Bad Air Days in Franklin County, Maine: 0 a Year
0 bad air days a year
Rare: among the cleanest-air counties EPA monitors. Ranked 965 of 996 monitored counties, where 1 is worst.
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 Franklin
| Date | AQI | Main pollutant |
|---|---|---|
| 2017-01-10 | 75 | PM2.5 |
| 2016-12-20 | 72 | PM2.5 |
| 2017-06-12 | 72 | PM2.5 |
| 2017-03-07 | 69 | PM2.5 |
| 2017-02-23 | 66 | PM2.5 |
The air on a normal day
Across 589 monitored days from 2016 to 2017, the air in Franklin County rated Good on 87% of them, more often than the 72% typical of monitored counties, and Moderate on 13%. The median day sat at AQI 23; one day in ten went above 50.
The pollutant setting the AQI on an ordinary day here:
- fine particles (PM2.5)100%589 days
Every recent year on file
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2017 | 242 | 202 | 40 | 0 | 0 | 27 | 75 |
| 2016 | 347 | 313 | 34 | 0 | 0 | 21 | 72 |
| 2015 | 49 | 48 | 1 | 0 | 0 | 11 | 51 |
Nearby counties on file
- York County2/yr
- Hancock County2/yr
- Cumberland County2/yr
- Aroostook County2/yr
- Knox County1/yr
- Penobscot Countyunder 1/yr
- Sagadahoc Countyunder 1/yr
- Oxford Countyunder 1/yr
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.