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Canning at about 800 ft in San Antonio
Good news: at about 800 ft, San Antonio 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.
SAN ANTONIO, TEXAS
- ELEVATION
- ≈800 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 — San Antonio, TX at about 800 ft, from the published USDA adjustment bands. Low-acid foods must be pressure canned.
San Antonio at about 800 ft
San Antonio sits at about 800 ft — closer to the 1,000 ft line than Houston, Dallas, or Austin. Downtown still cans at printed times, but the Hill Country suburbs rising to the north can cross into the 5-extra-minutes band, so it's worth knowing which side of the line your neighborhood falls on.
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 San Antonio or a valley on the other changes nothing here.
As for the number itself: San Antonio's elevation was checked against the USGS elevation service, starting from the NOAA weather-station inventory (SAN ANTONIO INTL 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 San Antonio's band for you.
Frequently asked questions
Do I need to adjust canning recipes in San Antonio?
No. At about 800 ft, San Antonio 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 San Antonio?
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 San Antonio 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 San Antonio needs no changes?
Because water boils cooler as elevation rises, and a cooler bath needs more time to deliver the tested heat. At about 800 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.