SmogRank / United States / Washington

Air quality in Kent

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

4.0 µg/m³
Good

Latest hour (04:00 UTC), 0.3× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#1,997
of 2,330 · 4.4 µg/m³
30 days
#1,443
of 2,327 · 5.7 µg/m³
Year
#2,071
of 2,160 · 4.8 µg/m³

Last 4 days, hour by hour

15302026-10-01 00:00 UTC: 3.0 µg/m³2026-10-01 01:00 UTC: 5.0 µg/m³2026-10-01 02:00 UTC: 4.0 µg/m³2026-10-01 03:00 UTC: 7.0 µg/m³2026-10-01 04:00 UTC: 4.0 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: no data2025-09-30: no data2025-10-01: no data2025-10-02: no data2025-10-03: no data2025-10-04: no data2025-10-05: no data2025-10-06: no data2025-10-07: no data2025-10-08: no data2025-10-09: no data2025-10-10: no data2025-10-11: no data2025-10-12: no data2025-10-13: no data2025-10-14: no data2025-10-15: no data2025-10-16: no data2025-10-17: no data2025-10-18: no data2025-10-19: no data2025-10-20: no data2025-10-21: no data2025-10-22: no data2025-10-23: no data2025-10-24: no data2025-10-25: no data2025-10-26: no data2025-10-27: no data2025-10-28: no data2025-10-29: no data2025-10-30: no data2025-10-31: no data2025-11-01: no data2025-11-02: no data2025-11-03: no data2025-11-04: no data2025-11-05: no data2025-11-06: no data2025-11-07: no data2025-11-08: no data2025-11-09: no data2025-11-10: no data2025-11-11: no data2025-11-12: no data2025-11-13: 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: no data2025-11-22: no data2025-11-23: no data2025-11-24: no data2025-11-25: no data2025-11-26: no data2025-11-27: no data2025-11-28: no data2025-11-29: no data2025-11-30: no data2025-12-01: no data2025-12-02: no data2025-12-03: no data2025-12-04: no data2025-12-05: no data2025-12-06: no data2025-12-07: no data2025-12-08: no data2025-12-09: no data2025-12-10: no data2025-12-11: no data2025-12-12: no data2025-12-13: no data2025-12-14: no data2025-12-15: no data2025-12-16: no data2025-12-17: no data2025-12-18: no data2025-12-19: no data2025-12-20: no data2025-12-21: no data2025-12-22: no data2025-12-23: no data2025-12-24: no data2025-12-25: no data2025-12-26: no data2025-12-27: no data2025-12-28: no data2025-12-29: no data2025-12-30: no data2025-12-31: no data2026-01-01: no data2026-01-02: no data2026-01-03: no data2026-01-04: no data2026-01-05: no data2026-01-06: no data2026-01-07: no data2026-01-08: no data2026-01-09: no data2026-01-10: no data2026-01-11: no data2026-01-12: no data2026-01-13: no data2026-01-14: no data2026-01-15: no data2026-01-16: no data2026-01-17: no data2026-01-18: no data2026-01-19: no data2026-01-20: no data2026-01-21: no data2026-01-22: no data2026-01-23: no data2026-01-24: no data2026-01-25: no data2026-01-26: no data2026-01-27: no data2026-01-28: no data2026-01-29: no data2026-01-30: 5.1 µg/m³2026-01-31: 7.5 µg/m³2026-02-01: 4.6 µg/m³2026-02-02: 2.3 µg/m³2026-02-03: 5.8 µg/m³2026-02-04: 6.6 µg/m³2026-02-05: 9.1 µg/m³2026-02-06: 10.5 