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Thread: how does contamination occur?

  1. #1
    DIY Member rbig's Avatar
    Join Date
    Jan 2008

    Default how does contamination occur?

    We just a place out on a river. Our well is 600'. The guys around us casually say "well, if the river floods ( a foot or so occasionally), call the well people and they'll come out and treat.

    From reading a lot, I see it's probably bleach that's used.

    What I don't understand is how/why the wells get contaminated.

    Ours is nicely sealed on top, and has plumbing that keeps water in and other things out. If we have a foot or so of water on top, how does this contaminate the well???? Does it flow down on outside of the casing?

    I know nothing about wells, and am just curious what's going on, and why.

  2. #2
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Land of Cheese


    Anytime there are openings for pipes or wires to go into the well casing, there is the potential for contamination. In the flood-prone areas the top of the well casing should be extended to a level higher than the likelyhood of floodwaters.

    On some low-laying properties near the river here, the tops of the well casings are 6-8 feet above grade.

  3. #3
    In the Trades Texas Wellman's Avatar
    Join Date
    Feb 2010
    SE Texas-Coastal


    If it's a 4" well it's vented....only 2" wells and such with packer jets are under pressure and won't be affected when they become submerged.

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