Preparedness Notes for Saturday — August 10, 2019

On August 10th, 1984, Red Dawn, the first PG-13 rated movie, starring Patrick Swayze was released. The movie (the 1984 original, not the watered-down 2012 remake) is a favorite of both JWR and HJL. The characters embody the independent, indomitable spirit that created this country.

Today I’m posting a short follow-up article by “Tunnel Rabbit.” Because it is less than 1,500 words, this is not part of the writing contest judging.



Using a Slow Pump in a Well, by Tunnel Rabbit

This is a follow-up to my recent  SurvivalBlog article: My Solar-Powered Dankoff Slow Pump System. (See: Part 1 and Part 2.)

In the SurvivalBlog comments section, Homer asked for some details on using a Slow Pump in a Well, and he gets it.  It is good to know just how versatile the Dankoff Slow Pump is.

From the Dankoff literature: It is possible to use the Slow Pump should the well casing be at least 6 inches in diameter.   The filter and foot valve in this situation, should be the Dankoff model, a 30 inch in length filter and foot valve companion, that is attached at the end of the 20 foot inlet pipe.

This is the 30 inch filter and foot valve:


https://www.altestore.com/store/solar-water-pumps/pump-accessories/foot-valves-filters-strainers/30-filter-and-foot-valve-assembly-plus-spare-30-filter-p360/

My Recommendations

I would prime the inlet pipe, or make an accommodation to prime the pump inlet from top side with a flexible line that runs to the top, before lowering the assembly into the well.  The pump is lowered to within 10 to 15 feet, or closer as you may dare, to the static water level.  Within 10 feet, the suction side will prime itself, but the static level may change over time, and we have a built-in a method to deal with that possible change.  Raise or low the pump in the well as needed. The pump is not water proof. If it become wet and blows it’s 7 amp (24 volt), or 15amp (12 volt) ATC fuse, pull it out and dry it out.

Because the pump does its pumping slowly, it may not affect your well’s static level much, and likely not at all.

What model pump should be use?

The depth of the static water level is the bottom measure to include with increase in elevation, and where the water must be delivered.  It’s not easy to figure the actual TDH (Total Dynamic Head), so just figure the total elevation the water will be lifted, and choose the pump with next highest. and maximum elevation number on the Dankoff chart.  This insures that we’ll have a pump installed that will have enough extra capacity to make up for lack of a way to determine the actual TDH, or pressure limit.

The Dankoff Slow Pump chart:

in feet:
http://www.dankoffsolarpumps.com/pdfs/Dankoff_SlowPump.pdf

in meters:
http://www.maskamwater.com/wp-content/uploads/2018/08/Dankoff-Slowpump.pdf

If the well is 250 feet deep, and the static level is, say, 200 feet, and the point at which the water will be pumped to is 100 feet above the well casing, then we need a pump that can easily handle a height of 300 feet.
According to the chart, the 1304-24 can pump to 320 feet, but it is near it’s limit, and there is no margin for error.  The distance, or total length of the pipe in not included in the calculation, and friction in the pipe is accumulated with distance and pipe size.  So the let’s be safe and choose the next pump model lower in number, and with the higher elevation number on the chart.  That would be in this case,  the 1308-24 (400’@ 1gpm)  — (The Model 1308-12 is the one that I happen to have).

Looking at the chart, we find the PV requirement is 250 watts to lift water 400 feet with that pump.  And add 40%, if no pump controller is used = 350 watts. I’d get a bit extra, 400 watts or more. If the water is only lifted to 300 feet, the chart says the #1308 will produce at a maximum, 1.1 gpm.  If the pump is powered by the solar system that runs off batteries, reduce that number by 20%, because of the lower voltages in regulated power.

If the house is run on 12 volts DC, then the pump to get would be the #1308-12, the one I have. (is it a coincidence, no).  If supplied with 12 volts,#1308-24 (24 volt) would only produce half that of the #1308-24 rating (1.1 gpm), or about .5 gpm.  Why? If the 1308-24 is fed 12 volts, it produces half it’s rating, because half of 24 is 12.  Yet the 24 volt motor will not be harmed.  It can be used.

