MD · free air
Free air in Maryland
Is air free in Maryland?
Owner decidesNot by law. Maryland has no free-air law, so each station owner decides. Of the 350 places with air we have mapped in Maryland, 170 (49 %) are free or usually free, mostly at Wawa, Sheetz and Lowe's, plus tire shops such as Mavis Discount Tire that fill tires for free.
- places with air
- 350
- free or usually free
- 170
- tire shops fill free
- 6
- open 24/7 (known)
- 128
Chains with air in Maryland
The brands with the most locations on our Maryland map, and what to expect at each.
| Chain | Locations in MD | Free air |
|---|---|---|
| Wawa | 66 | Usually free |
| Sheetz | 51 | Usually free |
| Exxon | 34 | Depends on the store |
| Lowe's | 28 | Usually free |
| Shell | 24 | Depends on the store |
| Royal Farms | 16 | Usually free |
| Sunoco | 15 | Depends on the store |
| Costco | 12 | Free for members |
| BP | 8 | Depends on the store |
| 7-Eleven | 8 | Depends on the store |
| Pilot and Flying J | 7 | Usually free |
| Marathon | 6 | Depends on the store |
| Citgo | 5 | Depends on the store |
| Valero | 5 | Depends on the store |
| Mavis Discount Tire | 5 | Free, staff fill |
Free air by city in Maryland
Number of places with air per city. Cities with a link have their own page with every address.
- Baltimore4 free / 23
- Frederick16
- Hagerstown14
- Silver Spring10
- Gaithersburg7
- Bel Air7
- Severna Park7
- Bowie7
- Glen Burnie7
- Rockville6
- Cockeysville6
- Salisbury6
- Elkridge6
- Towson5
- Elkton5
- Charlotte Hall5
- Germantown5
- California5
- Westminster5
- Hyattsville4
- Pasadena4
- Kensington4
- Owings Mills3
- Cumberland3
- Hanover3
- Beltsville3
- Montgomery Village3
- Wheaton3
- Waldorf3
- Columbia3
- Middle River3
- Mount Rainier3
- North East3
- Oakland2
- Prince Frederick2
- Dunkirk2
- Annapolis2
- Joppa2
- Port Deposit2
- Edgewood2
- Linthicum Heights2
- North Bethesda2
- Thurmont2
- Chevy Chase2
- Ellicott City2
- Catonsville2
- Reisterstown2
- Parkville2
- College Park2
Confirmed free air pumps in Maryland
Places where drivers or the operator confirmed the air is free.
Wawa
Free6541 Eastern Ave, Baltimore, MD 21224
Hours: Open 24/7
Royal Farms
FreeBaltimore, MD 21211
Exxon
FreeCavetown, MD 21783
Sheetz
Free37692 John Knight Drive, Charlotte Hall, MD 20622
Hours: Open 24/7
Air pump
FreeCockeysville, MD 21030
Royal Farms
FreeCockeysville, MD 21031
Wawa
Free1657 Elkton Road, Elkton, MD 21921
Hours: Open 24/7
Sheetz
Free751 Progress Way, Gaithersburg, MD 20879
Hours: Open 24/7
Sheetz
Free3842 Burkittsville Road, Knoxville, MD 21758
Hours: Open 24/7
Sheetz
Free5 North 3rd Street, Oakland, MD 21550
Hours: Open 24/7
Air pump
FreeOwings Mills, MD 21117
Wawa
Free400 Overlook Court, Perryville, MD 21903
Hours: Open 24/7
Wawa
Free305 North Solomons Island Road, Prince Frederick, MD 20678
Hours: Open 24/7
Air pump
FreeRockville, MD 20850
Carroll Fuel
FreeTowson, MD 21204
Winter tire pressure in Maryland
−4 PSI
typical drop from July to January
The average temperature in Maryland goes from about 78 °F in July to 35 °F in January. Tire pressure falls roughly 1 PSI for every 10 °F, so a tire set to 35 PSI on a summer afternoon reads about 31 PSI on an average winter morning.
Most tire pressure warning lights switch on when a tire is about 25 % below its recommended pressure. A cold front plus a slow leak gets there fast, so check your tires as soon as the first cold mornings arrive.
Free air in neighboring states
- Delaware77 places
- Washington, DC40 places
- Pennsylvania1,251 places
- Virginia877 places
- West Virginia157 places
Free air in Maryland: questions
Is air free at gas stations in Maryland?
Only where the owner chooses. Maryland doesn't require free air, so many stations use coin or card machines that cost one to two dollars. Chains that give air away at most stores are your best bet, and some clerks switch a paid machine to free if you ask.
Which gas stations have free air in Maryland?
On our map, the chains with the most free or usually free air pumps in Maryland are Wawa (66), Sheetz (51), Lowe's (28) and Royal Farms (16). At franchised brands like Shell, BP or Exxon, it depends on the owner.
Where can I check my tire pressure for free in Maryland?
Tire shops are the easiest option: Mavis Discount Tire (5 locations) check and fill tires for free during business hours, no purchase needed.
How much does tire pressure drop in winter in Maryland?
Maryland averages about 78 °F in July and 35 °F in January (NOAA, 2015–2024). At roughly 1 PSI per 10 °F, tires filled in summer lose about 4 PSI by midwinter, often enough to switch on the low-pressure warning. Top them up when the weather turns.
Which city in Maryland has the most free air pumps?
On our map, Frederick has the most free or usually free spots in Maryland: 14 of 16 places with air.