What is the air quality trend in Centennial?

Over the past 14 days, Centennial had an average AQI of 20 based on station measurements. The worst day was 2026-05-21 with AQI 28.

How is Centennial air quality measured?

Air quality in Centennial 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 Centennial, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

334h

PM2.5 Station

334h · 3 stations

Temperature GFS model

55pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-28	20	15–26	4.7 µg/m³	15.2	23h	34
2026-05-27	19	17–25	4.4 µg/m³	17.3	24h	36
2026-05-26	20	18–23	4.9 µg/m³	29.9	24h	37
2026-05-25	20	18–23	4.9 µg/m³	22.5	24h	36
2026-05-24	20	16–24	4.8 µg/m³	27.5	24h	36
2026-05-23	17	15–25	4.1 µg/m³	10.8	24h	36
2026-05-22	19	14–25	4.6 µg/m³	10.0	24h	35
2026-05-21	28	21–35	6.8 µg/m³	19.3	24h	36
2026-05-20	27	15–40	6.4 µg/m³	12.1	24h	36
2026-05-19	15	11–24	3.7 µg/m³	5.3	24h	36
2026-05-18	17	12–23	4.0 µg/m³	5.6	24h	36
2026-05-17	22	18–27	5.4 µg/m³	15.1	24h	36
2026-05-16	22	19–26	5.3 µg/m³	34.6	24h	36
2026-05-15	21	18–26	5.0 µg/m³	47.0	23h	37

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