Because the pump is now at least 200 hundred feet below the surface we must choose the size, or gauge of wire to deliver full voltage and amperage.  So we use a voltage drop calculator on line.  

https://www.calculator.net/voltage-drop-calculator.html

We’ll need to push 8 amps with 36 volts for a nominal 24 volt pump, when run directly off the panels.  The calculator says we’ll have a 5% loss (acceptable limit) in voltage if we use 200 feet of 12awg wire.  We can use less expensive 12 awg wire. If we use the 1308-12, a 12 volt pump like mine, we need to use the harder to find, and more expensive 8 awg, or the easier to find 6 awg.  Yet the calculator show that 10 awg has  only a 6% voltage loss instead of 5%.  Close enough for the slow pump. We can also use 10awg.  If the panels are not at the well head, then we need to run the calculator again with the actual length, from the static well level to the sunniest nearby location.

If the photovoltaic panels are located far from the pump head, then the 24 volt model is probably the most practical choice.  If the distance is greater than 800 feet total, then the 48 volt pump is best. Of course the 48 volt pump can be used regardless.  Should the panels be damaged by a CME, or EMP, to supply it with alternative power via a generator, or a vehicle alternator, or regulated tread mill motor, would not be possible unless a voltage converter was used to step up from a 12 volt system to at least 24, 36, or 48 volts.  In an emergency, two 12 volt batteries could be connected in series to create 24 volts that would run the 48 volt pump at half speed.  Of course we could also find four 12 volt batteries to run it at full speed.  It is a bit cumbersome, but it could be done.

And because we are pumping using the #1308, the pressures it can create when lifting water to the maximum 400 feet, the pressure in the line could reach 175 psi.  Note that 175 psi would burst the inexpensive poly pipe rated to only 70 psi, so we need to use a High Density Polyethylene Pipe. This is a manufacturer’s part number, DR11, that handles 200 psi.:

http://www.jmeagle.com/sites/default/files/HDPESpecSheet4710%20.pdf

Or you can just go down the local pumping outfit and pick it up.  To connect this stuff, all you need is a propane touch to soften it up a bit, and hose clamps,and hack saw to cut it.

Addendum:

Some helpful references and manuals in PDF files and other formats, for the Dankoff Slow Pump:
.
http://www.dankoffsolarpumps.com/

http://dankoffsolarpumps.com/pdfs/Intro_to_SWP.pdf

http://www.dankoffsolarpumps.com/pdfs/slowpump_booster_instructs.pdf
https://www.humboldtsolarwaterpump.com/layout-diagram-for-dankoff-solar-slowpump/



Editors’ Prepping Progress

To be prepared for a crisis, every Prepper must establish goals and make long-term and short-term plans. In this column, the SurvivalBlog editors review their week’s prep activities and planned prep activities for the coming week. These range from healthcare and gear purchases to gardening, ranch improvements, bug out bag fine-tuning, and food storage. This is something akin to our Retreat Owner Profiles, but written incrementally and in detail, throughout the year. We always welcome you to share your own successes and wisdom in the Comments. Let’s keep busy and be ready!

Jim Reports:

In addition to working on my latest book manuscript and blogging, much of this week was dedicated firewood cutting, hauling, splitting, and stacking. Most of this was cutting dead-fallen western larch. (Also commonly called Tamarack.) The small diameter logs (under 6″) don’t even require splitting. Those rounds can be burned in our main woodstove “as-is.”  There was rain in the forecast starting Friday afternoon, so the whole family scrambled to get most of the small rounds stacked in our primary wood shed. The rest of the rounds were either stacked under eaves (for later splitting), or were tarped. My goal is to have our firewood basically set for winter by the end of August. Then, as is my routine in the fall, I will gradually split the large Tamarack and Red Fir rounds. And finally our kids and I will also split some short red cedar rounds, for kindling. There is still one large dead-standing White Fir that I need to deal with, but that could be delayed until next year.

Meanwhile, Lily has been very busy in the garden, as she will describe.

Continue reading“Editors’ Prepping Progress”



The Editors’ Quote of the Day:

“O Lord my God, in thee do I put my trust: save me from all them that persecute me, and deliver me:

Lest he tear my soul like a lion, rending it in pieces, while there is none to deliver.

