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; VIQUA systems provide 30,000.
| Bacteria |
| Agrobacterium tumefaciens |
8500 |
Bacillus anthraci |
8700 |
| Bacillus megaterium (vegetative) |
2500 |
Bacillus subtilis (vegetative) |
11000 |
| Clostridium tetani |
22000 |
Corynebacterium diphtheriae |
6500 |
| Escherichia coli |
7000 |
Legionella bozemanii |
3500 |
| Legionella dumoffii |
5500 |
Legionella gormanii |
4900 |
| Legionella micdadei |
3100 |
Legionella longbeachae |
2900 |
| Legionella pneumophila (Legionnaires disease) |
3800 |
Leptospira interrogans (Infectious Jaundice) |
6000 |
| Mycobacterium tuberculosis |
10000 |
Neisseria catarrhalis |
8500 |
| Proteus vulgaris |
6600 |
Pseudomonas aeruginosa (laboratory strain) |
3900 |
| Pseudomonas aeruginosa (environmental strain) |
10500 |
Rhodospirilium rubrum |
6200 |
| Salmonella enteritidis |
7600 |
Salmonella paratyphi (Enteric fever) |
6100 |
| Salmonella typhimurium |
15200 |
Salmonella typhosa (Thyphoid fever) |
6000 |
| Sarcina lutea |
26400 |
Serratia marcescens |
6200 |
| Shigella dysenteriae (Dysentery) |
4200 |
Shigella flexneri (Dysentery) |
3400 |
| Shigella sonnei |
7000 |
Staphylococcus opidermidis |
5800 |
| Staphylococcuc aureus |
7000 |
Streptococcus faecalis |
10000 |
| Streptococcus hemolyticus |
5500 |
Streptococcus lactis |
8000 |
| Viridans streptococci |
3800 |
Vibrio cholerae (Cholera) |
6500 |
| Mold Spores |
| Mucor ramosissimus (white gray) |
35200 |
Penicillum expensum |
22000 |
| Penicillum roqueforti (green) |
26400 |
|
| Algae |
| Chlorella vulgaris |
22000 |
|
| Viruses |
| Bacteriophage |
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. |