Forest Heights
Maryland
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Luftqualität

Forest Heights · updated at 14:39
Air Quality Index · US EPA scale
Gut

Clean air, no risk for anyone.

Main pollutantO₃87.0 µg/m³41
050100150200300+
Temperatur22°Luftfeuchte62%Wind8 km/h NWUV-Index5

Health recommendations

Gut
General population

Great day for outdoor activities. A good time to air out the house.

Sensitive groups

No restrictions.

children, older adults, pregnant women and people with asthma, COPD or heart disease
Outdoor exerciseGo ahead
WindowsOpen is fine
MaskNot needed
Sensitive groupsNo restrictions

Next 24 hours

hourly AQI
43
O₃15:00
44
O₃16:00
42
O₃17:00
34
PM2.518:00
58
PM2.519:00
74
PM2.520:00
84
PM2.521:00
92
PM2.522:00
97
PM2.523:00
Morgen98
PM2.500:00
98
PM2.501:00
100
PM2.502:00
99
PM2.503:00
89
PM2.504:00
78
PM2.505:00
71
PM2.506:00
68
PM2.507:00
72
PM2.508:00
70
PM2.509:00
63
PM2.510:00
52
PM2.511:00
51
O₃12:00
51
O₃13:00
51
O₃14:00
Worst at 02:00 100Best at 18:00 34

Pollutants now

concentration · sub-index
What it isPM2.5

Fine particles under 2.5 µm — small enough to reach the lungs and bloodstream. They come from wildfires, diesel engines, industry and smoke, and are the pollutant most linked to heart and lung disease.

WHO 2021 guideline: 15.0 µg/m³ (24-h mean)
What it isPM10

Inhalable particles up to 10 µm: road and construction dust, pollen, soot and sea salt. They irritate the nose, throat and airways and worsen asthma and bronchitis.

WHO 2021 guideline: 45.0 µg/m³ (24-h mean)
What it isOzon (O₃)

Ground-level ozone forms when sunlight reacts with vehicle and industrial gases. It peaks on hot, sunny afternoons and causes coughing, chest pain and reduced lung function during exercise.

WHO 2021 guideline: 100 µg/m³ (24-h mean)
What it isStickstoffdioxid (NO₂)

A gas produced mainly by fuel burning in cars, trucks and power plants. Highest near busy roads. It inflames the airways and increases asthma attacks.

WHO 2021 guideline: 25.0 µg/m³ (24-h mean)
What it isSchwefeldioxid (SO₂)

A gas released by burning coal and oil in industry, refineries and ships. It irritates the eyes and airways; people with asthma are especially sensitive.

WHO 2021 guideline: 40.0 µg/m³ (24-h mean)
What it isKohlenmonoxid (CO)

A colourless, odourless gas from incomplete combustion — vehicle exhaust, stoves and fires. It reduces the blood's ability to carry oxygen and is dangerous in enclosed spaces.

