Bad Air Days in Androscoggin County, Maine: under 1 a Year

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 921 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 and August. Averaged over 2016 to 2025.

What actually helps 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 record for Androscoggin

The worst recent year was 2025, with 2 bad days on 365 monitored days.

Date	AQI	Main pollutant
2025-07-26	112	PM2.5
2025-08-04	108	PM2.5
2017-06-12	100	Ozone
2017-04-11	97	Ozone
2022-07-01	97	Ozone

An ordinary day in Androscoggin

Across 3,603 monitored days from 2016 to 2025, the air in Androscoggin County rated Good on 85% of them, more often than the 72% typical of monitored counties, and Moderate on 15%. The median day sat at AQI 35; one day in ten went above 52.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)57%2,067 days
ozone42%1,508 days
coarse dust (PM10)1%28 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	365	311	52	2	0	34	112
2024	366	339	27	0	0	31	77
2023	359	296	63	0	0	35	77
2022	358	327	31	0	0	32	97
2021	356	303	53	0	0	36	95
2020	360	327	33	0	0	34	70
2019	361	327	34	0	0	33	76
2018	361	309	52	0	0	34	84
2017	359	233	126	0	0	44	100
2016	358	297	61	0	0	35	82
2015	358	236	122	0	0	43	97
2014	347	245	102	0	0	42	90
2013	361	271	90	0	0	38	95
2012	363	263	100	0	0	39	97
2011	365	234	131	0	0	41	93
2010	365	267	96	2	1	39	161

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

Maine 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.