Skip directly to local search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options
CDC Home

Pool & Spa (Hot Tub) Test Strips Home Test Instructions

Reminder - please follow all manufacturer recommendations when utilizing and storing test strips for pool or spa chlorine testing. Be sure to check the expiration date on the packaging before you buy them.

Testing the strips at home before visiting the pool can help you learn how to properly use and read them.

In order to test at home, you will need:

  • 3 containers
  • 13 cups of regular tap water
  • 3 drops of liquid chlorine bleach *please note that if bleach is more than 3 months old, it may be too old to provide an accurate test

Allow tap to run for about 2 minutes

  • Fill container 1 with 1 cup of water
  • Fill containers 2 and 3 with 6 cups of water each
  • Add 1 drop of liquid chlorine bleach to container 2
  • Add 2 drops of liquid chlorine bleach to container 3
  • Test each container of water utilizing the strips and the manufacturer's instructions
  • Read test strips and compare to chart below

Chart for Using Free Chlorine Test Strips at Home
Amounts and Readings Container 1 Container 2 Container 3
Amount of Tap Water At least 1 cup At least 6 cups At least 6 cups
Amount of Bleach to Add None 1 drop 2 drops
Amount of Free Chlorine Predicted 0 to <1 ppm 2-3 ppm 4-5 ppm
Your Average Reading      
 
Contact Us:
  • Centers for Disease Control and Prevention
    1600 Clifton Rd
    Atlanta, GA 30333
  • 800-CDC-INFO
    (800-232-4636)
    TTY: (888) 232-6348
  • Contact CDC–INFO
USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO
A-Z Index
  1. A
  2. B
  3. C
  4. D
  5. E
  6. F
  7. G
  8. H
  9. I
  10. J
  11. K
  12. L
  13. M
  14. N
  15. O
  16. P
  17. Q
  18. R
  19. S
  20. T
  21. U
  22. V
  23. W
  24. X
  25. Y
  26. Z
  27. #