Bad Air Days in Albany County, Wyoming: 6 a Year

6 bad air days a year

More bad air days than three quarters of monitored counties. Ranked 173 of 996 monitored counties, where 1 is worst.

What makes them bad: a mix of particles and ozone (52% particle days).

Which months to watch

Most bad days here fall in July and August. Averaged over 2016 to 2025.

What to buy, and what not to

Particles (wildfire smoke, dust) cause enough bad days here to matter. A HEPA purifier sized to your bedroom removes them; run it with windows shut on bad days.

The record for Albany

In 2000 to 2009 this county averaged 7 bad days a year; in 2016 to 2025, 6. Not much has changed. The worst recent year was 2021, with 14 bad days on 365 monitored days.

Date	AQI	Main pollutant
2021-12-05	312	PM10
2020-10-06	187	PM2.5
2024-04-07	187	PM10
2025-12-17	172	PM10
2020-10-14	168	PM10

Most days, not the worst ones

Across 3,653 monitored days from 2016 to 2025, the air in Albany County rated Good on 61% of them, less often than the 72% typical of monitored counties, and Moderate on 38%. The median day sat at AQI 48; one day in ten went above 72.

The pollutant setting the AQI on an ordinary day here:

ozone80%2,917 days
coarse dust (PM10)17%617 days
fine particles (PM2.5)3%98 days
nitrogen dioxide1%21 days

Albany County by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	365	203	150	12	2	49	172
2024	366	190	163	13	1	50	187
2023	365	212	149	4	0	48	132
2022	365	225	136	4	2	48	159
2021	365	193	158	14	1	50	312
2020	366	251	106	9	2	46	187
2019	365	245	120	0	0	47	90
2018	365	218	144	3	0	48	115
2017	365	219	143	3	1	49	154
2016	366	263	103	0	0	46	97
2015	365	277	88	0	0	46	93
2014	365	280	85	0	0	46	93
2013	364	235	126	3	0	47	122
2012	365	176	182	7	0	51	125
2011	365	230	131	4	0	47	108
2010	365	225	137	3	0	48	116

*2025 may be a partial year in EPA's file.

Wyoming compared

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, and on why a purifier does not touch ozone in smoke vs ozone.