O Lord my God, If I have done this; if there be iniquity in my hands;

If I have rewarded evil unto him that was at peace with me; (yea, I have delivered him that without cause is mine enemy:)

Let the enemy persecute my soul, and take it; yea, let him tread down my life upon the earth, and lay mine honour in the dust. Selah.

Arise, O Lord, in thine anger, lift up thyself because of the rage of mine enemies: and awake for me to the judgment that thou hast commanded.

So shall the congregation of the people compass thee about: for their sakes therefore return thou on high.

The Lord shall judge the people: judge me, O Lord, according to my righteousness, and according to mine integrity that is in me.

Oh let the wickedness of the wicked come to an end; but establish the just: for the righteous God trieth the hearts and reins.

My defence is of God, which saveth the upright in heart.

God judgeth the righteous, and God is angry with the wicked every day.

If he turn not, he will whet his sword; he hath bent his bow, and made it ready.

He hath also prepared for him the instruments of death; he ordaineth his arrows against the persecutors.

Behold, he travaileth with iniquity, and hath conceived mischief, and brought forth falsehood.

He made a pit, and digged it, and is fallen into the ditch which he made.

His mischief shall return upon his own head, and his violent dealing shall come down upon his own pate.

I will praise the Lord according to his righteousness: and will sing praise to the name of the Lord most high.” – Psalm 7 (KJV)



Preparedness Notes for Friday — August 9, 2019

An important update: We are about to be stabbed in the back by the Senate Republican leadership, with the consent of President DJT. Read this: McConnell suggests Senate could look at assault weapons ban, background checks. Please call your senators, and remind them the banning private party intrastate sales is outside of Federal jurisdiction! And they must STOP red flag pre-crime laws, and any attempts to ban our ARs or full capacity magazines.

August 9th, 1831 was the birthday of James Paris Lee (August 9, 1831 – February 24, 1904). He was a Scottish-Canadian and later American inventor and arms designer, best known for inventing the bolt action that led to the Lee-Metford and Lee-Enfield series of rifles.

SurvivalBlog Writing Contest

Today we present another entry for Round 84  of the SurvivalBlog non-fiction writing contest. The more than $12,000 worth of prizes for this round include:

First Prize:

  1. A $3,000 gift certificate towards a Sol-Ark Solar Generator from Veteran owned Portable Solar LLC. The only EMP Hardened Solar Generator System available to the public.
  2. A Gunsite Academy Three Day Course Certificate. This can be used for any one, two, or three day course (a $1,095 value),
  3. A course certificate from onPoint Tactical for the prize winner’s choice of three-day civilian courses, excluding those restricted for military or government teams. Three day onPoint courses normally cost $795,
  4. DRD Tactical is providing a 5.56 NATO QD Billet upper. These have hammer forged, chrome-lined barrels and a hard case, to go with your own AR lower. It will allow any standard AR-type rifle to have a quick change barrel. This can be assembled in less than one minute without the use of any tools. It also provides a compact carry capability in a hard case or in 3-day pack (an $1,100 value),
  5. Two cases of Mountain House freeze-dried assorted entrees in #10 cans, courtesy of Ready Made Resources (a $350 value),
  6. A $250 gift certificate good for any product from Sunflower Ammo,
  7. American Gunsmithing Institute (AGI) is providing a $300 certificate good towards any of their DVD training courses.

Second Prize:

  1. A gift certificate from Quantum Harvest LLC (up to a $2,200 value) good for 12% off the purchase of any of their sun-tracking models, and 10% off the purchase price of any of their other models.
  2. A Front Sight Lifetime Diamond Membership, providing lifetime free training at any Front Sight Nevada course, with no limit on repeating classes. This prize is courtesy of a SurvivalBlog reader who prefers to be anonymous.
  3. A Glock form factor SIRT laser training pistol and a SIRT AR-15/M4 Laser Training Bolt, courtesy of Next Level Training, which have a combined retail value of $589,
  4. A Three-Day Deluxe Emergency Kit from Emergency Essentials (a $190 value),
  5. Two 1,000-foot spools of full mil-spec U.S.-made 750 paracord (in-stock colors only) from www.TOUGHGRID.com (a $240 value).
  6. An assortment of products along with a one hour consultation on health and wellness from Pruitt’s Tree Resin (a $265 value).

