Residual Chlorine Test Strips 0-10ppm

SKU: 33815-10

$21.95USD or lower Each

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[4.7]   3 Reviews    | Write a Review

Buy Indigo® residual chlorine test strips to measure free (available) chlorine levels from 0 to 10ppm. Test drinking water or your organic foods. Be prepared for any health inspection or organic certification audit!

Or, if you have a need to disinfect drinking water, use these to confirm a 10ppm dilution.

Customer Reviews on Google

"The quick and prompt service on my 0-10 ppm chlorine test strips is much appreciated...quality at a cost less than Amazon. Read the full review from Helen K

Buy Indigo® test strips, the brand you can trust for accuracy & technical support. Call us toll free for prompt assistance or e-mail us: 1 hour response during business hours, M-F EST.


Buy Indigo® residual test strips for drinking water or organic food preparation equipment to determine residual free chlorine levels. They are ideal for anyone who is concerned about detecting trace (residual) levels of free chlorine to meet USDA or California organic certification regulations

The strips are very easy to use. Simply place a drop of water on the indicator pad of the test strip and then firmly press it against the food handling equipment, tables or skin of the fruit and vegetables themselves. If there is chlorine present, the strip will change color & can be compared to the color chart after 30 seconds.

You can also test for chlorine in drinking water if you have concerns about this. We have tried it on the water in our area & the chlorine is below the measurable limit of the strip.

Related information or images
Results in 30 seconds with readings at 0.5-1-3-5-10 ppm for free (available) chlorine bleach concentration. The detection limit of this strip is 0.25 ppm.
  • Indigo® test strips have a guaranteed minimum 3 year shelf life but are stored in desiccant lined vials so actual shelf life can be 5+ years.
  • For technical explanation, read: Sanitizer Test Strip Expiration; Good Today, Dead Tomorrow?
  • These strips measure free (available) chlorine
  • The number of strips (100) per vial is approximate.

Test Strip Documentation

Stability Statement Certificate of Analysis SDS
Indigo Chlorine 0-10ppm Test Strip Stability Statement
Indigo Chlorine 0-10ppm Test Strip Certificate of Analysis Indigo Chlorine 0-10ppm Test Strip SDS

Indigo® brand chlorine test strips are Made in USA & tested for accuracy using NIST compliant standards.

Reviews (3)

Second time ordering this product. Very satisfied with test strip quality. Fast shipping is available and very convenient.

— Food Safety Team
— Indigo:

Glad we could help.


I ordered several of your test strips. They came promptly and were what I ordered. I have used a few of the strips and they seem to work OK.

— Andy
— Indigo:

Glad we would help with your residual level testing. Thank you for review.


I personally have not used the test strips. I buy for purchase order request. I'm a buyer. But upon reading about them they sound great! Thank you, Rueben

— Rueben
— Indigo:

We appreciate your taking the time do a review.

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