Air Quality in Union, South Dakota
44
Median AQI (2021)
167
Max AQI (2021)
→ stable
10-Year Trend
Ozone
Primary Pollutant
179
Good Days (2021)
1
Monitoring Stations
AQI Trend (Median)
Air Quality Days by Category
Annual Summary
| Year | Median AQI | Max AQI | Good Days | Moderate Days | Unhealthy Days | Ozone Days | PM2.5 Days |
|---|---|---|---|---|---|---|---|
| 2021 | 44 | 167 | 179 | 90 | 4 | 155 | 117 |
| 2020 | 39 | 141 | 304 | 61 | 1 | 209 | 139 |
| 2019 | 37 | 97 | 306 | 58 | 0 | 233 | 121 |
| 2018 | 43 | 112 | 256 | 106 | 3 | 192 | 141 |
| 2017 | 41 | 100 | 278 | 87 | 0 | 229 | 133 |
| 2016 | 38 | 112 | 295 | 69 | 2 | 200 | 153 |
| 2015 | 43 | 108 | 243 | 120 | 2 | 142 | 216 |
Recent Daily AQI
| Date | AQI | Category | Primary Pollutant |
|---|---|---|---|
| Sep 30, 2021 | 28 | Good | PM2.5 |
| Sep 29, 2021 | 63 | Moderate | PM2.5 |
| Sep 28, 2021 | 61 | Moderate | Ozone |
| Sep 27, 2021 | 52 | Moderate | PM2.5 |
| Sep 26, 2021 | 46 | Good | Ozone |
| Sep 25, 2021 | 35 | Good | Ozone |
| Sep 24, 2021 | 35 | Good | Ozone |
| Sep 23, 2021 | 44 | Good | Ozone |
| Sep 22, 2021 | 34 | Good | Ozone |
| Sep 21, 2021 | 31 | Good | Ozone |
| Sep 20, 2021 | 31 | Good | PM2.5 |
| Sep 19, 2021 | 40 | Good | Ozone |
| Sep 18, 2021 | 44 | Good | Ozone |
| Sep 17, 2021 | 36 | Good | Ozone |
| Sep 16, 2021 | 51 | Moderate | PM2.5 |
| Sep 15, 2021 | 41 | Good | Ozone |
| Sep 14, 2021 | 32 | Good | Ozone |
| Sep 13, 2021 | 46 | Good | PM2.5 |
| Sep 12, 2021 | 31 | Good | Ozone |
| Sep 11, 2021 | 57 | Moderate | PM2.5 |
| Sep 10, 2021 | 41 | Good | Ozone |
| Sep 9, 2021 | 36 | Good | Ozone |
| Sep 8, 2021 | 36 | Good | Ozone |
| Sep 7, 2021 | 43 | Good | Ozone |
| Sep 6, 2021 | 43 | Good | Ozone |
| Sep 5, 2021 | 43 | Good | Ozone |
| Sep 4, 2021 | 35 | Good | Ozone |
| Sep 3, 2021 | 21 | Good | Ozone |
| Sep 2, 2021 | 42 | Good | PM2.5 |
| Sep 1, 2021 | 45 | Good | Ozone |
| Aug 31, 2021 | 41 | Good | Ozone |
| Aug 30, 2021 | 38 | Good | Ozone |
| Aug 29, 2021 | 43 | Good | Ozone |
| Aug 28, 2021 | 52 | Moderate | PM2.5 |
| Aug 27, 2021 | 39 | Good | Ozone |
| Aug 26, 2021 | 31 | Good | Ozone |
| Aug 25, 2021 | 39 | Good | Ozone |
| Aug 24, 2021 | 52 | Moderate | PM2.5 |
| Aug 23, 2021 | 37 | Good | Ozone |
| Aug 22, 2021 | 40 | Good | Ozone |
| Aug 21, 2021 | 48 | Good | PM2.5 |
| Aug 20, 2021 | 38 | Good | PM2.5 |
| Aug 19, 2021 | 43 | Good | Ozone |
| Aug 18, 2021 | 50 | Good | PM2.5 |
| Aug 17, 2021 | 44 | Good | PM2.5 |
| Aug 16, 2021 | 44 | Good | Ozone |
| Aug 15, 2021 | 43 | Good | Ozone |
| Aug 14, 2021 | 40 | Good | Ozone |
| Aug 13, 2021 | 45 | Good | PM2.5 |
| Aug 12, 2021 | 49 | Good | PM2.5 |