Third Prize:

  1. Three sets each of made-in-USA regular and wide-mouth reusable canning lids. (This is a total of 300 lids and 600 gaskets.) This prize is courtesy of Harvest Guard (a $270 value)
  2. A Royal Berkey water filter, courtesy of Directive 21 (a $275 value),
  3. Expanded sets of both washable feminine pads and liners, donated by Naturally Cozy (a $185 retail value),
  4. Two Super Survival Pack seed collections, a $150 value, courtesy of Seed for Security, LLC,
  5. Mayflower Trading is donating a $200 gift certificate for homesteading appliances.

Round 84 ends on September 30th, so get busy writing and e-mail us your entry. Remember that there is a 1,500-word minimum, and that articles on practical “how to” skills for survival have an advantage in the judging.



Family Winter Greenhouse, by T.M.P.

We moved to the American Redoubt five years ago, from Northern California. We wanted something located away from any big cities, with some acreage, well water, a septic system, a big shop, and with wild game. While surfing the net for real estate which would be suitable for long term sustainability after a SHTF event, I found a listing of a property with a description of amenities that sounded ideal. In fact, on the way to see the property with our Realtor I commented to my wife that it really sounded too good to be true.

Included in the description was: “Five year old 2,700 s.f. well insulated, one level home situated on 80 fenced acres, adjacent to 640 acres of State land with mule deer and antelope, year around creek with 5 acre pond, a detached 36′ x 36′ shop, private well and septic system, all located in the country, two hours by car from any highly populated areas.”

As it turned out, everything was as described, much to our surprise and joy. The only thing I would have preferred was a smaller house for the two of us. We had had large homes in the past when our family was growing but now our needs were for less. Even that “excess” turned out to be a blessing as I will explain.

The shop was not insulated or sheet rocked, so that was of highest priority, as I planned to spend long, cold winters in the shop enjoying my hobby as a metal fabricator. Just prior to the work beginning I had an insulated chimney installed for a wood stove. The walls were framed with 2×4 studs providing only room for R-11 batt insulation. The insulation contractor suggested spray-on foam insulation which has a much higher R value, and so we went with that and I am very glad that we did! That stuff not only insulates but it seals everything so that no air can penetrate cracks between the studs, et cetera.Continue reading“Family Winter Greenhouse, by T.M.P.”



Economics & Investing For Preppers

Here are the latest news items and commentary on current economics news, market trends, stocks, investing opportunities, and the precious metals markets. We also cover hedges, derivatives, and obscura. And it bears mention that most of these items are from the “tangibles heavy” contrarian perspective of SurvivalBlog’s Founder and Senior Editor, JWR. Today, we look at changes in buying foreign currencies with PayPal. (See the Forex& Cryptos section.)

Precious Metals:

At Zero Hedge: Why Silver will be the “Star of the Show”

o  o  o

Gold gains sheen on renewed US-China tiff

Economy & Finance:

At Wolf Street: ECB’s NIRP-Forever Policy “Destroys Banks’ Profitability Equation”: Bankia CEO. Spanish Banks Reel. Problems Stack Up

o  o  o

Eric Peters: Is Nissan About to Go Belly Up?

o  o  o

The Myth of American Middle-Class Stagnation

Continue reading“Economics & Investing For Preppers”





Preparedness Notes for Thursday — August 8, 2019

August 8th is the birthday of Terry Nation (August 8th, 1930 – March 9th, 1997), who was a Welsh television writer and novelist. Nation wrote two series, Survivors and Blake’s 7, in the 1970s. Survivors was re-made a few years ago.

Please contact your senators and congressmen repeatedly, and tell them: No more gun laws! The RINO Republicans seem to be caving-in, on this issue. The latest attacks on our freedom are proposed Red Flag laws and Extreme Risk Protective Orders (ERPOs). These are unconstitutional proceedings that deny the right to face one’s accusers, or to attend their hearings, or even know that there was a hearing until after a court order is issued! This grossly violates Due Process.

