Bad Air Days in Monroe County, Michigan

Not enough data

EPA monitors in Monroe County ran on too few days between 2016 and 2025 to give a fair yearly count (about 20% 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 Monroe

The worst recent year was 2022, with 2 bad days on 61 monitored days.

Date	AQI	Main pollutant
2022-07-22	607	PM10
2022-11-19	107	PM10
2017-01-16	88	PM2.5
2022-03-12	82	PM10
2023-06-29	82	PM10

An ordinary day in Monroe

Across 665 monitored days from 2016 to 2024, the air in Monroe County rated Good on 83% of them, more often than the 72% typical of monitored counties, and Moderate on 16%. The median day sat at AQI 26; one day in ten went above 49.

The pollutant setting the AQI on an ordinary day here:

coarse dust (PM10)65%429 days
fine particles (PM2.5)35%236 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2024	59	56	3	0	0	18	77
2023	65	59	6	0	0	25	82
2022	61	51	8	2	1	26	607
2021	61	57	4	0	0	19	77
2020	61	58	3	0	0	17	66
2019	61	57	4	0	0	16	76
2018	61	60	1	0	0	13	59
2017	116	78	38	0	0	38	88
2016	120	79	41	0	0	41	72
2015	118	69	48	1	0	44	101
2014	116	60	56	0	0	50	95
2013	116	64	52	0	0	46	73
2012	124	59	64	1	0	52	105
2011	127	67	60	0	0	49	82
2010	123	68	54	1	0	47	117

Elsewhere in Michigan

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.