Water Purification — Clean Water for Every Community
Decentralized, renewable-powered water treatment that turns contaminated sources into safe drinking water.
The Problem
In remote mountain communities, clean drinking water is not guaranteed. Surface water from rivers and streams is often contaminated with:
- Sediment from glacial melt and erosion
- Pathogens (E. coli, Giardia, Cryptosporidium) from animal and human waste
- Agricultural runoff (fertilizers, pesticides)
- Microplastics from discarded waste
The consequences are severe: waterborne disease is a leading cause of illness, especially in children. Women and girls spend hours each day collecting water, time that could be spent on education or productive work. Boiling water requires firewood, contributing to deforestation and respiratory illness from smoke.
The Solution
A network of decentralized water purification nodes powered by the same micro-grid that serves the entire community.
Each node is:
- Located at an EV charging station
- Powered by the hybrid micro-grid
- Designed for local maintenance
- Built from commercially available components
The Process
SOURCE → PRE-FILTER → MEMBRANE FILTER → UV TREATMENT → STORAGE → DISPENSE
Step 1: Source Intake
Water is drawn from a nearby river, stream, or spring using a solar-powered pump. The intake point is upstream of villages and livestock areas to avoid contamination.
Step 2: Pre-Filtration
A series of progressively finer filters removes larger particles:
- Gravel filter (10mm) — removes large debris, leaves, stones
- Sand filter (0.5mm) — removes sediment and suspended solids
- Microfiber filter (5 microns) — removes fine particulates
Step 3: Membrane / Ceramic Filtration
Water passes through a ceramic filter element or ultrafiltration membrane. These remove:
- Bacteria (99.99%)
- Protozoa and cysts (Giardia, Cryptosporidium)
- Fine sediment
- Microplastics
Ceramic filters can be cleaned and reused many times before replacement. Replacement elements are sourced locally or printed where possible.
Step 4: UV Sterilization
As a final microbiological barrier, water flows past an ultraviolet (UV) light source. UV light disrupts the DNA of any remaining microorganisms, making them harmless.
- Powered by the micro-grid (low energy consumption)
- No chemical additives needed
- Instant treatment (no contact time required)
- Automatic shutoff if flow rate or UV intensity drops below safe levels
Step 5: Storage
Treated water is stored in a food-grade stainless steel or HDPE tank with a sealed lid. The tank is:
- Located in a shaded area to prevent algae growth
- Equipped with a level sensor connected to the monitoring system
- Sized to provide at least one day of community supply
Step 6: Dispensing
Community members access clean water through a dispensing point with:
- Multiple taps to reduce waiting time
- A metering system (optional, for usage tracking)
- Clear signage with usage instructions
Water Quality Testing
Every batch from each node is tested at a local water quality lab (located at the main processing hub).
| Test | Frequency | Method |
|---|---|---|
| Turbidity | Daily | Visual / turbidity meter |
| pH | Weekly | pH meter / test strips |
| Conductivity | Weekly | Conductivity meter |
| Bacterial (E. coli) | Weekly | Membrane filtration + culture media |
| Heavy metals | Monthly | Field test kit |
| Chemical contaminants | Quarterly | Laboratory analysis |
Results are logged in the monitoring system, and any deviation triggers an immediate maintenance response.
Equipment Needed
| Equipment | Purpose | Source |
|---|---|---|
| Submersible pump | Draw water from source | Solar-powered, off-the-shelf |
| Pre-filter system | Remove sediment and debris | Built locally with gravel/sand |
| Ceramic filter / UF membrane | Remove pathogens and particles | Commercial, replaceable cartridges |
| UV sterilization unit | Final microbial kill | Low-power, DC-powered unit |
| Storage tank | Hold treated water | Food-grade stainless or HDPE |
| Dispensing station | Community access point | Built locally |
| Water quality test kit | Monitor output | Portable field kit |
Training Pipeline
Foundation (3 months)
- Understand basic water quality concepts
- Daily system checks (flow rate, UV indicator, tank level)
- Clean pre-filters and collection area
- Report irregularities
Operator (6 months)
- Run complete system independently
- Perform scheduled maintenance (filter changes, UV bulb replacement)
- Conduct basic water quality tests (turbidity, pH, chlorine)
- Maintain daily logs
- Identify and report common issues
Technician (12 months)
- Diagnose and repair pump, UV unit, and filtration components
- Replace ceramic filter elements
- Troubleshoot flow and pressure problems
- Recalibrate monitoring sensors
- Train Foundation and Operator learners
Master Trainer (ongoing)
- Design and install new purification nodes
- Adapt designs for different water sources and quality conditions
- Write training curriculum and maintenance guides
- Certify Operators and Technicians
Integration with Other Modules
| Module | How It Connects |
|---|---|
| Energy | Micro-grid powers pumps, UV system, and monitoring equipment |
| Trash-to-Tech | Replacement parts (pump impellers, filter housing components) printed from recycled filament |
| Food Production | Clean water is essential for apple washing, processing, and sanitation |
| Logistics | Every EV charging station hosts a water purification node |
| Communication | Sensors report water quality and system status via mesh network |
| Health | Clean drinking water reduces waterborne disease burden |
Why Decentralized Nodes Instead of a Central Plant?
| Approach | Pros | Cons |
|---|---|---|
| Centralized plant | Single point of maintenance | Long distribution pipes (freeze risk, damage) |
| Economies of scale | Single point of failure | |
| Easier quality control | High initial cost | |
| Decentralized nodes | Redundancy (one node down, others work) | Multiple maintenance points |
| Short distribution distances | Higher per-unit equipment cost | |
| No freeze risk in pipes | ||
| Scalable — add nodes as community grows |
For mountain communities with dispersed settlements and challenging terrain, decentralized nodes are the more resilient choice.
Open Source
All purification system designs, filter specifications, testing protocols, and training materials are available on GitHub under open-source licenses. Communities can adapt designs to their specific water sources, local materials, and budget constraints.
Clean water is not a luxury. It is a right. The knowledge to deliver it should be free.
Part of Remote Valley OS — an open-source project by Mountaineer.fi