We can also expect to see bi-partisan attempts to pass “Universal Background Checks”. This is just a polite way of saying: A ban on intrastate private party sales of used guns. This reaches far beyond the intent of the Interstate Commerce Clause. Please call and remind your senators and congressmen of the difference between the words intrastate and interstate! 

As I’ve mentioned before: Our 1st, 2nd, 4th, and 5th Amendment rights are on the line.  Please repeatedly contact you Senators and insist that they oppose any Red Flag law or any background check expansion — including both S. 42 and the Senate version of H.R.1112. (Those two background checks bills passed in the House of Representatives.)

SurvivalBlog Writing Contest

Today we present another entry for Round 84  of the SurvivalBlog non-fiction writing contest. The more than $12,000 worth of prizes for this round include:

First Prize:

  1. A $3,000 gift certificate towards a Sol-Ark Solar Generator from Veteran owned Portable Solar LLC. The only EMP Hardened Solar Generator System available to the public.
  2. A Gunsite Academy Three Day Course Certificate. This can be used for any one, two, or three day course (a $1,095 value),
  3. A course certificate from onPoint Tactical for the prize winner’s choice of three-day civilian courses, excluding those restricted for military or government teams. Three day onPoint courses normally cost $795,
  4. DRD Tactical is providing a 5.56 NATO QD Billet upper. These have hammer forged, chrome-lined barrels and a hard case, to go with your own AR lower. It will allow any standard AR-type rifle to have a quick change barrel. This can be assembled in less than one minute without the use of any tools. It also provides a compact carry capability in a hard case or in 3-day pack (an $1,100 value),
  5. Two cases of Mountain House freeze-dried assorted entrees in #10 cans, courtesy of Ready Made Resources (a $350 value),
  6. A $250 gift certificate good for any product from Sunflower Ammo,
  7. American Gunsmithing Institute (AGI) is providing a $300 certificate good towards any of their DVD training courses.

Second Prize:

  1. A gift certificate from Quantum Harvest LLC (up to a $2,200 value) good for 12% off the purchase of any of their sun-tracking models, and 10% off the purchase price of any of their other models.
  2. A Front Sight Lifetime Diamond Membership, providing lifetime free training at any Front Sight Nevada course, with no limit on repeating classes. This prize is courtesy of a SurvivalBlog reader who prefers to be anonymous.
  3. A Glock form factor SIRT laser training pistol and a SIRT AR-15/M4 Laser Training Bolt, courtesy of Next Level Training, which have a combined retail value of $589,
  4. A Three-Day Deluxe Emergency Kit from Emergency Essentials (a $190 value),
  5. Two 1,000-foot spools of full mil-spec U.S.-made 750 paracord (in-stock colors only) from www.TOUGHGRID.com (a $240 value).
  6. An assortment of products along with a one hour consultation on health and wellness from Pruitt’s Tree Resin (a $265 value).

Third Prize:

  1. Three sets each of made-in-USA regular and wide-mouth reusable canning lids. (This is a total of 300 lids and 600 gaskets.) This prize is courtesy of Harvest Guard (a $270 value)
  2. A Royal Berkey water filter, courtesy of Directive 21 (a $275 value),
  3. Expanded sets of both washable feminine pads and liners, donated by Naturally Cozy (a $185 retail value),
  4. Two Super Survival Pack seed collections, a $150 value, courtesy of Seed for Security, LLC,
  5. Mayflower Trading is donating a $200 gift certificate for homesteading appliances.

Round 84 ends on September 30th, so get busy writing and e-mail us your entry. Remember that there is a 1,500-word minimum, and that articles on practical “how to” skills for survival have an advantage in the judging.



Creating a Survival Team Charter, by L.K.R.

In the event of a SHTF event, my family and friends have long intended to co-locate and pool our skills and resources. While this was a great idea, we never documented how this group would be organized or how we would share responsibilities. Two things motivated us to formalize our arrangement: 1) A new family made it clear that they were committed to mutual support and started a more detailed discussion of how this would work. 2) We came across a new book, The Survival Group Handbook by Charley Hogwood.