WHO 2021 guideline: 4000 µg/m³ (24-h mean)
Tap a pollutant to read about it

Tap a day to see it hour by hour

Heute29/09Bedeckt23°17°
MäßigMain pollutant PM2.5avg 48min 28
97max
StündlichAQI · PM2.5 · main
00:005210µg/m³PM2.5
01:00468µg/m³PM2.5
02:00397µg/m³PM2.5
03:00346µg/m³PM2.5
04:00305µg/m³PM2.5
05:00285µg/m³PM2.5
06:00285µg/m³PM2.5
07:00305µg/m³PM2.5
08:00417µg/m³PM2.5
09:00509µg/m³PM2.5
10:00468µg/m³PM2.5
11:00397µg/m³PM2.5
12:00366µg/m³PM2.5
13:00376µg/m³O₃
14:00415µg/m³O₃
15:00435µg/m³O₃
16:00445µg/m³O₃
17:00425µg/m³O₃
18:00346µg/m³PM2.5
19:005813µg/m³PM2.5
20:007421µg/m³PM2.5
21:008427µg/m³PM2.5
22:009231µg/m³PM2.5
23:009734µg/m³PM2.5
Worst at 23:00Best at 05:00
Morgen30/09Sonnig28°15°
MäßigMain pollutant PM2.5avg 68min 51
100max
StündlichAQI · PM2.5 · main
00:009835µg/m³PM2.5
01:009835µg/m³PM2.5
02:0010035µg/m³PM2.5
03:009935µg/m³PM2.5
04:008930µg/m³PM2.5
05:007824µg/m³PM2.5
06:007120µg/m³PM2.5
07:006818µg/m³PM2.5
08:007220µg/m³PM2.5
09:007019µg/m³PM2.5
10:006316µg/m³PM2.5
11:005210µg/m³PM2.5
12:00518µg/m³O₃
13:00518µg/m³O₃
14:00518µg/m³O₃
15:00538µg/m³O₃
16:00588µg/m³O₃
17:00538µg/m³O₃
18:005210µg/m³PM2.5
19:006718µg/m³PM2.5
20:006818µg/m³PM2.5
21:006115µg/m³PM2.5
22:005712µg/m³PM2.5
23:005511µg/m³PM2.5
Worst at 02:00Best at 12:00
Do01/10Sonnig31°16°
Ungesund für empfindliche GruppenMain pollutant PM2.5avg 64min 44
102max
StündlichAQI · PM2.5 · main
00:005411µg/m³PM2.5
01:005411µg/m³PM2.5
02:005210µg/m³PM2.5
03:00519µg/m³PM2.5
04:00478µg/m³PM2.5
05:00448µg/m³PM2.5
06:00448µg/m³PM2.5
07:00468µg/m³PM2.5
08:005210µg/m³PM2.5
09:005511µg/m³PM2.5
10:005612µg/m³PM2.5
11:006812µg/m³O₃
12:008812µg/m³O₃
13:009810µg/m³O₃
14:001028µg/m³O₃
15:001026µg/m³O₃
16:00936µg/m³O₃
17:00786µg/m³O₃
18:00508µg/m³O₃
19:006014µg/m³PM2.5
20:006215µg/m³PM2.5
21:006014µg/m³PM2.5
22:005713µg/m³PM2.5
23:005612µg/m³PM2.5
Worst at 14:00Best at 05:00
Fr02/10Sonnig33°17°
Ungesund für empfindliche GruppenMain pollutant PM2.5avg 77min 53
136max
StündlichAQI · PM2.5 · main
00:005612µg/m³PM2.5
01:005511µg/m³PM2.5
02:005511µg/m³PM2.5
03:005411µg/m³PM2.5
04:005310µg/m³PM2.5
05:005310µg/m³PM2.5
06:005310µg/m³PM2.5
07:005511µg/m³PM2.5
08:006315µg/m³PM2.5
09:006718µg/m³PM2.5
10:006919µg/m³PM2.5
11:0010418µg/m³O₃
12:0012914µg/m³O₃
13:0013611µg/m³O₃
14:0013310µg/m³O₃
15:001259µg/m³O₃
16:001098µg/m³O₃
17:00888µg/m³O₃
18:005310µg/m³PM2.5
19:006617µg/m³PM2.5
20:007019µg/m³PM2.5
21:006818µg/m³PM2.5
22:006718µg/m³PM2.5
23:006617µg/m³PM2.5
Worst at 13:00Best at 04:00

Index scale

US EPA · 0 to 500
0 – 50
GutClean air, no risk for anyone.
51 – 100
MäßigAcceptable; unusually sensitive people may notice mild discomfort.
101 – 150
Ungesund für empfindliche GruppenChildren, older adults and people with heart or lung disease may have symptoms.
151 – 200
UngesundEveryone may feel effects; sensitive groups, more serious ones.
201 – 300
Sehr ungesundHealth alert: increased risk for the whole population.
301 – 500
GefährlichEmergency: the entire population is likely to be affected.

Index computed with the US EPA method from concentrations modelled by CAMS (Copernicus). These are model estimates, not station measurements; for official data check your local environmental agency.

Weather map

Wind, rain and temperature — Forest Heights
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Luftqualität in Forest Heights (MD) — 3 Tage

Luftqualität in Forest Heights (Maryland): Index (AQI), PM2.5, PM10, Ozon (O₃), Stickstoffdioxid (NO₂), Schwefeldioxid (SO₂) und Kohlenmonoxid (CO) für heute, morgen und übermorgen. Erfahren Sie, ob die Luft gut, mäßig, ungesund oder gefährlich ist.