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Canning at about 110 ft in Philadelphia
Good news: at about 110 ft, Philadelphia sits inside the 0–1,000 ft band — the very band every tested recipe was written for. Water-bath times exactly as printed, 10 lb on a weighted gauge, 11 lb on a dial.
PHILADELPHIA, PENNSYLVANIA
- ELEVATION
- ≈110 FT
- WATER BATH
- +0 MIN
- DIAL GAUGE
- 11 LB
- WEIGHTED
- 10 LB
Adjustments use the 0–1,000 ft band, so small elevation differences nearby rarely change your numbers.
canningdates.com
canningdates.com — Philadelphia, PA at about 110 ft, from the published USDA adjustment bands. Low-acid foods must be pressure canned.
Philadelphia at about 110 ft
Philadelphia spreads between two rivers at about 110 ft, and nothing in the city — Chestnut Hill included, whose name promises more than its elevation delivers — leaves the first band. Can at the printed times.
Adjustments come in bands, not curves: everything in the 0–1,000 ft band shares one answer — the recipe exactly as tested. A hill on one side of Philadelphia or a valley on the other changes nothing here.
As for the number itself: Philadelphia's elevation was checked against the USGS elevation service, starting from the NOAA weather-station inventory (PHILADELPHIA NE AP). Elevation shifts block to block in any town, but the bands are wide on purpose — a station a few miles out almost never changes the row.
Not your kitchen? The altitude lookup turns any ZIP or town into a card like this one. Recipe already in hand? The processing time adjuster takes your recipe's minutes and applies Philadelphia's band for you.
Frequently asked questions
Do I need to adjust canning recipes in Philadelphia?
No. At about 110 ft, Philadelphia sits inside the 0–1,000 ft band — the elevation range every tested recipe was written for. The minutes printed on the recipe card are your minutes, exactly as they stand.
What pressure does a canner run at in Philadelphia?
The tested base settings: 10 lb on a weighted gauge, 11 lb on a dial gauge. No altitude correction applies until a kitchen climbs out of the 0–1,000 ft band, and Philadelphia is comfortably inside it.
What if I can somewhere higher — a cabin, a family place in the hills?
Then the bands take over: above the 0–1,000 ft band, a water bath owes extra minutes and pressure settings climb. Look the town up before you pack the jars — the numbers follow the ground, not the kitchen the recipe was written in.
Why do recipes talk about altitude at all if Philadelphia needs no changes?
Because water boils cooler as elevation rises, and a cooler bath needs more time to deliver the tested heat. At about 110 ft, the boiling point is close enough to the tested conditions that no correction is needed — that's exactly what the 0–1,000 ft band means.