By comparing the time it takes for the leaves to fall back down in the presence of known sources of radiation. I do not have a radiation standard, but there are a few radioactive materials around here to experiment with. Thoriated TIG rods, thorium mantles, americium smoke detectors, uranium pottery pigment, tritium watch hand paint, granite (weakly above background), radon (by proxy via fan filter) etc.How can you tell if the radiation detector works?
I believe that would be a safe assumption. Algae will not grow if it is kept dark and bacteria might be filtered out depending on the soil type. We have solid clay here so what filters through it is very clean. We also have 3 tapped artesian springs within a few miles and dozens more locally waiting for a pipe to be pounded in. This area will not go thirsty in my foreseeable lifetime.That Chinese seep well was particularly interesting MNwr786. I have a relative who has lived Northern Idaho. There are so many streams and rivers and lakes there which might make this sort of thing practical on a long term basis. If the sides could be lined with stones and it was a stream perhaps bacteria, algae and so forth would not be a problem.
I see.My grandparents did exactly this in Oklahoma. They also heated with a wood burning stove. They collected rain water, pumped it up to a cistern with a windmill pump and lived happily ever after.
The problem for me is I live in California. This year it is a desert. My grandparents used their roof as a collection area but I would have to use much, much more surface area which I don't have.
The Lifestraw thing is a little too small for me. I have to purify water for the dogs too. Also, this is going to take a trip to the river or lake in a SHTF and it would be nice to carry back a supply. The Berkey filter would work better for me because I could carry gallon bottles, fill them up with water at the source, and purify it at home.
This does solve the problem of carrying water back to your camp or place of residence. In a SHTF world municipal water systems might not even flow and you may have to hike to a water source and carry the water back. Evidently, this system will let you filter the water while you are carrying it back.Got two filters for the moment, it's enough to support myself or proably an smaller group:
Katadyn BeFree Gravity 10L -
it was called Katadyn Camp before (which i have)
In my backpack i'm having this one:
Katadyn Combi is an all-around filter, suitable for extremely dirty water and small groups up to 3 people. Effective against microorganisms, reduces chemicals and improves the taste of the drinking water.www.katadyngroup.com
California has no standing whatsoever to regulate US Postal Laws. If that is their excuse, it is totally bogus. I am done with them.I heard it was because they didn't pay the California tax for that sticker that warns everyone not for use by pregnant women, yada yada.
Have someone from another state buy it for you and mail it.
California has retarded laws.
I love the gun cases that say, Not Legal in California. I suspect it's because of the magazine.