What is the air quality trend in Lancaster?

Over the past 8 days, Lancaster had an average AQI of 44 based on station measurements. The worst day was 2026-07-17 with AQI 62.

How is Lancaster air quality measured?

Air quality in Lancaster 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 Lancaster, United States

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

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

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

101h

PM2.5 Station

101h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	49	24–95	13.2 µg/m³	11h	1
2026-07-20	38	3–76	10.3 µg/m³	8h	1
2026-07-19	51	10–182	20.6 µg/m³	10h	1
2026-07-18	53	21–173	17.5 µg/m³	13h	1
2026-07-17	62	5–271	29.7 µg/m³	21h	1
2026-07-16	37	1–70	9.3 µg/m³	20h	1
2026-07-15	36	6–51	8.7 µg/m³	17h	1
2026-07-14	26	26–26	6.2 µg/m³	1h	1

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