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How Many Microns Should My Water Filter Be?

June 11, 2021 3 min read

How Many Microns Should My Water Filter Be

We always hear about how important water filtering is important. If you’ve noticed, water filters have micron ratings on their description. But we often ask ourselves, what are microns and how many microns should my water filter be? In this article, we’ll talk all about microns and their role in keeping your water healthy and safe.

You won’t have to worry about unseen chemicals, germs, or other toxins getting into your body if you have a good whole home water filter. However, you must verify that the micron level of your entire house water filter system is appropriate. This is to ensure that even the tiniest particles are filtered out.

twin filter system with plastic and crystal case


A micron is a measuring unit and best explained as one-millionth of a meter or one-thousandth of a millimeter. It’s a very small measurement that’s difficult to comprehend. This tiny measurement may be complicated. But it’s critical to understand the micron rating since it determines how filters work at the microscopic level.

It rates how effectively a filter removes dirt, trash, and other particles from water with the help of micron filters. A filter cartridge’s pore size uses microns as a measurement. Experts say that the finer the eliminated particles, the lower the micron rating/classification. The smallest particle’s size that needs filtering from your water determines which micron filter you require.


There are different micron classes you can see in water filters. Usually, the rating is based on the micron size as well.

  • I: 0.5 to less than 1 micron
  • II: 1 to less than 5 microns
  • III: 5 to less than 15 microns
  • IV: 15 to less than 30 microns
  • V: 30 to less than 50 microns
  • VI: greater than 50 microns

Activated charcoal and reverse osmosis filters will have micron filter sizes linked to them.

Households commonly use filters with a micron size of one or fewer and portable water filters for alternative water collection systems. It removes parasites, as well as the majority of germs from the water by one-micron filters.

Bacteria typically range in size from 0.4 to 2 microns. Because 0.4-micron bacteria will pass through a 1-micron filter, you should choose a filter size of 0.4 microns or lower. It will ensure that you are removing all of the germs feasible. It’s usually more expensive, but for particular water supplies, it may be worthwhile.


microns work

Whole-house filters often use a multi-step procedure to remove impurities of all micron sizes from your water, such as bacteria, sediments, and silt.

  1. It helps in the pre-filter process as it helps reduce bigger particles, pollutants, and pollutants common in tap water.
  2. When filtering in the main filter, microns help remove the chlorine and chloramines, damaging your hair and skin.

At every stage of the process, micron levels are crucial. We wouldn’t know how to appropriately eliminate particles that we can’t see without a microscope if we didn’t have this unit of measurement.

How Many Microns Should My Water Filter Be?

Your location and water source determine the best micron filter for you. If you’re residing in a heavily polluted city, expect extremely tiny dirt. A 1-micron or smaller filter may require to collect all of the microscopic particles. Keep in mind that each water supply in a particular area is different.


The more impurities a filter can trap and cleanse from your water, the lower the micron level it has. When trying to buy a water filter, make sure to pay special attention to the micron level. A decent water filter with a low micron level will cost a little more than one with a greater micron level, but it is well worth it.

If you still find yourself asking, “how many microns should my water filter be?” you can request a professional for further assistance.