0-10ppm Residual Chlorine

SKU: 33815-10

$21.95USD or lower Each

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Quantity1+2+ 3+ 10+ 100+ 
Price for each$21.95USD$21.45USD$20.95USD$19.95USD$17.95USD
Your savings - 2.28%4.56%9.11%18.22%
[4]   1 Reviews    | Write a Review

Buy Indigo™ residual chlorine chlorine test strips for only $21.95 /100 strips; buy more & and save with our extended shelf life. Measure free (available) chlorine levels 0 & 10ppm in drinking water or for organic food certification.

Confused about how to dilute? Use our free Chlorine Bleach Dilution Calculator to take out the guesswork.

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


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 within 15 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 measurable limits.

Results in 30 seconds with readings at 0.5-1-3-5-10 ppm for free (available) chlorine bleach concentration.

  • 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
Reviews (1)
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
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