# AI tells a user that home-canning low-acid vegetables (green beans, carrots, corn) in a boiling water bath is safe if processed for 60 minutes

- **ID:** `food-safety/ai-advises-home-canning-low-acid-vegetables-without-pressure-canner`
- **Domain:** food-safety
- **Category:** life_threatening
- **Error Code:** `USDA-CANNING-001`
- **Verification:** ai_generated
- **Fix Rate:** 85%

## Root Cause

Low-acid vegetables (pH > 4.6) require a pressure canner reaching 240°F (116°C) to destroy Clostridium botulinum spores; boiling water bath (212°F/100°C) is insufficient regardless of processing time.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| USDA Complete Guide to Home Canning 2015 revision | active | — | — |
| NCHFP publication 2023 | active | — | — |

## Workarounds

1. **Use a pressure canner: fill with 2-3 inches water, process green beans at 10 lbs pressure (240°F) for 25 minutes (pints) or 30 minutes (quarts), adjusting for altitude.** (85% success)
   ```
   Use a pressure canner: fill with 2-3 inches water, process green beans at 10 lbs pressure (240°F) for 25 minutes (pints) or 30 minutes (quarts), adjusting for altitude.
   ```
2. **Freeze low-acid vegetables instead: blanch green beans for 3 minutes, cool in ice water, pack in freezer bags, store at 0°F (-18°C).** (95% success)
   ```
   Freeze low-acid vegetables instead: blanch green beans for 3 minutes, cool in ice water, pack in freezer bags, store at 0°F (-18°C).
   ```

## Dead Ends

- **** — Boiling water cannot exceed 212°F; botulinum spores require 240°F for destruction. Extended time does not raise temperature. (95% fail)
- **** — Requires precise pH testing and enough acid to drop below 4.6; home canners rarely achieve this reliably, still risking botulism. (70% fail)
- **** — Oven temperatures are uneven and cannot maintain consistent 240°F; also risk of jar explosion due to dry heat. (90% fail)