Bad Air Days in Cerro Gordo County, Iowa

Not enough data

EPA monitors in Cerro Gordo County ran on too few days between 2016 and 2025 to give a fair yearly count (about 42% of days covered). Neighbouring counties below are a better guide.

Is a purifier worth it here?

EPA monitors here ran too few days to give a fair yearly count. Use AirNow for today's air.

The record for Cerro Gordo

Date	AQI	Main pollutant
2017-05-27	65	PM10
2022-10-20	61	PM10
2020-11-05	60	PM10
2016-11-05	59	PM10
2020-10-09	57	PM10

The air on a normal day

Across 1,235 monitored days from 2016 to 2023, the air in Cerro Gordo County rated Good on 99% of them, more often than the 72% typical of monitored counties, and Moderate on 1%. The median day sat at AQI 16; one day in ten went above 32.

The pollutant setting the AQI on an ordinary day here:

coarse dust (PM10)100%1,235 days

Every recent year on file

Year	Days monitored	Good	Moderate	Median AQI	Highest AQI
2023	60	58	2	19	56
2022	117	116	1	17	61
2021	120	118	2	19	56
2020	122	120	2	18	60
2019	118	118	0	15	38
2018	115	115	0	16	46
2017	233	231	2	15	65
2016	350	346	4	15	59
2015	357	352	5	16	58
2014	348	346	2	16	52
2013	334	332	2	18	60
2012	356	344	12	19	66
2011	358	347	11	19	62
2010	362	346	16	18	64

Nearby counties on file

How this is counted

A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day.