Sovereignty Module: Purify the Source
Purify the Source
Complete Water Purification, Testing, and Treatment Guide
Complete Water Purification, Testing, and Treatment Guide
Clean water is the single most critical survival need after air. This campaign covers every method of making water safe to drink, from primitive to advanced.
Chapter 1: Water Contaminants
| Contaminant Type | Examples | Health Effect | Treatment Method |
|---|---|---|---|
| Bacteria | E. coli, cholera, typhoid, salmonella | Diarrhea, dysentery, death | Boiling, chlorine, UV, filtration |
| Viruses | Hepatitis A, norovirus, rotavirus | Vomiting, liver damage | Boiling, chlorine, UV (NOT filtration alone) |
| Protozoa | Giardia, cryptosporidium, amoeba | Severe diarrhea, cramps | Filtration (1 micron), boiling, UV |
| Parasites (worms) | Guinea worm, schistosoma | Organ damage, pain | Filtration (any), boiling |
| Chemicals | Pesticides, heavy metals, nitrates | Cancer, organ damage, death | Activated carbon, distillation, reverse osmosis |
| Sediment | Dirt, sand, silt | Turbidity (harbors pathogens) | Settling, filtration |
| Turbidity | Suspended particles | Reduces effectiveness of other treatments | Pre-filter or settle before treating |
Chapter 2: Treatment Methods Compared
| Method | Kills Bacteria | Kills Viruses | Removes Protozoa | Removes Chemicals | Removes Sediment | Difficulty | Cost |
|---|---|---|---|---|---|---|---|
| Boiling (1 minute at rolling boil) | Yes | Yes | Yes | No | No | Very low | Fuel cost |
| Chlorination (bleach) | Yes | Yes | Partial (not crypto) | No | No | Low | Very low |
| Solar disinfection (SODIS) | Yes | Yes | Yes (6+ hours) | No | No | Very low | Free |
| UV light (SteriPEN) | Yes | Yes | Yes | No | No | Low | Moderate (device) |
| Ceramic filter | Yes | No (pores too large) | Yes | Partial (if silver-impregnated) | Yes | Moderate | Low |
| Biosand filter | Yes (95-99%) | Partial (70-90%) | Yes (99%) | Partial | Yes | Moderate | Very low |
| Activated carbon | Partial | No | No | Yes (excellent) | Partial | Moderate | Moderate |
| Distillation | Yes | Yes | Yes | Yes (most) | Yes | Moderate-high | Fuel cost |
| Reverse osmosis | Yes | Yes | Yes | Yes | Yes | High | High |
Chapter 3: Boiling (Most Reliable)
| Condition | Boiling Time | Notes |
|---|---|---|
| Sea level | 1 minute at rolling boil | Kills all pathogens |
| 5,000 ft elevation | 3 minutes | Lower boiling point = less effective |
| 10,000 ft elevation | 5 minutes | Significantly lower boiling point |
| Turbid water | Pre-filter first, then boil | Sediment protects pathogens from heat |
Boiling is the GOLD STANDARD. If you can boil water, you can make it safe. No chemicals, no equipment beyond a container and fire. Works against everything biological. Does NOT remove chemical contamination.
Chapter 4: Biosand Filter Construction
| Layer (top to bottom) | Material | Depth | Function |
|---|---|---|---|
| 1. Diffuser plate | Perforated plate or rocks | 2 inches above sand | Prevents disturbing biological layer |
| 2. Standing water | Water | 2 inches above sand | Maintains biological layer (biolayer) |
| 3. Fine sand (biological zone) | 0.15-0.35mm sand | 20 inches | Biological layer (schmutzdecke) removes 95-99% bacteria |
| 4. Separation gravel | 3-6mm gravel | 2 inches | Prevents sand from entering drainage |
| 5. Drainage gravel | 6-12mm gravel | 2 inches | Allows water to flow to outlet |
| 6. Underdrain gravel | 12-20mm gravel | 2 inches | Protects outlet pipe |
| 7. Outlet pipe | PVC or bamboo | Through container wall | Delivers clean water (must be above sand level) |
Container: Concrete, plastic barrel, or large clay pot. Must be tall enough for all layers (minimum 3 feet). Outlet pipe positioned at sand surface level (maintains standing water above sand).
Ripening period: New filter takes 2-4 weeks to develop biological layer (schmutzdecke). During this time, effectiveness is lower. After ripening: 95-99% bacteria removal, 99% protozoa removal, 70-90% virus removal.
Chapter 5: Chemical Treatment
| Chemical | Dose | Contact Time | Effective Against | Notes |
|---|---|---|---|---|
| Household bleach (5.25% sodium hypochlorite) | 2 drops per liter (clear water) | 30 minutes | Bacteria, viruses | Double dose for turbid water. Must smell slightly of chlorine after 30 min. |
| Household bleach (8.25% — newer formulation) | 2 drops per liter (clear water) | 30 minutes | Bacteria, viruses | Same as above |
| Calcium hypochlorite (pool shock, 68%) | 1/4 teaspoon per 5 gallons | 30 minutes | Bacteria, viruses | Stores better than liquid bleach (years vs. months) |
| Iodine (2% tincture) | 5 drops per liter (clear water) | 30 minutes | Bacteria, viruses, some protozoa | Not for pregnant women or thyroid conditions |
| Potassium permanganate | 1-2 crystals per liter (light pink color) | 30 minutes | Bacteria, viruses | Also indicates dosing by color |
Chlorine limitations: Does NOT kill Cryptosporidium. Effectiveness reduced by turbidity, cold water, and organic matter. Always pre-filter turbid water before chlorinating.
Chapter 6: Solar Disinfection (SODIS)
| Step | Action | Details |
|---|---|---|
| 1 | Fill clear PET plastic bottles (2-liter soda bottles) | Must be clear (not colored). Remove labels. |
| 2 | Pre-filter if turbid (must be able to read newspaper through bottle) | Cloth filter or settling |
| 3 | Place bottles on reflective surface (corrugated metal roof) | Horizontal, not vertical. Maximum sun exposure. |
| 4 | Expose to full sun for 6+ hours (or 2 days if cloudy) | UV-A radiation kills pathogens |
| 5 | Water is safe to drink after exposure period | Use within 24 hours (recontamination risk) |
SODIS effectiveness: Kills 99.9% of bacteria, viruses, and protozoa with 6+ hours of strong sunlight. Free, requires no chemicals or fuel. Limitations: only works with clear water, small volumes (2L per bottle), requires strong sunlight.
Reference Card
- Boiling: 1 minute at rolling boil (sea level). Gold standard. Kills everything biological.
- Bleach: 2 drops per liter of clear water. Wait 30 minutes. Must smell slightly of chlorine.
- SODIS: clear PET bottles, full sun, 6+ hours on reflective surface. Free and effective.
- Biosand filter: 20 inches of fine sand. Takes 2-4 weeks to ripen. Then 95-99% bacteria removal.
- Always pre-filter turbid water before any treatment. Sediment protects pathogens.
- Distillation: only method that removes BOTH biological AND chemical contamination.
- Calcium hypochlorite (pool shock): stores for years. Better than liquid bleach for long-term storage.
- Multi-barrier approach: settle → filter → disinfect (boil or chlorinate). Multiple steps = maximum safety.
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