On February 23, UCSD Rotaractors held a its annual WAPI construction project on campus.  WAPIs (water pasteurization indicator) are a small reusable devices that shows when water has reached pasteurization temperature (150°F/65°C) and is safe to drink.  They resemble thermometers in size.  The class vile has wax inside and when  completely melted (pasteurization temperature), it indicates that the water is safe to drink. 
WAPIs cost a fraction of what a thermometer would cost, around $1 per WAPI.  By close of the project nearly 1100 WAPIs had been constructed by Rotaractors and Rotarians from all over the District.  WAPIs will be sent to Mexico and regions in Africa.