What is the air quality trend in Pullman?

Over the past 20 days, Pullman had an average AQI of 21 based on station measurements. The worst day was 2026-05-11 with AQI 28.

How is Pullman air quality measured?

Air quality in Pullman is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Pullman, United States

Name: Pullman Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Pullman, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

455h

PM2.5 Station

455h · 3 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	24	12–60	5.8 µg/m³	22h	2
2026-05-28	22	8–36	5.3 µg/m³	24h	3
2026-05-27	19	7–42	4.6 µg/m³	24h	3
2026-05-26	17	3–38	4.0 µg/m³	23h	3
2026-05-25	24	8–59	5.7 µg/m³	24h	3
2026-05-24	20	9–35	4.8 µg/m³	23h	3
2026-05-23	19	8–44	4.6 µg/m³	23h	3
2026-05-22	22	3–64	5.4 µg/m³	24h	3
2026-05-21	19	11–48	4.6 µg/m³	21h	3
2026-05-20	17	7–43	4.1 µg/m³	22h	3
2026-05-19	27	5–67	6.8 µg/m³	23h	3
2026-05-18	15	6–32	3.5 µg/m³	23h	3
2026-05-17	19	3–74	4.7 µg/m³	22h	2
2026-05-16	22	8–47	5.2 µg/m³	22h	3
2026-05-15	20	6–48	4.8 µg/m³	21h	3
2026-05-14	25	3–52	6.1 µg/m³	22h	4
2026-05-13	24	12–41	5.8 µg/m³	24h	3
2026-05-12	22	12–32	5.2 µg/m³	24h	3
2026-05-11	28	3–49	6.7 µg/m³	21h	3
2026-05-10	24	8–63	6.0 µg/m³	23h	3

Back to Pullman Air Quality