UV Dosages for 99.9% Inactivation

(corroborated by a number of different sources – see end of table for references).

Bacteria

UV Dose

Bacteria

UV Dose

Agrobacterium lumefaciens 5

8.5

Pseudomonas aeruginosa (Environ.Strain) 1,2,3,4,5,9

10.5

Bacillus anthracis 1,4,5,7,9 (anthrax veg.)

8.7

Pseudomonas aeruginosa (Lab. Strain) 5,7

3.9

Bacillus anthracis Spores (anthrax spores)

46.2

Pseudomonas fluorescens 4,9

6.6

Bacillus megatherium Sp. (veg) 4,5,9

2.5

Rhodospirillum rubrum 5

6.2

Bacillus megatherium Sp. (spores) 4,9

5.2

Salmonella enteritidis 3,4,5,9

7.6

Bacillus paratyphosus 4,9

6.1

Salmonella paratyphi (Enteric Fever) 5,7

6.1

Bacillus subtilis 3,4,5,6,9

11.0

Salmonella Species 4,7,9

15.2

Bacillus subtilis Spores 2,3,4,6,9

22.0

Salmonella typhimurium 4,5,9

15.2

Clostridium tetani

23.1

Salmonella typhi (Typhoid Fever) 7

7.0

Clostridium botulinum

11.2

Salmonella

10.5

Corynebacterium diphtheriae 1,4,5,7,8,9

6.5

Sarcina lutea 1,4,5,6,9

26.4

Dysentery bacilli 3,4,7,9

4.2

Serratia marcescens 1,4,6,9

6.16

Eberthella typhosa 1,4,9

4.1

Shigella dysenteriae - Dysentery 1,5,7,9

4.2

Escherichia coli 1,2,3,4,9

6.6

Shigella flexneri - Dysentery 5,7

3.4

Legionella bozemanii 5

3.5

Shigella paradysenteriae 4,9

3.4

Legionella gormanil 5

4.9

Spirillum rubrum 1,4,6,9

6.16

Legionella micdadei 5

3.1

Staphylococcus albus 1,6,9

5.72

Legionella longbeachae 5

2.9

Staphylococcus aureus 3,4,6,9

6.6

Legionella pneumophila (Legionnaire's Disease)

12.3

Staphylococcus epidermidis 5,7

5.8

Leptospira canicola-Infectious Jaundice 1,9

6.0

Streptococcus faecaila 5,7,8

10.0

Leptospira interrogans 1,5,9

6.0

Streptococcus hemolyticus 1,3,4,5,6,9

5.5

Listeria monocytogenes

12.0

Streptococcus lactis 1,3,4,5,6

8.8

Micrococcus candidus 4,9

12.3

Streptococcus pyrogenes

4.2

Micrococcus sphaeroides 1,4,6,9

15.4

Streptococcus salivarius

4.2

Mycobacterium tuberculosis 1,3,4,5,7,8,9

10.0

Streptococcus viridans 3,4,5,9

3.8

Neisseria catarrhalis 1,4,5,9

8.5

Vibrio comma (Cholera) 3,7

6.5

Phytomonas tumefaciens 1,4,9

8.5

Vibrio cholerae 1,5,8,9

6.5

Proteus vulgaris 1,4,5,9

6.6

Moulds

UV Dose

Moulds

UV Dose

Aspergillus amstelodami

77.0

Oospora lactis 1,3,4,6,9

11.0

Aspergillus flavus 1,4,5,6,9

99.0

Penicillium chrysogenum

56.0

Aspergillus glaucus 4,5,6,9

88.0

Penicillium digitatum 4,5,6,9

88.0

Aspergillus niger (breed mould) 2,3,4,5,6,9

330.0

Penicillium expansum 1,4,5,6,9

22.0

Mucor mucedo

77.0

Penicillium roqueforti 1,2,3,4,5,6

26.4

Mucor racemosus (A & B) 1,3,4,6,9

35.2

Rhizopus nigricans (cheese mould) 3,4,5,6,9

220.0

Protozoa

UV Dose

Protozoa

UV Dose

Cryptosporidium parvum

< 10.0

Giardia lamblia

< 20.0

Chlorella vulgaris (algae) 1,2,3,4,5,9

22.0

Nematode Eggs 6

40.0

Blue-green Algae

420.0

Paramecium 1,2,3,4,5,6,9

200.0

E. hystolytica

84.0

Virus

UV Dose

Virus

UV Dose

Adeno Virus Type III 3

4.5

Influenza 1,2,3,4,5,7,9

6.6

Bacteriophage 1,3,4,5,6,9

6.6

Rotavirus 5

24.0

Coxsackie

6.3

Tobacco Mosaic 2,4,5,6,9

440.0

Infectious Hepatitis 1,5,7,9

8.0

0

0

Yeasts

UV Dose

Yeasts

UV Dose

Baker's Yeast 1,3,4,5,6,7,9

8.8

Saccharomyces cerevisiae 4,6,9

13.2

Brewer's Yeast 1,2,3,4,5,6,9

6.6

Saccharomyces ellipsoideus 4,5,6,9

13.2

Common Yeast Cake 1,4,5,6,9

13.2

Saccharomyces sp. 2,3,4,5,6,9

17.6

References

1. "The Use of Ultraviolet Light for Microbial Control", Ultrapure Water, April 1989.
2. William V. Collentro, "Treatment of Water with Ultraviolet Light - Part I", Ultrapure Water, July/August 1986.
3. James E. Cruver, Ph.D., "Spotlight on Ultraviolet Disinfection", Water Technology, June 1984.
4. Dr. Robert W. Legan, "Alternative Disinfection Methods-A Comparison of UV and Ozone", Industrial Water Engineering, Mar/Apr 1982. 
5. Unknown 
6. Rudolph Nagy, Research Report BL-R-6-1059-3023-1, Westinghouse Electric Corporation.
7. Myron Lupal, "UV Offers Reliable Disinfection", Water Conditioning & Purification, November 1993.
8. John Treij, “Ultraviolet Technology”, Water Conditioning & Purification, December 1995.
9. Bak Srikanth, “The Basic Benefits of Ultraviolet Technology”, Water Conditioning & Purification, December 1995