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Particle Size Chart: Removal Range by Filtration

Below is a particle size chart displaying the sizes of well-known objects and particulates, illustrated in the size of the micrometer (micron). This is a comparison chart for particle size removal of thin-film membranes used in reverse osmosis systems.

Particle Size Chart

Particle Size Chart Removal Range by Filtration
Source: 'Water Proccessing: Third Edition', Wes McGowan, Water Quality Association, 2001

Typical Removal Rates for Thin-Film Composite Membranes

At 65 PSI Feed Pressure and 77 Degrees Temperature
Arsenic 94%   Barium 99%   Fluoride 93%   Nitrates 87%   Nitrites 87%  
Asbestos 99% Cadmium 98% Lead 99% Radium 80% Hexavalent Chromium 86%
Cyanide 86% Copper 99% Mercury 91% Selenium 96% Trivalent Chromium 88%

More Information on Cartridges & Micron Sizes

How to Choose a Micron Size

A micron is a unit of measurement for how small of particles a filter will catch. The lower the micron size, the tinier the 'holes' in the filter cartridge are that allows water to pass through, ranging from 0.1 absolute to 150 microns.

Use our Pore Size Efficiency Guide to find out what micron size to use.

Replacement Cartridges Guide

Need to replace your system's cartridges but not sure what type is best for your system?

View our Cartridge Replacement Guide or contact us to find out what you need.

Installing Replacement Cartridges and Sanitizing Filter Housings

Step by step instructions on installing replacement cartridges and sanitizing filter housings. It is highly recommended that you clean and sanitize your system once a year.