Bad Air Days in White Pine County, Nevada: 2 a Year

2 bad air days a year

Fewer bad air days than most monitored US counties. Ranked 548 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly ozone: summer smog (0% particle days).

Which months to watch

Most bad days here fall in June and August and 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 record for White Pine

In 2000 to 2009 this county averaged 7 bad days a year; in 2016 to 2025, 2. The air has improved. The worst recent year was 2018, with 6 bad days on 355 monitored days.

Date	AQI	Main pollutant
2020-08-21	136	Ozone
2021-08-06	133	Ozone
2021-07-25	122	Ozone
2020-08-20	112	Ozone
2025-08-04	112	Ozone

Most days, not the worst ones

Across 3,589 monitored days from 2016 to 2025, the air in White Pine County rated Good on 79% of them, more often than the 72% typical of monitored counties, and Moderate on 20%. The median day sat at AQI 44; one day in ten went above 61.

The pollutant setting the AQI on an ordinary day here:

ozone99%3,540 days
fine particles (PM2.5)1%49 days

Every recent year on file

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	361	278	80	3	45	112
2024	362	269	91	2	44	105
2023	361	293	68	0	44	93
2022	346	287	59	0	44	87
2021	364	280	82	2	44	133
2020	361	294	64	3	44	136
2019	362	294	67	1	44	101
2018	355	259	90	6	44	108
2017	356	289	67	0	44	90
2016	361	300	61	0	43	93
2015	358	294	62	2	42	115
2014	347	301	45	1	43	101
2013	360	279	75	6	44	119
2012	354	227	114	13	46	133
2011	362	211	146	5	48	115
2010	352	268	83	1	45	122

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