Bad Air Days in Hall County, Georgia: under 1 a Year

under 1 bad air day a year

Rare: among the cleanest-air counties EPA monitors. Ranked 794 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly particles: smoke and dust (100% particle days).

The bad-air season here

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

Is a purifier worth it here?

Bad air days are rare here. A standard furnace filter is enough; no purifier needed for outdoor air.
On the odd bad day, check AirNow and keep windows shut.

The worst days on file

The worst recent year was 2016, with 2 bad days on 119 monitored days.

Date	AQI	Main pollutant
2016-11-14	156	PM2.5
2023-07-18	137	PM2.5
2016-11-11	133	PM2.5
2023-06-29	125	PM2.5
2023-07-17	124	PM2.5

The air on a normal day

Across 3,217 monitored days from 2016 to 2025, the air in Hall County rated Good on 57% of them, less often than the 72% typical of monitored counties, and Moderate on 43%. The median day sat at AQI 47; one day in ten went above 62.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%3,217 days

Every recent year on file

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	364	210	154	0	0	46	82
2024	366	176	190	0	0	52	100
2023	363	166	194	3	0	52	137
2022	364	217	147	0	0	46	79
2021	365	209	156	0	0	46	83
2020	360	221	139	0	0	44	99
2019	340	181	159	0	0	49	90
2018	322	220	102	0	0	41	72
2017	254	144	110	0	0	48	72
2016	119	78	39	2	1	40	156
2015	264	81	183	0	0	55	95
2014	318	114	204	0	0	55	96
2013	342	145	197	0	0	53	91
2012	328	121	207	0	0	54	78
2011	351	94	257	0	0	57	99
2010	354	94	260	0	0	60	99

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

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.