Ultraviolet Energy Levels
Required for 99.9% Destruction of Microorganisms


Levels are measured in microwatts at wavelength of 254 nanometers. Pura UV Systems provide greater than 16,000 microwatts of UV energy.

Bacteria
Agrobacterium tumefaciens 8500 Salmonella paratyphi (Enteric fever) 6100
Bacillus anthraci 8700 Salmonella typhimurium 15200
Bacillus megaterium (vegetative) 2500 Salmonella typhosa (Thyphoid fever) 6000
Bacillus subtilis (vegetative) 11000 Sarcina lutea 26400
Clostridium tetani 22000 Serratia marcescens 6200
Corynebacterium diphtheriae 6500 Shigella dysenteriae (Dysentery) 4200
Escherichia coli 7000 Shigella flexneri (Dysentery) 3400
Legionella bozemanii 3500 Shigella sonnei 7000
Legionella dumoffii 5500 Staphylococcus opidermidis 5800
Legionella gormanii 4900 Staphylococcuc aureus 7000
Legionella micdadei 3100 Streptococcus faecalis 10000
Legionella longbeachae 2900 Streptococcus hemolyticus 5500
Legionella pneumophila (Legionnaires disease) 3800 Streptococcus lactis 8000
Leptospira interrogans (Infectious Jaundice) 6000 Viridans streptococci 3800
Mycobacterium tuberculosis 10000 Vibrio cholerae (Cholera) 6500
Neisseria catarrhalis 8500
Proteus vulgaris 6600
Pseudomonas aeruginosa (laboratory strain) 3900
Pseudomonas aeruginosa (environmental strain) 10500
Rhodospirilium rubrum 6200
Salmonella enteritidis 7600
Mold Spores
Mucor ramosissimus (white gray) 35200
Penicillum expensum 22000
Penicillum roqueforti (green) 26400
Algae
Chlorella vulgaris 22000
Viruses
Bacteriophage (E. coli.) 6600
Hepatitis virus 8000
Influenza virus 6600
Poliovirus 21000
Rotavirus 24000
Yeast
Baker's yeast 8800
Brewer's yeast 6600
Common yeast cake 13200
Saccharomyces var. ellipsoideus 13200
Saccharomyces sp 17600
Cysts
Giardia Lamblia < 10000
Chryptosporidium < 10000
* Recent research has shown that these cysts can be inactivated with 5000-10000. A tight carbon block filter will also remove these cysts.

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