Hogwood does a great job of discussing the practical issues we will all face if co-located with a group of like-minded people who nonetheless will have very different personalities and problem-solving approaches. The book covers a wide range of subjects including group leadership, defining your objectives, dealing with social conflict, establishing a retreat location, defining roles for group members, how to use group projects to build teamwork, planning for contingencies, decision making approaches, how to activate the group, communication, meetings, new members, resource distribution and dealing with the outside world / threats.

We used this as a basis to create a Team Charter for group discussion and agreement. The structure of this charter is outlined below along with a description of what content is needed in each section.Continue reading“Creating a Survival Team Charter, by L.K.R.”



The Survivalist’s Odds ‘n Sods:

SurvivalBlog presents another edition of The Survivalist’s Odds ‘n Sods— a collection of news bits and pieces that are relevant to the modern survivalist and prepper from “JWR”. Our goal is to educate our readers, to help them to recognize emerging threats and to be better prepared for both disasters and negative societal trends. You can’t mitigate a risk if you haven’t first identified a risk. Today, we look at a U.S. Navy jet crash at Star Wars Canyon.

Some Gun Purchases in N.Y. Now Delayed 30 Days

Reader H.L. sent this: Gun purchases in New York will now take longer, after gov signs new law. JWR’s Comment: This underscores the profoundly arbitrary nature of modern statutory jurisdiction.  Why 30 days? Why not 30 months? Our elected “representatives” are just tossing numbers around. Welcome to the era of Feel Good Dart Board Politics.

How Hong Kong Protestors Neutralize Tear Gas Canisters

A hat tip to Karen B. for spotting this: The clever trick pro-democracy protesters use to neutralise tear gas canisters fired by police during Hong Kong riots.

Jet Crash at Star Wars Canyon

By way of Whatfinger.com, comes this: Navy fighter jet crashes in California’s Death Valley, injuring at least 7 visitors. JWR’s Comment: The low-level fly-bys there, are legendary.Continue reading“The Survivalist’s Odds ‘n Sods:”







Investing in Businesses and Schools as Well as Preps?, by Captswife

I have been disturbed lately to hear about profitable, mom-and-pop businesses closing because there is no one willing to buy them. The circumstances that bother me the most have been businesses that served preppers and others who wish to be part of maintaining important, traditional skills, such as gun manufacturing and quilting.

I have done my share of prepping and know others who do and have, and I have seen thousands upon thousands of dollars spent on items that likely will never be used because they are supplies for a nationwide, grid-down scenario. Most emergencies — and I have been through a major one myself — are household or family financial, and relatively short-term. In my personal experience and that of others i know, these can be managed with a few well-chosen prepping resources and sufficient cash to cover deductibles or short-to-intermediate term job loss.

But what if committed peppers were to spend a larger portion of the dollars “invested” in material goods on starting private schools, or buying profitable local businesses from retirees? What would the benefits be to you, your family and your community? It’s not the typical approach to prepping, but have you done the math? How much have you spent in the last few years on preps? Hundreds? Thousands? How much have you used? And what is happening with what you purchased 5 or 10 years ago?  How much have you had to destroy because it is no longer fit to use? In fact, when the last time you inventoried your preps?

I am not saying “don’t prep.” I’m saying, think longer term, and outside your own personal warehousing. For example, private schools using the Charlotte Mason methods and philosophies — which are, in my view, the most prepper friendly of all those currently available — are growing rapidly in number around the U.S. and globally. (You can learn more at everythingcharlottemason.com) Organizations such as Ambleside International have an established program for helping start a school. You need some cash and a couple other households to get started, but education is always a concern with those of us in the prepper community. However, you can see how the time and money spent to establish a private school that can run in all conditions creates a long term answer to this need.

So, too, looking for a business for sale that continues an important product or service (or both, in the case of a quilt shop). Consider whether you may have the skills to run it well yourself. What does it take? Well, a few thousand dollars, and knowledge. (The family at one of JWR’s favorite blogs, Paratus Familia, has done this with their successful butcher shop.) But preppers have always been hard workers, so, what’s the big deal? And, again, like the school, you are building something with some staying power that is a benefit to yourself and others in an emergency situation, and establishes you as a vital member of your community.

