SmogRank / United States / Washington

Air quality in North Creek

Washington, United States. PM2.5 from 3 low-cost sensors, updated hourly.

1.6µg/m³
Good

Latest hour (18:00 UTC), 0.1× the WHO 24-hour guideline. 24-hour average 5.3 µg/m³.

Rank among 982 cities

24 hours#714of 982, at 5.3 µg/m³
7 days#2,304of 2,314, at 1.0 µg/m³
30 days#2,286of 2,323, at 2.7 µg/m³
This year–not enough data

The last 12 months, day by day

1102031Oct 2025NovDecJan 2026FebMarAprMayJunJulAugSep2025-10-01: 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 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data2026-03-04: no data2026-03-05: no data2026-03-06: no data2026-03-07: no data2026-03-08: no data2026-03-09: no data2026-03-10: no data2026-03-11: no data2026-03-12: no data2026-03-13: no data2026-03-14: no data2026-03-15: no data2026-03-16: no data2026-03-17: no data2026-03-18: no data2026-03-19: no data2026-03-20: no data2026-03-21: no data2026-03-22: no data2026-03-23: no data2026-03-24: no data2026-03-25: no data2026-03-26: no data2026-03-27: no data2026-03-28: no data2026-03-29: no data2026-03-30: no data2026-03-31: no data2026-04-01: no data2026-04-02: no data2026-04-03: no data2026-04-04: no data2026-04-05: no data2026-04-06: no data2026-04-07: no data2026-04-08: no data2026-04-09: no data2026-04-10: no data2026-04-11: no data2026-04-12: no data2026-04-13: no data2026-04-14: no data2026-04-15: no data2026-04-16: no data2026-04-17: no data2026-04-18: no data2026-04-19: no data2026-04-20: no data2026-04-21: no data2026-04-22: no data2026-04-23: no data2026-04-24: no data2026-04-25: no data2026-04-26: no data2026-04-27: no data2026-04-28: no data2026-04-29: no data2026-04-30: no data2026-05-01: no data2026-05-02: no data2026-05-03: no data2026-05-04: no data2026-05-05: no data2026-05-06: no data2026-05-07: no data2026-05-08: no data2026-05-09: no data2026-05-10: no data2026-05-11: no data2026-05-12: no data2026-05-13: no data2026-05-14: no data2026-05-15: no data2026-05-16: no data2026-05-17: no data2026-05-18: no data2026-05-19: no data2026-05-20: no data2026-05-21: no data2026-05-22: no data2026-05-23: no data2026-05-24: no data2026-05-25: no data2026-05-26: no data2026-05-27: no data2026-05-28: no data2026-05-29: no data2026-05-30: no data2026-05-31: no data2026-06-01: no data2026-06-02: no data2026-06-03: no data2026-06-04: no data2026-06-05: no data2026-06-06: no data2026-06-07: no data2026-06-08: no data2026-06-09: no data2026-06-10: no data2026-06-11: no data2026-06-12: no data2026-06-13: no data2026-06-14: no data2026-06-15: no data2026-06-16: no data2026-06-17: no data2026-06-18: no data2026-06-19: no data2026-06-20: no data2026-06-21: no data2026-06-22: no data2026-06-23: no data2026-06-24: no data2026-06-25: no data2026-06-26: no data2026-06-27: no data2026-06-28: no data2026-06-29: no data2026-06-30: no data2026-07-01: no data2026-07-02: no data2026-07-03: no data2026-07-04: no data2026-07-05: 9.2 µg/m³2026-07-06: 6.4 µg/m³2026-07-07: 2.5 µg/m³2026-07-08: 0.6 µg/m³2026-07-09: 0.3 µg/m³2026-07-10: 0.0 µg/m³2026-07-11: 0.0 µg/m³2026-07-12: 0.0 µg/m³2026-07-13: 0.0 µg/m³2026-07-14: no data2026-07-15: no data2026-07-16: 4.8 µg/m³2026-07-17: 1.1 µg/m³2026-07-18: 1.4 µg/m³2026-07-19: 2.2 µg/m³2026-07-20: 3.9 µg/m³2026-07-21: 22.6 µg/m³2026-07-22: 33.2 µg/m³2026-07-23: 4.5 µg/m³2026-07-24: 0.9 µg/m³2026-07-25: no data2026-07-26: no data2026-07-27: 0.3 µg/m³2026-07-28: no data2026-07-29: 0.1 µg/m³2026-07-30: 0.4 µg/m³2026-07-31: 1.2 µg/m³2026-08-01: 0.5 µg/m³2026-08-02: 0.9 µg/m³2026-08-03: 6.1 µg/m³2026-08-04: 39.6 µg/m³2026-08-05: 68.4 µg/m³2026-08-06: 53.8 µg/m³2026-08-07: 34.8 µg/m³2026-08-08: 3.3 µg/m³2026-08-09: 1.3 µg/m³2026-08-10: 2.4 µg/m³2026-08-11: 0.1 µg/m³2026-08-12: 4.4 µg/m³2026-08-13: 15.1 µg/m³2026-08-14: 14.8 µg/m³2026-08-15: 2.9 µg/m³2026-08-16: 0.7 µg/m³2026-08-17: 13.6 µg/m³2026-08-18: 20.4 µg/m³2026-08-19: 6.9 µg/m³2026-08-20: 3.7 µg/m³2026-08-21: 6.0 µg/m³2026-08-22: 2.9 µg/m³2026-08-23: 0.1 µg/m³2026-08-24: 7.2 µg/m³2026-08-25: 11.0 µg/m³2026-08-26: 1.2 µg/m³2026-08-27: 0.5 µg/m³2026-08-28: 0.1 µg/m³2026-08-29: 0.7 µg/m³2026-08-30: 0.8 µg/m³2026-08-31: 7.6 µg/m³2026-09-01: 3.0 µg/m³2026-09-02: 0.3 µg/m³2026-09-03: 0.5 µg/m³2026-09-04: 0.3 µg/m³2026-09-05: 1.9 µg/m³2026-09-06: 4.2 µg/m³2026-09-07: 1.4 µg/m³2026-09-08: 2.5 µg/m³2026-09-09: 2.7 µg/m³2026-09-10: 4.5 µg/m³2026-09-11: 2.6 µg/m³2026-09-12: 6.4 µg/m³2026-09-13: 1.7 µg/m³2026-09-14: 1.6 µg/m³2026-09-15: 3.8 µg/m³2026-09-16: 4.3 µg/m³2026-09-17: 5.6 µg/m³2026-09-18: 8.2 µg/m³2026-09-19: 9.2 µg/m³2026-09-20: 5.0 µg/m³2026-09-21: 1.5 µg/m³2026-09-22: 1.1 µg/m³2026-09-23: 0.6 µg/m³2026-09-24: 2.6 µg/m³2026-09-25: 1.8 µg/m³2026-09-26: 0.1 µg/m³2026-09-27: 1.1 µg/m³2026-09-28: 1.0 µg/m³2026-09-29: 0.1 µg/m³2026-09-30: 0.6 µg/m³
8 of 83 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Last 4 days, hour by hour

