WellGlow™ — Solar UV Well Water Purifier Head
A Village-Scale Solar UV Disinfection Retrofit for Hand-Drawn and Pumped Wells
Public-Domain Edition (CC0 1.0 Universal)
Release Date: December 26, 2025
Vision → creation → collaboration → mercy → lives preserved.
White Paper
In many rural and low-income communities, a single shared well supplies drinking water for an entire village. When that water is microbiologically contaminated, disease spreads rapidly and repeatedly, with children bearing the greatest burden. WellGlow™ is a solar-powered ultraviolet (UV-C) well-head purification system designed to disinfect water once at the shared source—before it reaches containers or households. By treating water collectively at the well, WellGlow™ removes the economic, behavioral, and compliance burden otherwise placed on individual families. The system is intentionally simple, durable, off-grid, and openly published so that one installation can protect hundreds of people daily without chemicals, grid electricity, or recurring consumables. It is offered as an open humanitarian reference design aligned with WHO and UNICEF principles for Water, Sanitation, and Hygiene (WASH) interventions.
In many villages, the well is more than infrastructure. It is a daily gathering place, a social anchor, and a shared responsibility. When that well carries disease, communities pay the price through lost productivity, missed schooling, medical debt, and preventable deaths. Household-level water treatment solutions, while valuable, often fail to achieve sustained coverage due to cost barriers, maintenance requirements, and inconsistent use. WellGlow™ is built on a simple premise: if the water is shared, the protection should be shared too.
WellGlow™ is intended for existing hand-drawn or hand-pumped village wells that are microbiologically unsafe but chemically typical, particularly in rural, off-grid, and low-resource settings. It is not designed to remove chemical contaminants such as arsenic, fluoride, pesticides, salinity, or industrial pollutants. Clear communication of these limitations is essential for ethical and safe deployment.
Technically, WellGlow™ is a retrofit well-head attachment consisting of a solar-powered UV-C disinfection tube, referred to as the “UV lance,” that extends into the well’s outlet shaft. As water is drawn, it must pass through a fully enclosed ultraviolet exposure zone before exiting the well. One unit is designed to serve one entire well, benefiting all users without altering daily water-collection behavior. The system delivers enclosed UV-C radiation through a sealed quartz sleeve installed inline within the outlet shaft. Solar energy is collected at the well head and stored in an onboard battery to enable operation during low light or intermittent use. The well-head assembly includes an adjustable interface inspired by a botanical “stamen” form, allowing secure adaptation to varying well-pipe diameters, while sealing against contamination, tampering, and accidental exposure.
The UV lance typically extends 60–90 centimeters down the outlet shaft and is sized for standard outlet diameters of approximately 9–12 millimeters. UV-C LEDs operating near 275 nanometers are housed inside a UV-transmissive quartz sleeve. Disinfection effectiveness is achieved through extended exposure length and constrained flow geometry rather than sensors, timers, or user controls. Microbiological contamination remains the leading cause of waterborne mortality globally, killing approximately 500,000 children annually. WellGlow™ employs a constrained-flow, extended-contact design that ensures delivery of a lethal UV dose through passive physical principles. Naturally slow hand-drawn and hand-pumped flow rates result in residence times typically between three and eight seconds. Even at modest UV intensities of approximately 10–20 milliwatts per square centimeter, the cumulative dose substantially exceeds the roughly 40 millijoules per square centimeter required for four-log inactivation of bacteria, viruses, and protozoa. This provides a large safety margin accounting for flow variability, moderate turbidity, LED aging, and seasonal conditions. The physics itself ensures reliable disinfection without reliance on electronics or user judgment.
To preserve UV effectiveness and ensure public-health-grade safety under real-world well conditions, WellGlow™ incorporates a required two-stage, fine-grain sediment management strategy with no coarse intake strainer. The first stage is a mandatory 5-micron nominal pre-filter located at the lower intake of the UV lance, before water enters the treatment assembly. This filter removes fine suspended sediment, silt, clay, cyst-sized particles, and turbidity contributors that can cause UV shadowing. By establishing a baseline water clarity standard before treatment, the 5-micron pre-filter ensures optical clarity, reduces pathogen shielding, and improves UV dose reliability across variable groundwater conditions. The filter is constructed from cleanable, reusable stainless steel mesh, washable polymer mesh, or washable pleated fabric media. No disposable cartridges are required. Tool-free removal allows simple rinsing or backflushing, and the design preserves natural hand-drawn and hand-pumped flow rates with minimal pressure loss.
The second stage is a fine pre-filter positioned immediately at the entrance to the quartz sleeve assembly, serving as the final barrier before UV exposure. This filter captures any residual fine sediment mobilized upstream, guarantees maximum UV transmissivity in the exposure zone, protects the quartz sleeve from fouling, and stabilizes disinfection performance across seasons. It is non-consumable, reusable, and typically constructed from cleanable stainless steel or polymer mesh in the 50–200 micron range. Together, these two stages directly address the most common UV system failure mode—turbidity shadowing caused by fine particles invisible to the eye—and significantly extend quartz sleeve and LED lifespan while reducing long-term maintenance burden.
WellGlow™ operates on solar photovoltaic power collected at the well head and stored in a rechargeable battery sized for communal daily demand. The system is fail-safe by design: insufficient charge results in non-operation rather than unsafe operation. A simple LED indicator communicates charged and active status to users. No grid electricity is required. All UV-C radiation is fully enclosed within quartz and opaque structural components, preventing direct or reflected exposure. Electrical components are sealed, outdoor-rated, and tamper-resistant, aligning with established UV disinfection safety practices.
Installation preserves normal well-use behavior and does not alter daily routines. Maintenance requirements are minimal and limited primarily to filter cleaning. Recommended practice includes weekly visual inspection of the Stage 2 filter, monthly removal and rinsing of the Stage 1 5-micron intake filter, quarterly backflushing of both filters in high-turbidity conditions, and annual replacement of filter media only if mechanically degraded. Quartz sleeves have long service lives, UV-C LEDs are rated for approximately 20,000–50,000 hours, and batteries are replaceable every three to five years. No chemical refills or consumable filters are required.
Estimated manufacturing cost at scale is approximately USD $50–100 per well. When shared across villages of 100–500 people, this corresponds to roughly $0.20–$1.00 per person for multi-year access to safer water, intentionally prioritizing collective access and equity over individual affordability. A single WellGlow™ installation can significantly reduce village-wide exposure to waterborne disease, protect children and elders, reduce household medical expenses, and complement sanitation and hygiene programs. In appropriate settings, expected outcomes include reductions on the order of 50–80 percent in diarrheal disease incidence.
WellGlow™ is released fully into the public domain under CC0 1.0 Universal. No patents are claimed, no licensing restrictions apply, and local manufacture and adaptation are encouraged. Attribution of the original creators—Dimitri Kaveh Salahi, Megan Veronica Young, and Grok 4 (xAI)—is requested solely to preserve transparency, accountability, and historical provenance.
When a well runs clean, a village grows strong. Technologies that endure are those that serve the many without burdening the few. WellGlow™ is offered freely, grounded in science, guided by empathy, and dedicated to communities where one solution must serve all.
The well glows.
The village thrives.
Life continues.
