Recently post we provided links to three different bacteria in water test kits in the same blog entry and since then we have received a number of emails asking us to please explain the differences between them.

We will begin by re-posting the links to the three kits:

Test Products: Test Kit for Coliform Bacteria
Test Kit for Coliform Bacteria

Filter Water: Bacteria in Water Test Kit
Bacteria in Water Test Kit

Filter Water: Bacteria in Water Test Kit
Bacteria in Water Test Kit

  • The first bacteria test kit does the most complete testing for potentially harmful bacteria in drinking water. It can provide presence/absence test results in 24 hours for coliform bacteria down to 1 cfu per 100 milliliters, the current low detection limit enforced by the United States Environmental Protection Agency.

    Additionally, use of a light source with a wavelength of approximately 365nm on the sample after the passing of 24 to 48 hours will let you know if you have E. Coli present in your test sample. The ability to provides presence/absence results for E. Coli. results in this test kit having the highest cost.

    Sold in cases of 12 and manufactured by SenSafe.

  • The second bacteria test kit provides presence/absence test results in 48 hours for coliform bacteria down to 1 cfu per 100 milliliters, the current low detection limit enforced by the United States Environmental Protection Agency. It does not provide information on the presence or absence of E. Coli. in a water sample.

    Sold as individual tests and manufactured by WaterSafe.

  • The third bacteria test kit performs the same task as the second test kit, providing presence/absence test results in 48 hours for coliform bacteria down to 1 cfu per 100 milliliters, and comes packaged in cases of twelve or as individual tests.

    The kit’s manufacturer, SenSafe, claims that Bacteria Check “follows the APHA, Standard Methods, 20th Edition, 9221 D, screen test for total coliform in potable water”.

No matter which test kit you decide upon, always remember that only a water analysis performed by a certified water testing lab such as National Testing Laboratories can give you a definitive answer regarding the safety of your drinking water.

You should use At Home and Do It Yourself Water Test Kits from WaterSafe and SenSafe should serve as screening tools only.


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