µg/m³2026-02-07: 7.1 µg/m³2026-02-08: 4.7 µg/m³2026-02-09: 2.0 µg/m³2026-02-10: 3.6 µg/m³2026-02-11: 4.1 µg/m³2026-02-12: 5.9 µg/m³2026-02-13: 3.4 µg/m³2026-02-14: 0.9 µg/m³2026-02-15: 5.5 µg/m³2026-02-16: 6.4 µg/m³2026-02-17: 4.0 µg/m³2026-02-18: 4.9 µg/m³2026-02-19: 1.9 µg/m³2026-02-20: 5.0 µg/m³2026-02-21: 0.7 µg/m³2026-02-22: 3.6 µg/m³2026-02-23: 2.2 µg/m³2026-02-24: 3.5 µg/m³2026-02-25: 3.9 µg/m³2026-02-26: 0.7 µg/m³2026-02-27: 2.9 µg/m³2026-02-28: 3.2 µg/m³2026-03-01: 7.1 µg/m³2026-03-02: 9.0 µg/m³2026-03-03: 7.0 µg/m³2026-03-04: 1.7 µg/m³2026-03-05: no data2026-03-06: 0.9 µg/m³2026-03-07: 0.0 µg/m³2026-03-08: 1.3 µg/m³2026-03-09: 1.6 µg/m³2026-03-10: 1.5 µg/m³2026-03-11: 0.3 µg/m³2026-03-12: 1.1 µg/m³2026-03-13: 3.7 µg/m³2026-03-14: 5.7 µg/m³2026-03-15: 2.5 µg/m³2026-03-16: 2.9 µg/m³2026-03-17: 1.6 µg/m³2026-03-18: 0.7 µg/m³2026-03-19: 0.8 µg/m³2026-03-20: 1.4 µg/m³2026-03-21: 0.9 µg/m³2026-03-22: 1.1 µg/m³2026-03-23: 3.0 µg/m³2026-03-24: 3.8 µg/m³2026-03-25: 0.8 µg/m³2026-03-26: 2.1 µg/m³2026-03-27: 3.4 µg/m³2026-03-28: 3.1 µg/m³2026-03-29: 3.3 µg/m³2026-03-30: 1.9 µg/m³2026-03-31: 3.8 µg/m³2026-04-01: 1.3 µg/m³2026-04-02: 1.0 µg/m³2026-04-03: 1.4 µg/m³2026-04-04: 4.6 µg/m³2026-04-05: 2.1 µg/m³2026-04-06: 5.7 µg/m³2026-04-07: 2.3 µg/m³2026-04-08: 4.9 µg/m³2026-04-09: 4.4 µg/m³2026-04-10: 8.5 µg/m³2026-04-11: 3.9 µg/m³2026-04-12: 3.1 µg/m³2026-04-13: 0.2 µg/m³2026-04-14: 0.8 µg/m³2026-04-15: 0.0 µg/m³2026-04-16: 1.0 µg/m³2026-04-17: 2.3 µg/m³2026-04-18: 3.8 µg/m³2026-04-19: 5.2 µg/m³2026-04-20: 4.6 µg/m³2026-04-21: 1.8 µg/m³2026-04-22: 1.3 µg/m³2026-04-23: no data2026-04-24: no data2026-04-25: no data2026-04-26: no data2026-04-27: no data2026-04-28: no data2026-04-29: 5.1 µg/m³2026-04-30: 7.8 µg/m³2026-05-01: 7.6 µg/m³2026-05-02: 6.7 µg/m³2026-05-03: 9.4 µg/m³2026-05-04: 8.0 µg/m³2026-05-05: 4.8 µg/m³2026-05-06: 4.4 µg/m³2026-05-07: 5.9 µg/m³2026-05-08: 5.8 µg/m³2026-05-09: 4.8 µg/m³2026-05-10: 5.5 µg/m³2026-05-11: 2.5 µg/m³2026-05-12: 5.1 µg/m³2026-05-13: 2.3 µg/m³2026-05-14: 1.3 µg/m³2026-05-15: 1.8 µg/m³2026-05-16: 1.5 µg/m³2026-05-17: 3.1 µg/m³2026-05-18: 3.2 µg/m³2026-05-19: 1.8 µg/m³2026-05-20: 1.9 µg/m³2026-05-21: 4.5 µg/m³2026-05-22: no data2026-05-23: 2.9 µg/m³2026-05-24: 6.4 µg/m³2026-05-25: 3.3 µg/m³2026-05-26: 3.5 µg/m³2026-05-27: 6.1 µg/m³2026-05-28: 6.5 µg/m³2026-05-29: 5.0 µg/m³2026-05-30: 4.1 µg/m³2026-05-31: 4.5 µg/m³2026-06-01: 6.1 µg/m³2026-06-02: 6.1 µg/m³2026-06-03: 5.0 µg/m³2026-06-04: 2.8 µg/m³2026-06-05: 2.6 µg/m³2026-06-06: 2.7 µg/m³2026-06-07: 2.6 µg/m³2026-06-08: 4.5 µg/m³2026-06-09: 1.0 µg/m³2026-06-10: 2.1 µg/m³2026-06-11: 3.2 µg/m³2026-06-12: 3.3 µg/m³2026-06-13: 5.2 µg/m³2026-06-14: 8.5 µg/m³2026-06-15: 6.8 µg/m³2026-06-16: 3.4 µg/m³2026-06-17: 4.1 µg/m³2026-06-18: 5.4 µg/m³2026-06-19: 6.0 µg/m³2026-06-20: 8.3 µg/m³2026-06-21: 7.8 µg/m³2026-06-22: 7.1 µg/m³2026-06-23: 8.2 µg/m³2026-06-24: 9.6 µg/m³2026-06-25: 2.3 µg/m³2026-06-26: 1.5 µg/m³2026-06-27: 