What is the air quality trend in Round Lake?

Over the past 15 days, Round Lake had an average AQI of 45 based on station measurements. The worst day was 2026-07-16 with AQI 84.

How is Round Lake air quality measured?

Air quality in Round Lake 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 Round Lake, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

227h

PM2.5 Station

227h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	29	24–34	7.0 µg/m³	2h	1
2026-07-21	14	1–38	3.3 µg/m³	18h	1
2026-07-20	31	16–44	7.5 µg/m³	24h	1
2026-07-19	52	19–82	14.2 µg/m³	24h	1
2026-07-18	30	4–56	7.2 µg/m³	9h	1
2026-07-17	80	11–121	26.6 µg/m³	24h	1
2026-07-16	84	5–129	28.1 µg/m³	21h	1
2026-07-15	45	37–79	11.5 µg/m³	8h	1
2026-07-14	52	49–62	12.9 µg/m³	11h	1
2026-07-13	55	45–77	14.3 µg/m³	19h	1
2026-07-12	45	36–52	10.9 µg/m³	15h	1
2026-07-11	40	31–54	9.7 µg/m³	17h	1
2026-07-10	32	20–52	7.8 µg/m³	18h	1
2026-07-09	42	38–47	10.1 µg/m³	7h	1
2026-07-08	52	44–85	13.4 µg/m³	10h	1

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