the impact of Nazava Water filters health, economics and climate.

Improving Health. The transformative impact of Nazava Water Filters

620k people

with improved health

21 million US$ saved

Increased disposable income

329-thousand-ton CO2e

Reduced emissions

Nazava Water Filters have made a significant impact. In this section, we outline our achievements to date and detail the methods we use to calculate and verify our social, environmental, and economic impact

One Nazava Water Filter generates the following impact:

Nazava Water Filter WHO tested high quality affordable water filter using gravity.

$21.24

Household savings per year

3.5

Weeks time saved per year, or 17 days or 139 hours

93%

Continued use rate year on year

98%

Customer satisfaction

$2.9

Social Return on Investment (SROI) per $

0.25-ton CO2e

Reduced emissions per year

39%

Fuel savings per year

59%

Reduced diarrhea per year

SDGs certified by

Through our carbon credit verification process, we are certified by the Gold Standard for the Global Goals to directly impact the following Sustainable Development Goals:

For more information see our Gold Standard monitoring report.

Access to safely managed drinking water facilities, access to clean, safe, affordable drinking water represents a major challenge for many households in the Global South. Survey data found that users save on average $21.64 per filter per year. This is a big impact for households who live on less than $7 a day.

In low-income countries piped, well and river water have high chances of contamination. With Nazava end-users, get water that is free of contamination and also certified by WHO for bacterial removal. Surveyed users report experiencing 59% less diarrhea than non-users.

In much of the Global South, the burden of providing drinking water is often held by women. Hence, most of our beneficiaries are women who save an average of 139 hours per year.

We specifically target 6.1: Universal and equitable access to safe and affordable drinking water for all. We’ve impacted over 600,000 people worldwide to date!

Nazava provides full time employment to over 50 local people in Indonesia and Kenya and has a total of 50 people that work for us as commissioned sales agents. Our more than 100 part time resellers increase their monthly income by 14%

Since Nazava replaces the need to boil water using wood or LPG, we reduce carbon emissions. Nazava users reduce carbon emissions equal to 0.29 tCO2 per filter per year as certified by the Gold Standard.

Since Nazava replaces the need for firewood, we have saved 78.23 hectares of forest. Additionally, since Nazava reduces single use plastic bottles, we reduce plastic waste.

The health Impact of Nazava water filters

Access to safe and cheaper drinking water: 619,937 thousand people (2024) This is the number of filters in use times the family size (4.41 persons per family). Nazava Water Filters remove 99.9% of bacteria as tested by WHO. Therefore, Nazava water filter users are less likely to get diarrhea. Users surveyed in the HEC study report 59% less diarrhea than non-users. The HEC study compared how often Nazava users and non-users had experienced diarrhea in the last month, half year, one year and two years. Sources: HEC report. HEC dataset.

Economic Impact of Nazava Water Filters

Accumulative household savings 21 million USD (2024). Average saving of US$21.24/year/household that uses a filter. This figure is based on survey of 194 non-users and 757 users. 63% user LPG to boil, 23% uses wood, 26% buys water. People that boiled water on LPG before save on average IDR458K or US$32.75 per year compared to non-users. People that buy water save on average US37.71 per year compared to non Nazava users. People who boil using wood infrequently buy fuel wood. We lack data to determine savings related to buying less fuelwood.

The average cost saving per filter user

The average cost saving per filter user is then 63% x US$32.75 + US37.71 x 26% = US$30.39. The average price that people paid for the filter to our resellers is US$26.24. This figure is taken from 212 users that were interviewed for our carbon project. Nazava does not set the retail price, and the price depends on transport costs and payment terms. The filter lasts for 3 years before the candle needs to be replaced. Within the first 3-year users save 3 x US$30.39- US$26.24 = US$64.93 or US$21.64 per year. After 3 years they will save more because the replacement filter is only US$8 but we will use US$21.64 to be conservative. Source: Survey Data

Environmental Impact

Accumulative CO2 reductions; 329 thousand tCO2 (2024) of which 28879 ton have been issued as carbon credits. Based on greenhouse gas emission reduction of 0.29 tCO2/year calculated Gold Standard methodology verified by Bureau Veritas. Source: Emission Reduction calculation spreadsheet & Verification Report by Bureau Veritas , Gold Standard project page

Impact on disposable income (anti-poverty):

Accumulative increased disposable time for women who do not need to seek fuel wood or boil water: 64 thousand working years or FTE by the end of 2023. The Santa Clara study did a detailed analysis of time spend on obtaining water. They found that filter users save on average 139 hours per year which equals 0.07 FTE per filter saved per year. One full time equivalent is the number of hours in a full time labor contract. (https://www.wikihow.com/Calculate-FTE) The Santa Clara study surveyed 46 users.

Impact of our filters on jobs and income (economic impact):

100 resellers (66 women) earned an average additional monthly income of US$26. In the last 5 years we have had an average of 100 informal resellers. Together they purchased around 6000USD per month (Source sales database, audited financial reports, available on request). They sell the products on with a margin of around 30% which implies that they earn 26USD per month or about 14% of average monthly earnings (185USD source: CEIC), sales Database (accessible on request).

Social return on investment of US$2.9

Everything together adds up to a Social Return on Investment (SROI) of US$ 2,90 (as found by National University of Singapore Students study). This means that every dollar invested in Nazava yields a social return of almost three dollars, that is a very clear measure of the impact of Nazava Water filters, isn’t it?

Reports and publications.

Read more about Nazava’s impact towards health, women empowerment, and the environment, as well as our annual reports here!

More underlying data

Please find more underlying parameters in this document.