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Home / Ingredients for home canning / Water’s Role in Home Canning

Water’s Role in Home Canning

Water has such a huge role in home canning, yet we take it for granted.

There are three issues to consider:

1) Clean, safe, potable water (See page on bacterial load.)

2) Hard water (See page on hard water.)

3) Using fresh water instead of blanching water to fill the canning jars, to reduce starch density inside the jar on some blanched items such as potatoes. (See page on fresh water in jars.)

See also the page on: Acidity of water and vinegar combinations.

Note as well that canning directions for fish and seafood explicitly advise against using stream, lake or seawater either for washing the fish or seafood in, or, for filling the jars with. They strongly recommend that you use potable tap water instead.

Contents hide
  • 1 Nitrate or nitrite in well water
    • 1.1 Hard water and home canning
    • 1.2 Vinegar in canning water
    • 1.3 Why some canning directions call for fresh water

Nitrate or nitrite in well water

Kansas State University Extension offers this advice:

If you use well water, annual testing for water safety is important. If your report shows high levels of nitrate and/or nitrite, steps must be made to make the water safe.

In home canning or in cooking, boiling the water will not remove nitrate or nitrite. In fact, heat will concentrate and increase the content. The Environmental Protection Agency states the maximum total nitrate and nitrite level is 10 parts per million.

Treat well water with anion exchange, distillation, electrodialysis or reverse osmosis processes. Contact a water treatment professional to select the right treatment for your well water.” [1] Blakeslee, Karen. Using Well Water in Canning. 13 September 2017. Accessed September 2017 at https://enewsletters.k-state.edu/youaskedit/2017/09/13/using-well-water-in-canning/

Hard water and home canning

Hard water and home canning

Hard water can cause two issues in canning, though neither of them is a safety issue, thankfully.
Vinegar in canning water

Vinegar in canning water

Adding vinegar to your processing water can prevent discoloration of the insides of your canners, and your canning jars going cloudy.
Why some canning directions call for fresh water

Why some canning directions call for fresh water

Many pressure canning instructions for vegetables call for fresh water to be added to the canning jars, instead of using the water that the vegetables were blanched in. Why is this?

References[+]

References
↑1  Blakeslee, Karen. Using Well Water in Canning. 13 September 2017. Accessed September 2017 at https://enewsletters.k-state.edu/youaskedit/2017/09/13/using-well-water-in-canning/

Reader Interactions

Comments

  1. Mary

    September 19, 2018 at 5:25 pm

    They are currently treating our water in our village with extra chlorine as there was a positive test. I am wondering if this extra chlorine will effect my canning. I am canning beets today and carrots as well.

    Reply
    • Healthy Canning

      September 11, 2019 at 5:56 pm

      It will not affect your canning.

      Reply
If you need FAST or relatively immediate canning help or answers, please try one of these Master Food Preserver groups; they are more qualified than we are and have many hands to help you. Many of them even operate telephone hotlines in season.

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