DPD Free Chlorine Reagent Powder Pillows, 10 mL, Pack of 100, Range from 0.02-2.00 mg/L Cl₂, USEPA Accepted Method 8021, Drinking Water and Wastewater Analysis, for Use with Colorimeter, 2105569

worked as the should , Hach has been around the water works industry for many years , of course their stuff is reliable

Works Great for what we used it for !

I have to use these every day to check the chlorine for our neighborhood water system. It’s a much better price than buying them through our well contractor.

These have worked fine and have had no issues with them.

The packets are what we need to tell the chlorine levels in our drinking water with in our community well

GREAT

Hach dpd free chlorine testing pillow are well packaged and easy to use. Have long use periods before expiration but be sure to check the expiration date when you first get the package. Manufactured by Hach but sold by many people.

Good. Fresh

😊👍