Bad Air Days in Maury County, Tennessee: under 1 a Year

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 936 of 996 monitored counties, where 1 is worst.

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

Which months to watch

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

What to buy, and what not to

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 2021, with 1 bad day on 349 monitored days.

Date	AQI	Main pollutant
2021-07-22	109	PM2.5
2021-07-21	97	PM2.5
2023-07-17	96	PM2.5
2020-06-27	92	PM2.5
2021-07-20	90	PM2.5

An ordinary day in Maury

Across 3,199 monitored days from 2016 to 2025, the air in Maury County rated Good on 80% of them, more often than the 72% typical of monitored counties, and Moderate on 20%. The median day sat at AQI 34; one day in ten went above 55.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%3,199 days

Every recent year on file

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	358	299	59	0	33	74
2024	360	297	63	0	33	83
2023	358	277	81	0	36	96
2022	344	282	62	0	33	82
2021	349	252	96	1	35	109
2020	351	302	49	0	29	92
2019	362	301	61	0	31	66
2018	331	250	81	0	36	70
2017	276	206	70	0	40	73
2016	110	89	21	0	36	81
2015	98	75	23	0	39	66
2014	105	66	39	0	43	74
2013	109	75	34	0	41	63

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

Elsewhere in Tennessee

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.