APPENDIX B 

 APPROVED ANTI-MOSQUITO ORDINANCE 



The following ordinance, prepared in connection with the joint, coop- 

 erative anti-malaria demonstration work of the U. S. Public Health 

 Service and the International Health Board, has been adopted by a large 

 number of cities, towns and villages in various parts of the United States, 

 and has proven uniformly satisfactory: 



ORDINANCE FOR THE PREVENTION OF MOSQUITO BREEDING 



IN THE 



Section 1— It shall be unlawful to have, keep, maintain, cause or permit, 



within the (incorporated) limits of 



any collection of standing or flowing water in which mosquitoes breed or are 

 likely to breed, unless such collection of water is treated so as effectually to 

 prevent such breeding. 



Section 2.— Any collections of water considered by Section 1 of this 

 ordinance shall be held to be those contained in ditches, pools, ponds, 

 excavations, holes, depressions, open cess-pools, privy vaults, fountains, 

 cisterns, tanks, shallow wells, barrels, troughs (except horse troughs in 

 frequent use), urns, cans, boxes, bottles, tubs, buckets, defective house roof 

 gutters, tanks of flush closets or other similar water containers. 



Section 3.— The method of treatment of any collections of water, that are 

 specified in Section 2, directed toward the prevention of breeding of mos- 

 quitoes, shall be approved by the accredited health officer, and may be any 

 one or more of the following: 



(a) Screening with wire netting of at least 16 meshes to the inch each 

 way or with any other material which will effectually prevent the ingress 

 or egress of mosquitoes. 



(b) Complete emptying every seven (7) days of unscreened containers, 

 together with their thorough drying or cleaning. 



(c) Using a larvicide approved and applied under the direction of the 

 health officer. 



(d) Covering completely the surface of the water with kerosene, petroleum 

 or paraffin oil once every seven (7) days. 



(e) Cleaning and keeping sufficiently free of vegetable growth and other 

 obstructions, and stocking with mosquito-destroying fish. 



(J) Filling or draining to the satisfaction of the health officer. 



(<7) Proper disposal, by removal or destruction, of tin cans, tin boxes, 

 broken or empty bottles and similar articles likely to hold water. 



Section 4.— The natural presence of mosquito larvae in standing or running 

 water shall be evidence that mosquitoes are breeding there, and failure to 



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