What is the air quality trend in Essex?

Over the past 7 days, Essex had an average AQI of 83 based on station measurements. The worst day was 2026-07-17 with AQI 165.

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 Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	53	32–75	14.7 µg/m³	23h	23
2026-07-20	67	32–80	19.8 µg/m³	24h	23
2026-07-19	62	35–91	17.9 µg/m³	24h	23
2026-07-18	131	59–157	50.3 µg/m³	23h	25
2026-07-17	165	59–226	97.8 µg/m³	24h	24
2026-07-16	58	42–75	15.6 µg/m³	23h	24
2026-07-15	49	18–58	12.1 µg/m³	24h	24

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