2015 Chlorinator Study


340,000 Nicaraguans gain clean water

We help villages install simple water chlorinators that treat their contaminated water sources. Villagers maintain the chlorinators so the water remains safe and sustainable.

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Water Chlorinator

The CTI Water Chlorinator is an inexpensive, non-electrical water disinfectant system that was designed for communities with gravity supply water systems.

For less than $200 dollars, chlorinators can be made with simple PVC piping and installed by villagers—providing entire communities with safe water in hours.

The Water Chlorinator attaches to a gravity-fed water tank, delivering a controlled dosage of chlorine to a community’s water tank for just pennies per day. The chlorine kills most disease-causing pathogens, making the water safe to drink. 

Chlorine-based water treatment

Chlorine has been hailed by the World Health Organization as an extremely effective method of providing potable water in a village setting. In a 2010 report, the World Health Organization noted, “Disinfection of water supplies for human consumption is an important factor in the fight against waterborne diseases...Chlorine has many advantages: It is cheap, effective, easy to measure and persists in residual form, preventing recontamination."


CTI's water chlorinator is well suited for treating water with fecal or microbiological contamination, an extremely common cause of waterborne disease present in most rural water systems in Nicaragua. CTI, with the help of our partners at nonprofit EOS International, has installed water chlorinators in nearly six hundred rural communities, providing safe water to more than 340,000 villagers. Community water groups maintain the appropriate chlorine levels and pool their resources to pay for chlorine tablets. Involving village groups fosters local ownership of the equipment, an important part of ensuring the program’s sustainability.

We recently surveyed the Nicaraguan communities that are using our water chlorination technology. Here are some of the key things we learned:

  • The community water committees are maintaining their systems, with 95% of villages continuously keeping their systems stocked with chlorine after two years. 

  • The CTI Water Chlorinator is affordable. 93% of respondents "definitely agree" the price paid for the Water Chlorinators was worth the value created.

  • Villages are healthier. Communities with a CTI Chlorinator experienced a 61% reduction in acute diarrheal disease compared to communities without a water chlorination system.

  • The villagers are happier. 100% have seen a reduction in the occurence of acute diarrheal disease and 100% declare the system should be installed in every water system in Nicaragua.