1.5 µg/m³2026-06-28: 3.0 µg/m³2026-06-29: 3.6 µg/m³2026-06-30: 3.0 µg/m³2026-07-01: 5.8 µg/m³2026-07-02: 2.1 µg/m³2026-07-03: 0.5 µg/m³2026-07-04: 2.5 µg/m³2026-07-05: 7.5 µg/m³2026-07-06: 8.8 µg/m³2026-07-07: 4.8 µg/m³2026-07-08: 3.0 µg/m³2026-07-09: 5.0 µg/m³2026-07-10: 3.7 µg/m³2026-07-11: 2.0 µg/m³2026-07-12: 0.8 µg/m³2026-07-13: 4.1 µg/m³2026-07-14: 6.9 µg/m³2026-07-15: 6.7 µg/m³2026-07-16: 6.6 µg/m³2026-07-17: 3.8 µg/m³2026-07-18: 4.0 µg/m³2026-07-19: 4.3 µg/m³2026-07-20: 7.6 µg/m³2026-07-21: 13.0 µg/m³2026-07-22: 18.0 µg/m³2026-07-23: 3.3 µg/m³2026-07-24: 3.0 µg/m³2026-07-25: 1.9 µg/m³2026-07-26: 1.1 µg/m³2026-07-27: 1.8 µg/m³2026-07-28: 2.2 µg/m³2026-07-29: 2.8 µg/m³2026-07-30: 4.5 µg/m³2026-07-31: 4.6 µg/m³2026-08-01: 1.3 µg/m³2026-08-02: 3.4 µg/m³2026-08-03: 8.5 µg/m³2026-08-04: 29.2 µg/m³2026-08-05: 41.1 µg/m³2026-08-06: 39.6 µg/m³2026-08-07: 20.6 µg/m³2026-08-08: 8.3 µg/m³2026-08-09: no data2026-08-10: no data2026-08-11: 4.0 µg/m³2026-08-12: no data2026-08-13: 8.4 µg/m³2026-08-14: 7.7 µg/m³2026-08-15: 3.3 µg/m³2026-08-16: 2.4 µg/m³2026-08-17: 8.0 µg/m³2026-08-18: 6.8 µg/m³2026-08-19: 4.5 µg/m³2026-08-20: 7.7 µg/m³2026-08-21: 8.7 µg/m³2026-08-22: 4.2 µg/m³2026-08-23: 1.5 µg/m³2026-08-24: 6.5 µg/m³2026-08-25: 9.4 µg/m³2026-08-26: 2.8 µg/m³2026-08-27: 0.9 µg/m³2026-08-28: 1.9 µg/m³2026-08-29: 3.0 µg/m³2026-08-30: 4.0 µg/m³2026-08-31: 8.4 µg/m³2026-09-01: 6.5 µg/m³2026-09-02: 2.8 µg/m³2026-09-03: 2.9 µg/m³2026-09-04: 3.4 µg/m³2026-09-05: 4.3 µg/m³2026-09-06: 6.1 µg/m³2026-09-07: 3.9 µg/m³2026-09-08: 5.1 µg/m³2026-09-09: 6.9 µg/m³2026-09-10: 6.6 µg/m³2026-09-11: 6.4 µg/m³2026-09-12: 6.7 µg/m³2026-09-13: 3.3 µg/m³2026-09-14: 5.5 µg/m³2026-09-15: 6.6 µg/m³2026-09-16: 6.8 µg/m³2026-09-17: 8.4 µg/m³2026-09-18: 7.8 µg/m³2026-09-19: 8.6 µg/m³2026-09-20: 8.8 µg/m³2026-09-21: 9.0 µg/m³2026-09-22: 4.0 µg/m³2026-09-23: 3.5 µg/m³2026-09-24: 5.2 µg/m³2026-09-25: 5.1 µg/m³2026-09-26: 3.4 µg/m³2026-09-27: 5.4 µg/m³2026-09-28: 7.2 µg/m³2026-09-29: 1.1 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

5 of 232 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#2330FebMarAprMayJunJulAugSep

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

2026 against 2025, month by month

15JanFeb 2026: 4.3 µg/m³FebMar 2026: 2.6 µg/m³MarApr 2026: 3.2 µg/m³AprMay 2026: 4.5 µg/m³MayJun 2026: 4.6 µg/m³JunJul 2026: 4.7 µg/m³JulAug 2026: 9.1 µg/m³AugSep 2026: 5.5 µg/m³SepOctNovDec

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

Monitors

StationOperatorType
Kent-S 236thUS Public DomainAirNowReference
Emerald DownsCC BY 4.0Racing Surfaces Testing LaboratoryLow-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 22.9Jurupa Valley 12.9Riverside 12.4Little Rock 12.2Hanford 12.0Oceanside 11.9Laredo 11.4Clovis 11.2Fontana 11.2Corcoran 11.1Shreveport 11.0Wake Forest 11.0

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

Updated 2026-10-01 05:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.