Turbidity testing, Omicron 10 (Brooklyn NY)

What's the true impact of Omicron 10 on tap water?

It’s easy to fix on the micron rating of a filter:

10 is smaller than 25, 1 is smaller than 5, 0.2 is smaller than 0.5.

True enough: Smaller is finer, more particles are removed. 

In an actual application, the real value of finer screen perforation size is best measured by Turbidity, an optical reading of water transparency expressed in Nephelometric Turbidity Units (NTU).  The lower the NTU number, the smaller the degree of light refraction through the sample water, meaning the clearer the water is.

This is what building residents really care about.  What matters is what the water looks like, not relative particle size.  Increasing the actual transparency of water is the ultimate goal of fine particle filtration.

Let’s look at an Omicron 10 installation at a high-rise residential property in Brooklyn NY.  The impact of Omicron 10 on the building's domestic water is dramatic.

We use a real-time Turbidity meter to measure filter performance in the field.  Collect a sample, insert the small collection bottle into the reader, and read the result. These are actual readings, so expect variance sample by sample.

Here are the readings for incoming, unfiltered Brooklyn water.  First, the highest NTU reading we found on the afternoon of Oct. 18, 2018, with incoming water (before filtration) presenting 0.75 NTU Turbidity:

Next the lowest NTU reading we found on the afternoon of Oct. 18, 2018, with incoming water (before filtration) presenting 0.66 NTU Turbidity:

Incoming average of 0.75 and 0.66: 0.705 NTU.

Now let's look at the highest and lowest NTU readings for filtered water at the output of Omicron 10, same afternoon of October 18, 2018:

Highest filtered water NTU reading:

Lowest filtered water NTU reading:

Outgoing (filtered) average of 0.15 and 0.12: 0.135 NTU.

What's the upshot?  Turbidity reduction from average 0.705 NTU to 0.135 NTU = >80% reduction after filtration by Omicron 10.

That’s the bottom line.  When you install Omicron 10, you produce a level of water transparency that New Yorkers have probably never seen in their tap water.

More about NYC water conditions and the value of Omicron 10.

Note:  We were curious also to read the NTU of the backflush water, which we expected to be much dirtier as it contained aggregated particles collected on the filter screen.  And so it was: 1.41 NTU.