What is the air quality trend in Essex?

Over the past 8 days, Essex had an average AQI of 77 based on station measurements. The worst day was 2026-07-17 with AQI 167.

How is Essex air quality measured?

Air quality in Essex 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 Essex, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

158h

PM2.5 Station

158h · 23 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	24	23–26	5.8 µg/m³	2h	23
2026-07-21	53	28–76	14.7 µg/m³	23h	23
2026-07-20	70	59–83	21.3 µg/m³	22h	23
2026-07-19	62	35–91	18.3 µg/m³	23h	23
2026-07-18	134	60–158	53.0 µg/m³	23h	23
2026-07-17	167	60–227	100.7 µg/m³	24h	23
2026-07-16	59	57–60	15.7 µg/m³	22h	23
2026-07-15	52	46–58	13.0 µg/m³	19h	23

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