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  1. #1
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    Drinkable Water From Lake

    I have a summer use cabin on a lake in N Minnesota. I'll be installing a pump system this summer for running water for dishwashing and showers. We have used lake water hauled by pail for decades with no issues. I would like to have a potable supply for cooking and drinking (the wife says if it doesn't taste good, she won't drink it), as well as a supply suitable for washing clothes in an automatic washing machine.

    The pump supply will be a Red Lion 3/4 HP shallow well pump with a 33 gallon pressure tank.

    The lake water is an amber color (i've been told from the tannins from the cedar tress, as well as the iron rich rocks of the area). Here's a report on the water quality: http://www.pca.state.mn.us/water/clm...lakeid=69-0378

    Usage of the system will be approx three 3-4 day weekends per month from May thru October. The system will need to be drained for the winter and may have stretches of no usage up to 6 weeks during the summer. I have the skills to install the system myself. I would like to have minimum maintenance.

    The wife is worried about gas/oil/chemicals in the lake. I told her we've been washing dishes in it for years (and actually used to cook with it) with surface drawn water, but since we'll be drawing from the bottom of the lake, that problem will go away (since these float).

    So what would the best way to appoach this? RO/Charcoal/Chlorine? Or is it as easy as this? http://www.cottagewatersupply.com/filtration.htm

    Thanks,

    Eric

  2. #2
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    Probably your first step, get an independent water test for potability. You could request additional specifics to address your pollution concerns, although they should show up in the potability test, just not specified.
    Gary Slusser can help with the treatment issues, they usually aren't as simple as they seem.

  3. #3
    Pump guy speedbump's Avatar
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    They certainly aren't as simple as that twin tank so called "Whole house filter thingie".

    Stick with real filtration. Not those little 10" cartridge filters. They are totally useless.

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  4. #4
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    Okay, I'll get the water tested as a baseline and go from there.

  5. #5
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    Those good folks at Cottage Water should be telling their potential customer that UV can not be used unless the water meets the UV manufacturers' minimum pretreatment requirements, like no more than 5-7 gpg of hardness, X ppm of iron, etc. etc..

    Also, carbon can not be used on water of unknown microbiological content, meaning no bacteria. Bacteria loves to live in carbon where they can get all the food they can eat.

    Post the water test results. You need hardness, pH, iron and tannins at least.

    Gary
    Quality Water Associates
    www.qualitywaterassociates.com
    Softener Forum

  6. #6
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    Will do, I figured it wouldn't be that easy. I'm not going to be up there for a few weeks, so we're looking a month out before I get results. Thanks for your input guys!!

  7. #7
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    Okay, getting the test kit this week.Tried going through the university extension service and made the mistake of telling them what I'm doing. "You can't do that, it's illegal". So called anothe lab with my "old very shallow well right next to the lake, and I'm sure it's leaking into the well". They said test for coliform bacteria, nitrates and arsenic. So add iron, tannins and hardness. Are there home tests I can do for those? Any other parameters I need to test as a baseline?

    What I'm thinking of doing is treat water for dishwashing and laundry, then get something lie a seagull for the drinking cooking water as well. Any comments?

  8. #8
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    quote:Originally posted by MnToyGuy

    Okay, getting the test kit this week.Tried going through the university extension service and made the mistake of telling them what I'm doing. "You can't do that, it's illegal". So called anothe lab with my "old very shallow well right next to the lake, and I'm sure it's leaking into the well". They said test for coliform bacteria, nitrates and arsenic. So add iron, tannins and hardness. Are there home tests I can do for those? Any other parameters I need to test as a baseline?

    What I'm thinking of doing is treat water for dishwashing and laundry, then get something lie a seagull for the drinking cooking water as well. Any comments?
    Yes, it is illegal for a reason. You are just fooling yourself.

  9. #9
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    So people camping with water filters for the same purpose are breaking the law? I just want to do the same thing on a larger scale.

  10. #10
    Pump guy speedbump's Avatar
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    To be honest with you, lake water probably isn't too healthy to be drinking. Most people don't know it, but by bathing in water puts more pollution into your blood stream than drinking the same water.

    I wouldn't look for any one filter fix alls on the internet or anywhere else for that matter. If you want the water to be bacteria free (not counting a few that chlorine won't kill) you should inject chlorine into a retention tank with a Feed Pump then once you know what kind of other contaminants you have, filter accordingly. None of these off the shelf filters will do you any good at all.

    Why don't you knock down an 1-1/4" well. That would be ten times safer than lake water.

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