What is the air quality trend in Smithfield?

Over the past 21 days, Smithfield had an average AQI of 32 based on station measurements. The worst day was 2026-05-19 with AQI 50.

How is Smithfield air quality measured?

Air quality in Smithfield 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 Smithfield, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

479h

PM2.5 Station

479h · 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	25	16–40	6.1 µg/m³	21h	8
2026-05-28	28	20–46	6.7 µg/m³	24h	10
2026-05-27	31	21–39	7.5 µg/m³	24h	10
2026-05-26	30	20–46	7.3 µg/m³	24h	7
2026-05-25	26	17–34	6.3 µg/m³	24h	8
2026-05-24	33	15–177	10.5 µg/m³	24h	7
2026-05-23	26	18–42	6.3 µg/m³	24h	7
2026-05-22	26	18–35	6.4 µg/m³	24h	10
2026-05-21	25	14–39	6.1 µg/m³	24h	10
2026-05-20	46	32–61	11.4 µg/m³	24h	8
2026-05-19	50	39–64	12.2 µg/m³	24h	9
2026-05-18	44	29–60	10.6 µg/m³	24h	8
2026-05-17	41	24–53	9.9 µg/m³	24h	6
2026-05-16	29	19–42	7.0 µg/m³	24h	8
2026-05-15	28	12–52	6.8 µg/m³	24h	9
2026-05-14	43	23–154	12.6 µg/m³	24h	7
2026-05-13	29	21–37	7.0 µg/m³	24h	8
2026-05-12	25	18–41	6.0 µg/m³	24h	9
2026-05-11	26	17–55	6.3 µg/m³	24h	8
2026-05-10	29	18–56	6.9 µg/m³	24h	8
2026-05-09	33	30–36	7.9 µg/m³	2h	11

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