What is the air quality trend in Centralia?

Over the past 18 days, Centralia had an average AQI of 13 based on station measurements. The worst day was with AQI .

How is Centralia air quality measured?

Air quality in Centralia 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 Centralia, United States

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

306h · 1 station

Daily Summary

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-04-12	29	15–44	6.9 µg/m³	13h	1
2026-04-11	18	7–28	4.3 µg/m³	19h	1
2026-04-10	16	9–30	3.9 µg/m³	18h	1
2026-04-09	15	9–27	3.6 µg/m³	13h	2
2026-04-08	18	10–27	4.3 µg/m³	10h	2
2026-04-07	11	8–17	2.8 µg/m³	24h	2
2026-04-06	12	8–17	2.8 µg/m³	16h	2
2026-04-04	19	4–63	4.8 µg/m³	16h	2
2026-04-03	7	4–15	1.7 µg/m³	7h	2
2026-04-02	5	2–11	1.3 µg/m³	21h	2
2026-04-01	9	2–52	2.2 µg/m³	22h	2
2026-03-31	10	5–24	2.5 µg/m³	21h	2
2026-03-30	9	4–18	2.3 µg/m³	10h	2
2026-03-29	11	6–29	2.7 µg/m³	21h	2
2026-03-28	28	6–64	6.9 µg/m³	22h	2
2026-03-27	10	3–23	2.3 µg/m³	24h	2
2026-03-26	8	2–18	1.8 µg/m³	24h	2
2026-03-25	5	2–8	1.2 µg/m³	5h	2

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