Plenty of tech and biotech companies have been founded at the University of North Carolina at Chapel Hill over the years, but the university is also proving to be a fertile breeding ground for public health entrepreneurship.

Four startup companies spun out of UNC’s Gillings School of Public Health will be showcased Wednesday at the “Solving Public Health Problems Through Innovation” event. The event will include presentations from Allison Myers, deputy director of Counter Tools; Liz Morris founder of Sanitation Creations; Alice Wang, co-founder of Aquagenx; and William Vizuete, chief scientific officer and co-founder of Biodeptronix. Gillings Executive in Residence Donald Holzworth is also scheduled to give a short talk.

The 5:30 p.m. event will be held at 1301 McGavran-Greenburg Building on the UNC Campus. The showcase, which is free and open to the public, is one of the featured events of Global Entrepreneurship Week at UNC Chapel Hill.

Global Entrepreneurship week is a global event that takes place each November consisting of local, national and global activities that give people the chance to explore entrepreneurship.

Here are more details on the UNC startups:

  • Counter Tools

As health care costs associated with tobacco use continue to grow, Counter Tools aims to offer training and software to help public health workers who are focused on controlling tobacco at the point of sale. Counter Tools offerings include software called Store Mapper, which is an interactive website finds and displays local tobacco retail data such as location and compliance with tobacco policies. The software also analyzes and displays relationships between tobacco retailers and locations where youth congregate such as schools, parks and community centers.

  • Sanitation Creations

People in industrialized economies take for granted conveniences such as flush toilets. Sanitation Creations has developed a portable toilet intended to bring more toilet options to an estimated 2.5 billion people worldwide who don’t have access to flush toilets. Called “Dungaroo,” the waterless, odorless toilet is made mostly of plastic materials and uses specially lined bags to treat and store the waste.

  • Aquagenx

Safe drinking is not available in some areas. Aquagenx has developed a portable water quality test kit that tells them if the drinking water contains E.coli bacteria and poses a health risk. The Aquagenx Compartment Bag Test does not require electricity, a cold supply chain, laboratories or trained technicians. Results appear with a easy to see visual color change. The company sees the CBT being used to test drinking water in developing world, disaster settings, the military and private wells, among other places.

  • Biodeptronix

Air pollution’s effects on health can be tough quantify. Biodeptronix has developed an instrument to monitor and assess airborne particles for their potential toxicity to human cells. The instrument, called Quantaire, can be used in a laboratory as well as deployed out in the field.