Brita Filter Slow Performance


I kept a log to see if my Brita filter slow performance was real or just my imagination. So far I have found the results to be clear and repeatable. Every advanced filter I have used in my Brita Pitcher has clogged after 6 to 10 gallons or about 2 to 3 weeks.

If I were filtering muddy water from a stream, these results would not surprise me at all. But I am filtering water I have distilled from Fort Collins, CO tap water. The city water has a very high quality, repeatedly ranking among the best in the US. I distill the water to remove minerals, chlorine, fluoride and most everything else that might be present. The Brita Pitcher is just the final polishing step in the process to slightly improve the taste.

What goes into the Brita filter is very close to pure water. And yet, somehow, the new advanced filters clog very quickly. The old filters never clogged. They kept working for up to 4 months and close to 100 gallons when I forgot to change the filter on schedule.

Brita Filter Slow Performance Video

Have a look at this video to see the progression.

Brita Filter Slow Performance Data

While I was logging the number of gallons filtered I also recorded the time it took to filter one quart of water. As the total number of gallons filtered increases, so does the time it takes to filter a quart. When it gets up to about an hour I know that by the next day the filter will be so clogged it hardly works at all.

This graph combines results from the two filters I tested at room temperature.

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Logging Brita Filter Performance

So far I have tested two filters at room temperature and one kept in a refrigerator. There are differences, but the sample size is too small to prove anything. Are you having trouble with the advanced filter? Why not run the same experiment I did and submit your results? Together we can find out if there is really a problem with the Brita Advanced Filter design or not. Click the heading above for instructions.

Brita Filter Performance Graphs

All experimental results you choose to share will be summarized in the performance graphs. Just click the heading above to see the graphs.

Distiller Good Brita Alternative

The best way to end frustration with slow Brita Pitcher filters is to switch from filtering to distilling. A good water distiller produces pure water with virtually no contaminants. Bacteria cannot survive the distillation process and an activated carbon filter removes most chemicals that evaporate with the water.

Many brands and models are available. I have owned a Waterwise 9000 distiller for over twenty years. I bought a replacement unit a few years back when the old one finally reached the end of its life. I think it has been an outstanding health investment and I highly recommend it.

“Brita” is a registered trademark of Brita LP.


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I've been an engineer, an organic granola entrepreneur, and now a writer. I write science fiction and non-fiction. Helioza is one of several outlets for my love of writing.

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3 comments on “Brita Filter Slow Performance

  1. Bob Oswald

    We use well water with high manganese content. With the old filters we would get probably 50 galons without significant slowing. Now, believe it or not, by the THIRD quart our filter has slowed almost to a stop. This is unacceptable, obviously.

    1. Ray Franklin

      That sounds like really terrible performance. I strongly suspect that the new filters clog quickly because of the top screen added to resolve an unimportant cosmetic issue (flecks of black activated carbon in the upper half of the pitcher). That screen is a perfect place to grow bacteria. With high minerals, it is possible the screens on your filters are clogging due to rapid mineral buildup along with the bacteria.

  2. Ernesto Cabanes

    I am experiencing the same issue and I am not happy about it.

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