Waterborne Pathogen Sizing Chart See our comparison of common waterborne pathogens sizes, as well as which type of filtration solutions are needed. Download Waterborne Pathogen Sizing Chart (PDF) Waterborne Pathogen Particle Sizes – Length and Width Particle Length Width Pseudomonas: 1 – 5 µm 0.5 – 1.0 µm Stenotrophomonas maltophilia: 0.7 – 1.8 μm 0.4 – 0.7 μm Micrococcus: 0.5 – 2.0 μm diameter Mycobacteria: 1.0 – 10 μm 0.2 – 0.6 μm Legionella: 2 µm 0.3 – 0.9 µm Giardia: 10 – 15 µm 7 – 10 µm Cryptosporidium: 4 – 5 µm Sphingomonas: 0.5 – 3 μm 0.2–0.5 μm Parvovirus B19: 20 nm diameter Norovirus: 28 – 35 nm diameter Legionella Control Systems and Water Management Plans Contact Legionella Control Systems at [email protected] or 317-620-8498 for solutions as well as Legionella testing, risk assessments and remediation nationally. Our experienced engineers are ready to help. Request Proposal Contact Us