Updated on January 2, 2024


Created on August 27, 2015

Gadyen Dlo

Gadyen Dlo, distributed in Haiti, is a chlorine solution to disinfect water.

Tested By
  • Centers for Disease Control and Prevention (CDC) Foundation
  • Emory University
Content Partners


Product Description

Gadyen Dlo, or “Water Guardian” in Haitian Creole, is a liquid chlorine product sold by the bottle to disinfect drinking water. This product is intended to remove/inactivate bacterial, viral, and some parasitic contamination from drinking water.

Target SDGs

SDG 6: Clean Water and Sanitation

SDG 3: Good Health and Well-Being

Market Suggested Retail Price


Target Users (Target Impact Group)


Distributors / Implementing Organizations

Deep Springs International (DSI), UNICEF, and Jolivert Safe Water for Families.

Competitive Landscape

Direct competitors include P&G Purifier of Water, Aquatab Tablets, Klorfasil, and WaterGuard.

Manufacturing/Building Method

Locally produced in Léogâne, Haiti via machine-automated processing.

Intellectural Property Type

Select Type

User Provision Model

User can directly contact the manufacturer. The product is sold in Léogâne, Haiti via a network of 150 health workers.

Distributions to Date Status

The distributer claims that about 2,000,000 people have been impacted.

Active Chemical and concentration (%)

Sodium Hypochlorite, NaOCl (0.7)



Dosing method: Batch or flow-through


Dosing method: Automatic or manual


Dosing quantity

1 cap/18.9 L

Contact time (min)


Target free disinfectant residual (mg/L)


Bacteria reduction

2 log (under appropriate conditions)

Virus reduction

2 log (under appropriate conditions)

Protozoa reduction


Heavy metals and/or arsenic reduction


Treatment lifespan (days)

6 (per 1 pack for 1 average family)

Maximum recommended influent turbidity level (NTU)

Must be low prior to treatment

Design Specifications

Included is one 8 ounce bottle with cap for dosing and instructions in Haitian Creole with illustrations. Other purchasing option is 1 gallon containers. Almost always, 5 gallon safe-water-storage buckets with spout are distributed for free.

Product Schematics

Technical Support

Deep Springs International

Replacement Components

Single-use product


8 oz bottle treats 700 L of water

Manufacturer Specified Performance Parameters

The product can treat an average family's water for 6 weeks.

Vetted Performance Status

In conjunction with proper household treatment and storage, tests have shown 80% reduction in water-borne diseases.


If one family is using a container that is not covered, it will need to treat the water every 24 hours. If the container is covered and has a tap, the family only needs to treat it one time.

Complementary Technical Systems

Filtration method and safe water storage system

Academic Research and References

Harshfield et al., Evaluating the Long-Term Health Impact of Household Chlorination of Drinking Water in Rural Haiti, Proceedings of the Water Environment Federation, 2011, pp. 274-302(29)

Lantagne and Clasen, Use of Household Water Treatment and Safe Storage Methods in Acute Emergency Response: Case Study Results from Nepal, Indonesia, Kenya, and Haiti, Environmental Science & Technology, September 2012, 46(20):11352-60

Garnett, Erin. Gadyen Dlo “Water Guardian”: A Qualitative Study of the Influence of Cholera on Household Water Treatment Practices in Haiti, Thesis, Emory University (2013)

“U.S. Non-Profit Organization,” Deep Springs International, 27-Jan-2020. Available: https://deepspringsinternational.org/

Cdc.gov. Available: https://www.cdc.gov/safewater/PDF/SWS-rural-populations-Haiti-508c.pdf

“Market suggested retail price,” Deep Springs International, 27-Jan-2020. Available: https://deepspringsinternational.org/wp-content/uploads/2020/01/Products-page.pdf

“Water, Sanitation and Hygiene?:,” PSI, 03-Mar-2020. Available: https://www.psi.org/practice-area/wash/

“Aquatabs,” Aquatabs.com. Available: https://www.aquatabs.com/

“Goal 6,” Sdgs.un.org. Available: https://sdgs.un.org/goals/goal6

Cdc.gov. Available: https://www.cdc.gov/cholera/pdf/chw_trainingmaterialsforcholera_v2.pdf

“Technical support,” RFID JOURNAL, 10-Mar-2011. Available: https://www.rfidjournal.com/in-haiti-rfid-tracks-drinking-water

“Listing Category Search Page,” Nsf.org. Available: https://info.nsf.org/Certified/PwsChemicals/Listings.asp?CompanyName=&TradeName=&ChemicalName=Sodium+Hypochlorite&ProductFunction=&PlantState=&PlantCountry=&PlantRegion=

CAWST, “Implementation Case Study: Gadyen Dlo Chlorine and Aquatabs, Haiti,” Case Study: Implementation Case Study: Gadyen Dlo Chlorine and Aquatabs, Haiti. Available: https://www.biosandfilters.info/case-study/faab6460/implementation-case-study-gadyen-dlo-chlorine-and-aquatabs-haiti

Compliance with regulations

NSF / ANSI Standard 60: Drinking Water Treatment Chemicals: Gadyen Dlo is not specifically listed as complying, but dozens other companies selling sodium hypochlorite products for drinking water treatment are approved. This certifies that chemicals are safe at the maximum dose and that any impurities are below the maximum allowable limit. US Environmental Protection Agency (EPA) Registration: Gadyen Dlo is not registered with the EPA but sodium hypochlorite has been since 1957, and the EPA issued a registration standard in 1986 saying that sodium hypochlorite products (with 5.25% – 12.5% chlorine) do not need individual registration review. World Health Organization (WHO) Guidelines for Drinking Water Quality list liquid NaOCl with concentrations between 0.5% and 1% as a point-of-use water treatment method.

Evaluation methods

Lab and field evaluations

Other Information

Gadyen Dlo report by Pepahaiti Implementation Case Study: Gadyen Dlo Chlorine and Aquatabs in Haiti by CAWST

Comments from the Community

1 Comment

  1. Anna Murray says:

    On competitive landscape, I would not call out Gadyen Dlo specifically, but would just say liquid sodium hypochlorite (Such as Water Guard or Gadyen Dlo). Also, Bishan Gari (Bishan Gari Purification Industries PLC, Addis Ababa, Ethiopia), and Water Makerâ„¢ (Control Chemicals, Ltd, Johannesburg, South Africa) are similar products.

    Minor edits suggested to the description:

    P>M Purifier of Water (formerly known as PUR) is a single packet of powder which contains both a coagulant and chlorine to disinfect and reduce the turbidity of 10 liters of water.

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