Stay updated with real-time air quality in Middletown, Delaware featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
36
Good
Middletown, Delaware
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.17 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.19 μg/m³
0
55
155
255
425
605+
38.97 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
2.86 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Middletown, Delaware
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AQI 35
Good
3.16μg/m³
PM2.5
13.82μg/m³
PM10
38.05ppb
O3
0.28ppb
SO2
2.42ppb
NO2
0.27ppm
CO
AQI 38
Good
6.83μg/m³
PM2.5
31.72μg/m³
PM10
38.12ppb
O3
0.35ppb
SO2
2.12ppb
NO2
0.26ppm
CO
AQI 37
Good
2.26μg/m³
PM2.5
10.16μg/m³
PM10
40.17ppb
O3
0.30ppb
SO2
2.40ppb
NO2
0.27ppm
CO
AQI 35
Good
3.27μg/m³
PM2.5
14.07μg/m³
PM10
38.04ppb
O3
0.27ppb
SO2
2.45ppb
NO2
0.27ppm
CO
AQI 34
Good
3.29μg/m³
PM2.5
14.23μg/m³
PM10
37.45ppb
O3
0.27ppb
SO2
2.73ppb
NO2
0.28ppm
CO
AQI 34
Good
3.54μg/m³
PM2.5
15.74μg/m³
PM10
36.94ppb
O3
0.28ppb
SO2
2.79ppb
NO2
0.28ppm
CO
The air quality data for Delaware, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Middletown, Delaware are available every hour.
Middletown, Delaware experienced its worst air quality at 04:00:00, 2026-03-09.
The best air quality in Middletown, Delaware was observed at 03:00:00 on 2026-03-09.
The air quality in Middletown, Delaware right now is Good, with an AQI of 36.
In Middletown, Delaware, O3 is the most frequently found pollutant.
When air quality in Middletown, Delaware is compromised, staying indoors and wearing a mask can reduce health risks.
Middletown, Delaware currently has a PM2.5 concentration of 3.166 μg/m3.
Middletown, Delaware currently has a PM10 concentration of 14.194 μg/m3.
The current carbon monoxide (CO) level in Middletown, Delaware is 0.268 ppm.
The current sulfur dioxide (SO2) concentration in Middletown, Delaware is 0.29 ppb.
Middletown, Delaware currently has an ozone (O3) concentration of 38.965 ppm.
The current level of nitrogen dioxide (NO2) in Middletown, Delaware is 2.858 ppb.
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