What is the air quality trend in Guilford?

Over the past 8 days, Guilford had an average AQI of 61 based on station measurements. The worst day was 2026-07-17 with AQI 117.

How is Guilford air quality measured?

Air quality in Guilford 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 Guilford, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

135h

PM2.5 Station

135h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	42	33–51	10.2 µg/m³	2h	2
2026-07-21	48	23–66	12.7 µg/m³	16h	1
2026-07-20	51	20–137	15.0 µg/m³	16h	2
2026-07-19	58	17–133	17.5 µg/m³	18h	2
2026-07-18	72	24–180	29.7 µg/m³	16h	2
2026-07-17	117	17–407	66.1 µg/m³	23h	2
2026-07-16	58	5–198	19.8 µg/m³	23h	2
2026-07-15	44	13–78	11.3 µg/m³	21h	1

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