5PK Rapid Heavy Metal Water Lead Test Strips Drinking Well Dip and Read PPM Kit Results in 41 Seconds!!! Tells The Lead Levels in PPMs

Used these for my child's science project and they worked very well.

5PK Rapid Heavy Metal Water Lead Test Strips Drinking Well Dip and Read PPM Kit Results in 41 Seconds!!! Tells the lead levels in PPMs This product tests lead in ppm (parts per million) which is clearly stated on the box and the product description, so the seller isn't dissembling. The problem with this however is that lead is to be tested in ppb (parts per billion), and the safe limit for drinking water is 15 ppb. Hence using this test to find out whether my drinking water is safe or not was meaningless. This test classified raw water from the lake as uncontaminated by lead since its threshold is so low.

Hard to tell color difference between 0 & 20. Used three strips, yet could not tell color difference between 0 & 20 on any of them My kids could not tell the difference either, so that rules out that it is not just because I am old.

Easy to use. Used to test our well water!