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A Noncommunity Public
Water Supply (PWS), otherwise known as TYPE II water supply, is defined as
"A system that serves any nonresidential facility that provides water
for drinking or domestic purposes to 25 or more persons at least 60 days out
of the year, or has 15 or more service connections." Noncommunity (PWS) can be broken down future into two
categories.
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(1) TRANSIENT PWS is a supply that serves 25 or more different people a day at least 60 days of the year (or 15 or more service connections). Example include: |
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Motels |
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Churches |
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Restaurants |
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Parks |
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Highway Rest Areas |
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| (2) Nontransient PWS is a supply that serves the same 25 or more people at least 189 days of the year. Examples include: | ||||||||||||||||
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Schools |
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Industries |
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Day Care Centers |
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Office Buildings |
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What
is the purpose of coliform sampling?
Coliform bacteria is found in the intestinal tract of humans and many animals. It is also found in soils and in large numbers in sewage and surface waters. It is used as an indicator organism because it is associated with sewage and other sources that may also harbor disease-causing agents. Therefore, if found in drinking water, it signals a possible breach in the sanitary condition of the water supply and the potential for disease transmission. Type II public water supply owners are required under the Safe Drinking Water Act to sample for coliform bacteria on a frequency ranging from monthly to quarterly, to annually depending upon the number of people served and the results of sanitary survey (inspection) of the water system. |
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For more information visit: http://www.deq.state.mi.us or contact: |
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(989) 743-2390 |