12
UV DOSAGE CHART FOR 3-LOG ORGANISM INACTIVATION
Approximate ultraviolet energy levels at 254-nanometer units wavelength required
for 99.9% destruction of various microorganisms UV energy in mWs/ cm² (1mj/cm²
= 1000 mWs/cm²):
BACTERIA
MOULD SPORE
mWs/ cm²
mWs/ cm²
Agrobacterium
tumefaciens
8,500
Aspergillus flavus
(yellowish green)
99,000
Bacillus anthracis
8,700
Aspergillus
glaucus (bluish
green)
88,000
Bacillus mrgaterium
(vegetative)
2,500
Aspergillus niger
(black)
330,000
Bacillus mrgaterium
(spore)
52,000
Mucor
ramosissimus
(white gray)
35,200
Bacillus subtillis
(vegetative)
11,000
Penicillum
digitatum (olive)
88,000
Bacillus subtillis (spore)
58,000
Penicillum
expensum (olive)
22,000
Clostridium tetani
22,000
Penicillum
roqueforti (green)
26,400
Corynebacterium
diptheriae
6,500
Rhizopus nigricans
(black)
220,000
Echerichia coli
7,000
Legionella bozimanii
3,500
Legionella dumoffii
5,500
Legionella gormanii
4,900
ALGAE
Legionella micdadel
3,100
Chlorella vulgaris
(algae)
22,000
Legionella longbeachae
2,900
Legionella pneumophila
3,800
Legionella interrogans
(infectious jaundice)
6,000
Mycobacterium
tuberculosis
10,000
PROTOZOA
Neisseria catarrhaiis
8,500
Nematode eggs
92,000
Proteus vulgaris
6,600
Paramecium
200,000
Pseudomonas
aeruginosa (laboratory
strain)
3,900