2026-04-26: 10.9 µg/m³2026-04-27: 15.0 µg/m³2026-04-28: 13.5 µg/m³2026-04-29: 12.0 µg/m³2026-04-30: 9.7 µg/m³2026-05-01: 1.7 µg/m³2026-05-02: 6.9 µg/m³2026-05-03: 10.1 µg/m³2026-05-04: 7.2 µg/m³2026-05-05: 8.4 µg/m³2026-05-06: 18.5 µg/m³2026-05-07: 10.2 µg/m³2026-05-08: 13.3 µg/m³2026-05-09: 10.6 µg/m³2026-05-10: 10.4 µg/m³2026-05-11: 5.8 µg/m³2026-05-12: 9.0 µg/m³2026-05-13: 13.5 µg/m³2026-05-14: 10.9 µg/m³2026-05-15: 7.0 µg/m³2026-05-16: 7.9 µg/m³2026-05-17: 12.0 µg/m³2026-05-18: 12.6 µg/m³2026-05-19: 10.3 µg/m³2026-05-20: 7.4 µg/m³2026-05-21: 10.5 µg/m³2026-05-22: 7.2 µg/m³2026-05-23: 5.3 µg/m³2026-05-24: 6.5 µg/m³2026-05-25: 8.3 µg/m³2026-05-26: 7.7 µg/m³2026-05-27: 5.9 µg/m³2026-05-28: 11.0 µg/m³2026-05-29: 10.0 µg/m³2026-05-30: 8.2 µg/m³2026-05-31: 8.0 µg/m³2026-06-01: 10.9 µg/m³2026-06-02: 9.7 µg/m³2026-06-03: 7.8 µg/m³2026-06-04: 7.3 µg/m³2026-06-05: 5.6 µg/m³2026-06-06: 7.9 µg/m³2026-06-07: 13.6 µg/m³2026-06-08: 11.3 µg/m³2026-06-09: 7.6 µg/m³2026-06-10: 6.0 µg/m³2026-06-11: 6.2 µg/m³2026-06-12: 7.5 µg/m³2026-06-13: 11.5 µg/m³2026-06-14: 10.3 µg/m³2026-06-15: 9.0 µg/m³2026-06-16: 6.4 µg/m³2026-06-17: 7.5 µg/m³2026-06-18: 20.1 µg/m³2026-06-19: 12.6 µg/m³2026-06-20: 7.5 µg/m³2026-06-21: 6.8 µg/m³2026-06-22: 11.3 µg/m³2026-06-23: 14.6 µg/m³2026-06-24: 18.3 µg/m³2026-06-25: 14.4 µg/m³2026-06-26: 10.4 µg/m³2026-06-27: 13.8 µg/m³2026-06-28: 14.2 µg/m³2026-06-29: 17.5 µg/m³2026-06-30: 10.4 µg/m³2026-07-01: 13.3 µg/m³2026-07-02: 9.7 µg/m³2026-07-03: 8.5 µg/m³2026-07-04: 9.0 µg/m³2026-07-05: 10.2 µg/m³2026-07-06: 6.2 µg/m³2026-07-07: 7.4 µg/m³2026-07-08: 9.0 µg/m³2026-07-09: 7.4 µg/m³2026-07-10: 10.0 µg/m³2026-07-11: 11.3 µg/m³2026-07-12: 11.3 µg/m³2026-07-13: 12.6 µg/m³2026-07-14: 9.8 µg/m³2026-07-15: 16.7 µg/m³2026-07-16: 20.3 µg/m³2026-07-17: 13.6 µg/m³2026-07-18: 15.8 µg/m³2026-07-19: 17.8 µg/m³2026-07-20: 19.3 µg/m³2026-07-21: 18.2 µg/m³2026-07-22: 19.1 µg/m³2026-07-23: 10.2 µg/m³2026-07-24: 16.3 µg/m³2026-07-25: 15.4 µg/m³2026-07-26: 7.0 µg/m³2026-07-27: 7.6 µg/m³2026-07-28: 12.4 µg/m³2026-07-29: 10.8 µg/m³2026-07-30: 9.3 µg/m³2026-07-31: 10.5 µg/m³2026-08-01: 6.6 µg/m³2026-08-02: 8.7 µg/m³2026-08-03: 12.8 µg/m³2026-08-04: 19.8 µg/m³2026-08-05: 17.8 µg/m³2026-08-06: 9.8 µg/m³2026-08-07: 9.0 µg/m³2026-08-08: 9.9 µg/m³2026-08-09: 4.0 µg/m³2026-08-10: 6.0 µg/m³2026-08-11: 7.9 µg/m³2026-08-12: 8.1 µg/m³2026-08-13: 14.9 µg/m³2026-08-14: 17.6 µg/m³2026-08-15: 15.4 µg/m³2026-08-16: 10.4 µg/m³2026-08-17: 10.2 µg/m³2026-08-18: 9.8 µg/m³2026-08-19: 9.3 µg/m³2026-08-20: 12.7 µg/m³2026-08-21: 16.3 µg/m³2026-08-22: 17.3 µg/m³2026-08-23: 14.7 µg/m³2026-08-24: 13.6 µg/m³2026-08-25: 10.8 µg/m³2026-08-26: 9.9 µg/m³2026-08-27: 8.1 µg/m³2026-08-28: 9.2 µg/m³2026-08-29: 12.5 µg/m³2026-08-30: 7.2 µg/m³2026-08-31: 9.2 µg/m³2026-09-01: 7.8 µg/m³2026-09-02: 8.9 µg/m³2026-09-03: 9.1 µg/m³2026-09-04: 8.8 µg/m³2026-09-05: 7.6 µg/m³2026-09-06: 7.6 µg/m³2026-09-07: 6.7 µg/m³2026-09-08: 7.6 µg/m³2026-09-09: 7.4 µg/m³2026-09-10: 9.0 µg/m³2026-09-11: 7.0 µg/m³2026-09-12: 6.9 µg/m³2026-09-13: 4.5 µg/m³2026-09-14: 6.3 µg/m³2026-09-15: 9.8 µg/m³2026-09-16: 8.9 µg/m³2026-09-17: 10.9 µg/m³2026-09-18: 9.9 µg/m³2026-09-19: 8.6 µg/m³2026-09-20: 8.3 µg/m³2026-09-21: 9.1 µg/m³2026-09-22: 11.5 µg/m³2026-09-23: 12.9 µg/m³2026-09-24: 16.0 µg/m³2026-09-25: 11.6 µg/m³2026-09-26: 13.8 µg/m³2026-09-27: 8.7 µg/m³2026-09-28: 8.2 µg/m³2026-09-29: 6.2 µg/m³2026-09-30: no data
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

