Monitored days with good air quality
81.8%
2025 · U.S. EPA AirData
Annual wildfires
400
Area in drought (D1–D4), yearly average
43.1%
2025 · U.S. Drought Monitor
Daily water withdrawals
1.3 B gallons
Energy-related CO₂ emissions
52.6
2021 · U.S. EIA State Energy Data System
Average annual temperature
55.7
2025 · NOAA National Centers for Environmental Information
Air Quality
Monitored days with good air quality
81.8%
2025 · U.S. EPA AirData
Monitored days unhealthy for sensitive groups or worse
0.3%
2025 · U.S. EPA AirData
Days above ozone standard
18
PM2.5 average
8.1 µg/m³
Baltimore AQI (median)
44
Monitored days with good air quality
1990–202581.8%
U.S. EPA AirData, Annual AQI by County, all monitored Maryland counties.
Monitored days unhealthy for sensitive groups or worse
1990–20250.3%
U.S. EPA AirData, Annual AQI by County (AQI above 100).
Wildfires
Annual wildfires
400
Acres burned
3,200
Rank
Low risk
Drought
Area in drought (D1–D4), yearly average
43.1%
2025 · U.S. Drought Monitor
Area in extreme or exceptional drought (D3–D4)
0.0%
2025 · U.S. Drought Monitor
Area in drought
8%
Worst recent drought
2024
Reservoir storage
Normal
Area in drought (D1–D4), yearly average
2000–202543.1%
U.S. Drought Monitor (NDMC / USDA / NOAA), average of weekly maps.
Area in extreme or exceptional drought (D3–D4)
2000–20250%
U.S. Drought Monitor (NDMC / USDA / NOAA), average of weekly maps.
Water Usage
Daily water withdrawals
1.3 B gallons
Public supply share
28%
Chesapeake Bay watershed
95% of the state
- •Maryland's Chesapeake Bay is the largest estuary in the United States.
Emissions
Energy-related CO₂ emissions
52.6
2021 · U.S. EIA State Energy Data System
Transportation CO₂ emissions
27.6
2021 · U.S. EIA State Energy Data System
CO2 emissions
46 MMT
Per capita
7.4 metric tons
Rank (per capita)
4th lowest
Energy-related CO₂ emissions
1970–202152.6▼ 29%
U.S. EIA State Energy Data System, all sectors and fuels (FRED EMISSCO2TOTVTTTOMDA).
Transportation CO₂ emissions
1970–202127.6▲ 42%
U.S. EIA State Energy Data System, transportation sector (FRED EMISSCO2TOTVTCTOMDA).
| Indicator | Maryland | U.S. |
|---|---|---|
| CO2 emissions per capita (t) | 7.4 | 14.7 |
Climate Indicators
Average annual temperature
55.7
2025 · NOAA National Centers for Environmental Information
Annual precipitation
38.4
2025 · NOAA National Centers for Environmental Information
Average temperature change since 1900
+2.3 °F
Sea level rise (Baltimore)
+1 ft since 1950
Average annual temperature
1895–202555.7▲ 7%
NOAA National Centers for Environmental Information, Climate at a Glance, statewide January–December average.
Annual precipitation
1895–202538.37▲ 8%
NOAA National Centers for Environmental Information, Climate at a Glance, statewide January–December total.