Home-canned pickles, salsas, and shelf-stable jars sold direct to Iowa buyers
Iowa's cottage food law requires each batch of home-canned pickles, vegetables, or fruit to be measured with a calibrated pH meter or water activity meter — a recipe that tested safe once does not automatically clear every future batch.
If your product can't reliably hit pH 4.60 or aw 0.85 (many low-acid vegetables, all meats), it needs a scheduled process from a recognized process authority and typically a licensed food establishment or FDA-registered acidified/low-acid canned food facility — not cottage food.
Add the processing and canning date to every jar, keep your batch pH/aw logs on file, and be ready to hand them to a regulator or buyer on request — this documentation duty is written into the statute.
| Item | Rule | Regulator |
|---|---|---|
| Pickles/vegetables/fruit, pH ≤4.60 or aw ≤0.85 | Cottage food eligible; batch-tested and dated | Iowa Code 137F.20 |
| Low-acid canned goods (not pH-tested safe) | Needs a scheduled process + licensed/registered facility | FDA 21 CFR 108/113 |
| Batch testing | pH meter or water activity meter, every batch | Iowa Code 137F.20 |
| Labeling | Processing/canning date required in addition to standard cottage label | Iowa Code 137F.20 |
| Documentation on request | Batch test records available to regulator or buyer | Iowa Code 137F.20 |
Anecdote isn't a safety test. Untested low-acid canned vegetables like plain green beans are exactly the category responsible for most home-canning botulism risk, and they fall outside cottage food without a validated process.
pH measures acidity (targeting 4.60 or below); water activity measures available moisture (targeting 0.85 or below). Either one, properly measured per batch with a calibrated meter, satisfies the cottage food standard.
Most salsas can be formulated to pH 4.60 or below with enough vinegar or citric acid, but you still must test and document each batch — don't assume based on the recipe alone.
Land-grant university extension programs and private process authorities can develop and certify a scheduled process; this is required before a low-acid canned product can be legally sold outside cottage food.