15302026-10-01 00:00 UTC: 0.1 µg/m³2026-10-01 01:00 UTC: 0.3 µg/m³2026-10-01 02:00 UTC: 2.3 µg/m³2026-10-01 03:00 UTC: 1.2 µg/m³2026-10-01 04:00 UTC: 4.8 µg/m³2026-10-01 05:00 UTC: 16.3 µg/m³2026-10-01 06:00 UTC: 9.3 µg/m³2026-10-01 07:00 UTC: 8.2 µg/m³2026-10-01 08:00 UTC: 8.8 µg/m³2026-10-01 09:00 UTC: 8.3 µg/m³2026-10-01 10:00 UTC: 5.4 µg/m³2026-10-01 12:00 UTC: 3.9 µg/m³2026-10-01 13:00 UTC: 4.1 µg/m³2026-10-01 14:00 UTC: 4.6 µg/m³2026-10-01 15:00 UTC: 5.5 µg/m³2026-10-01 16:00 UTC: 6.4 µg/m³2026-10-01 17:00 UTC: 3.6 µg/m³2026-10-01 18:00 UTC: 1.6 µg/m³Sep 28Sep 29Sep 30Oct 1
Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Its world rank, day by day

#1#2414AugSep
Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15JanFebMarAprMayJunJul 2026: 4.3 µg/m³JulAug 2026: 10.7 µg/m³AugSep 2026: 2.7 µg/m³SepOctNovDec
Faded bars: 2025. A month shows once it has 10 measured days.

Monitors

StationOperatorType
Clearview CC BY 4.0AirGradientLow-cost
ClearviewCC BY 4.0AirGradientLow-cost
Clearwater ReachCC BY 4.0AirGradientLow-cost

No reference monitor here, so the value is the median of low-cost sensors (at least two reporting each hour). Low-cost sensors can read high in humid air. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in United States

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

Updated 2026-10-01 19:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.