37 of 346 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#2235OctNovDecJanFebMarAprMayJunJulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2025: 9.0 µg/m³Jan 2026: 10.6 µg/m³JanFeb 2025: 9.4 µg/m³Feb 2026: 10.9 µg/m³FebMar 2025: 11.4 µg/m³Mar 2026: 7.6 µg/m³MarApr 2025: 11.2 µg/m³Apr 2026: 9.3 µg/m³AprMay 2025: 10.6 µg/m³May 2026: 9.1 µg/m³MayJun 2025: 10.7 µg/m³Jun 2026: 10.6 µg/m³JunJul 2025: 12.8 µg/m³Jul 2026: 12.1 µg/m³JulAug 2025: 11.0 µg/m³Aug 2026: 11.3 µg/m³AugSep 2025: 11.4 µg/m³Sep 2026: 9.0 µg/m³SepOct 2025: 9.5 µg/m³OctNov 2025: 7.9 µg/m³NovDec 2025: 9.4 µg/m³Dec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 10.8 µg/m³10.820252025: 11.1 µg/m³11.120242024: 12.0 µg/m³12.020232023: 9.1 µg/m³9.1

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Houston East C1US Public DomainAirNowReference
Fire Station 44CC0 1.0ClarityLow-cost

The city's value is the median of its reference monitors each hour; 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.

Other cities in United States

Calexico 23.0Jurupa Valley 12.9Riverside 12.3Little Rock 12.2Hanford 11.9Oceanside 11.8Laredo 11.4Shreveport 11.0Wake Forest 11.0Corcoran 11.0Fontana 11.0West Memphis 10.9

30-day averages, µg/m³. All of United States →

Updated 2026-10-01 11:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.