Here’s a demographic fact: old Boomers fell for the “zero population growth” rhetoric promoted by the mainstream media and churches in the 1960s and 1970s. This means there are not enough Gen Xers to fill the shoes left by retiring and dying Boomers. And, as we all know, Millennials, thanks to their debt loads and a lagging economy early in their adult lives, are behind the typical timeline for home ownership, let alone business ownership. This leaves empty storefronts, and areas lacking in services and products.

So if you are reading this, and have squirreled away a bunch of cash (or were planning to buy a $10,000 generator for  “just in case”), then why not consider putting some of it to another good use. Keep what you need for the most common emergencies, then get to work on building something that — no matter what happens — has created a strong, prepper-friendly addition to your personal lives, to the next generation and to your community.



Dehydration and Rehydration, by Dr. Marc

One of the great killers in the third world is dehydration from diarrhea and dysentery, due to contaminated water. This is particularly dangerous with respect to the elderly and children.
As your readers are likely aware, having the ability to filter or purify drinking water is critical. Having a high volume and high-capacity water filter can go a long way toward preventing diarrhea and dysentery, with its associated dehydration.
I very much recommend, based upon personal experience, water filters including the Katadyn endurance series and the Sawyer inline series.  Both of these vendors have extremely long lived, large volume and quality filters for drinking water. They have the capacity to filter many thousands of gallons of drinking water and they are appropriate for North America.
Please note that travel to Africa and other areas where the water is contaminated with viruses should entail the use of a water purifier, not a filter, which often has an iodine element. These have lesser volume capacity by necessity, but the water is treated for viruses.  As you know, there are additional options to purify water including UV sterilization, boiling, and so on.
One critically important thing to know is how to treat dehydration from dysentery.  Because dysentery often occurs remote from medical care and IV hydration, the world health organization created an oral rehydration solution. This has been shown to reduce the mortality from dehydration associated with dysentery by as much as 93% .
It behooves readers to learn how to make this solution and how to administer it. The following quote from Wikipedia is informative:

 “The formula for the current WHO oral rehydration solution (also known as low-osmolar ORS or reduced-osmolarity ORS) is 2.6 grams (0.092 oz) salt (NaCl), 2.9 grams (0.10 oz) trisodium citrate dihydrate (C6H5Na3O7⋅2H2O), 1.5 grams (0.053 oz) potassium chloride (KCl), 13.5 grams (0.48 oz) anhydrous glucose (C6H12O6) per litre of fluid.[15] This is 44 mmol salt, 10 mmol trisodium citrate dihydrate, 20 mmol potassium chloride, and 75 mmol anhydrous glucose per litre. This would have a total osmolarity of (44×2 + 10×4 + 20×2 + 75) = 243 mOsm/L.

A basic oral rehydration therapy solution can also be prepared when packets of oral rehydration salts are not available. It can be made using 6 level teaspoons (25.2 grams) of sugar and 0.5 teaspoon (2.9 grams) of salt in 1 litre of water.[16][17] The molar ratio of sugar to salt should be 1:1 and the solution should not be hyperosmolar.[18] The Rehydration Project states, “Making the mixture a little diluted (with more than 1 litre of clean water) is not harmful.”[19]

WHO/UNICEF guidelines suggest ORT should begin at the first sign of diarrhea in order to prevent dehydration.[32][33] Babies may be given ORS with a dropper or a syringe. Infants under two may be given a teaspoon of ORS fluid every one to two minutes. Older children and adults should take frequent sips from a cup, with a recommended intake of 200-400 ml of solution after every loose [bowel] movement.[1] WHO recommends giving children under two a quarter- to a half-cup of fluid following each loose bowel movement and older children a half- to a full cup. If the person vomits, the caretaker should wait 5–10 minutes and then resume giving ORS.[20](Section 4.2) ORS may be given by aid workers or health care workers in refugee camps, health clinics and hospital settings.[34] Mothers should remain with their children and be taught how to give ORS. This will help to prepare them to give ORT at home in the future. Breastfeeding should be continued throughout ORT.[20]

I strongly encourage your readers to do a little online research into how to treat dysentery, and how to mitigate the dangerous effects of dehydration, through the appropriate administration of oral rehydration solution.