Water inundating the ground zero construction site

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These wells usually have large openings and casings that often are not well-sealed.

Testing for all individual pathogens is impractical and expensive.There is no requirement to have private water wells, springs or other sources tested, it is up to the individual homeowner.For Public water supplies, frequency of testing depends on the size of the population served.Shallow wells and wells that do not have water-tight casings can be contaminated by bacteria infiltrating with the water through the soil near the well, especially in coarse-textured soils.Older water systems, especially, dug wells, spring-fed systems and cistern-type systems are most vulnerable to bacterial contamination.

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