| Aug 11, 2021 | 53 | Moderate | PM2.5 |
| Aug 10, 2021 | 63 | Moderate | PM2.5 |
| Aug 9, 2021 | 64 | Moderate | PM2.5 |
| Aug 8, 2021 | 40 | Good | Ozone |
| Aug 7, 2021 | 57 | Moderate | PM2.5 |
| Aug 6, 2021 | 63 | Moderate | PM2.5 |
| Aug 5, 2021 | 64 | Moderate | PM2.5 |
| Aug 4, 2021 | 55 | Moderate | PM2.5 |
| Aug 3, 2021 | 46 | Good | Ozone |
| Aug 2, 2021 | 44 | Good | Ozone |
| Aug 1, 2021 | 39 | Good | Ozone |
| Jul 31, 2021 | 153 | Unhealthy | PM2.5 |
| Jul 30, 2021 | 167 | Unhealthy | PM2.5 |
| Jul 29, 2021 | 126 | Unhealthy for Sensitive Groups | PM2.5 |
| Jul 28, 2021 | 54 | Moderate | PM2.5 |
| Jul 27, 2021 | 54 | Moderate | PM2.5 |
| Jul 26, 2021 | 61 | Moderate | PM2.5 |
| Jul 25, 2021 | 51 | Moderate | Ozone |
| Jul 24, 2021 | 52 | Moderate | PM2.5 |
| Jul 23, 2021 | 66 | Moderate | PM2.5 |
| Jul 22, 2021 | 70 | Moderate | PM2.5 |
| Jul 21, 2021 | 57 | Moderate | PM2.5 |
| Jul 20, 2021 | 52 | Moderate | PM2.5 |
| Jul 19, 2021 | 52 | Moderate | PM2.5 |
| Jul 18, 2021 | 53 | Moderate | PM2.5 |
| Jul 17, 2021 | 57 | Moderate | PM2.5 |
| Jul 16, 2021 | 72 | Moderate | PM2.5 |
| Jul 15, 2021 | 65 | Moderate | PM2.5 |
| Jul 14, 2021 | 40 | Good | Ozone |
| Jul 13, 2021 | 48 | Good | PM2.5 |
| Jul 12, 2021 | 60 | Moderate | PM2.5 |
| Jul 11, 2021 | 56 | Moderate | PM2.5 |
| Jul 10, 2021 | 31 | Good | Ozone |
| Jul 9, 2021 | 38 | Good | Ozone |
| Jul 8, 2021 | 38 | Good | PM2.5 |
| Jul 7, 2021 | 43 | Good | PM2.5 |
| Jul 6, 2021 | 39 | Good | Ozone |
| Jul 5, 2021 | 51 | Moderate | PM2.5 |
| Jul 4, 2021 | 55 | Moderate | PM2.5 |
| Jul 3, 2021 | 55 | Moderate | PM2.5 |
Monitoring Stations
Union County #2 Renken
Frequently Asked Questions
What is the air quality in Union, South Dakota?
Based on EPA data from 2021, Union has a median Air Quality Index (AQI) of 44, which is classified as "Good." The primary pollutant is Ozone. Over the past 10 years, air quality has been stable.
Is Union a good place to live for air quality?
Union has a 10-year average median AQI of 40. In 2021, there were 179 days with "Good" air quality and 4 days with unhealthy conditions. No special precautions are needed for most people.
What pollutants affect Union the most?
The primary pollutant driving the AQI in Union is Ozone. This is monitored by 1 active EPA stations in the county. Other pollutants tracked include ozone, PM10, nitrogen dioxide, sulfur dioxide, and carbon monoxide.
How many air quality monitoring stations are in Union?
There are 1 active EPA monitoring stations in Union, South Dakota. These stations continuously measure pollutant levels and contribute to the daily AQI calculations.