What is the air quality trend in Potomac?

Over the past 15 days, Potomac had an average AQI of 60 based on station measurements. The worst day was 2026-07-17 with AQI 169.

How is Potomac air quality measured?

Air quality in Potomac 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 Potomac, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 29 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	24	23–25	5.7 µg/m³	2h	28
2026-07-21	53	27–75	14.5 µg/m³	24h	28
2026-07-20	71	58–100	21.4 µg/m³	24h	27
2026-07-19	72	36–288	27.6 µg/m³	24h	29
2026-07-18	131	58–161	51.7 µg/m³	24h	30
2026-07-17	169	61–220	102.0 µg/m³	24h	31
2026-07-16	65	55–151	18.6 µg/m³	24h	28
2026-07-15	51	42–69	12.8 µg/m³	24h	30
2026-07-14	40	33–52	9.7 µg/m³	24h	28
2026-07-13	36	22–44	8.6 µg/m³	24h	28
2026-07-12	42	30–56	10.2 µg/m³	24h	27
2026-07-11	42	16–54	10.2 µg/m³	24h	22
2026-07-10	43	26–64	11.1 µg/m³	24h	27
2026-07-09	35	25–41	8.3 µg/m³	24h	28
2026-07-08	37	25–47	8.9 µg/m³	21h	29

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