Water Testing

Lab and Site Testing Instructions

Laboratory testing to measure the copper and silver ion levels is a significant piece of the water treatment process.

This data provides crucial information to all responsible parties. 

Monitoring the copper and silver ion levels also helps to verify that the ion levels are neither too high nor too low.

Testing Frequency:

Routine Testing - if levels of Legionella are controlled or there are no known or suspected cases of Legionellosis

Reactive Testing - if levels of Legionella are undesirable or if there are suspected or known cases

CuAg Lab Testing

Routine Frequency: Monthly

Reactive Frequency: Weekly


  1. Turn on the hot water to the fixture.
  2. Wait until the water is hot and continue running the fixture for an additional 30 seconds.
  3. Fill a 250mL sample bottle (provided by Enrich) to the top.Use one bottle per sample.
  4. Mark the outside of the bottles with the Date, Location, and System Identifier.
  5. Tighten the cap!
  6. Ship to EPI using provided boxes and prepaid envelopes.

Site Testing

Routine Frequency: Weekly

Reactive Frequency: Twice Weekly


Follow steps 1-4 for lab sampling.

Prep the Samples:

  1. Unscrew the covers from two of the glass bottles housed in the copper test kit carrying case.
  2. Rinse the insides of the glass bottles.
  3. Fill the bottles to the 10 ml marked line with the water from one of the lab sample bottles and set them aside.
  4. Pour the entire contents of one foil reagent packet into only one of the glass bottles.
  5. Screw on the covers to the glass bottles tightly.
  6. Invert the glass bottle with reagent several times and set aside for approximately 3 minutes (make sure not to mix up the two glass bottles).
  7. Wipe the exterior of the bottle that does not contain the reagent using a non-abrasive cloth.

Using the Colorimeter:

  1. Remove the digital colorimeter.
  2. Place the glass bottle that does not contain the reagent sample holder within the test kit. Make sure the triangle on the bottle aligns with the triangle on the test kit.
  3. Turn the power on to the digital test kit.
  4. Place the test kit on a level surface.
  5. Press the “Zero/Test” button and wait for the display to read zero.
  6. Remove the glass bottle from the test kit and set it aside.
  7. Remove water from the exterior of the bottle using a non-abrasive cloth.
  8. Place the second glass bottle into the test kit. Align the triangles.
  9. Press the “Zero/Test” button.
  10. Record the location, temperature and result on the site copper test log record.

Repeat steps site testing steps for each sample until all of the site tests are completed.  When complete, press the power button to turn off the test kit.