Watsan Envirotech

What Watsan Envirotech does

Watsan Envirotech Private Limited, headquartered in Chennai, India (incorporated 2013, roots in founder Chandrasekaran J.'s 2009 proprietary firm Custom Parts Online), manufactures gravity-based, electricity-free water purifiers and modular sanitation units targeted at rural Indian households, schools, anganwadis, tribal communities, and low-income areas affected by arsenic, fluoride, iron, and bacterial contamination. Its proprietary Terafil nano-filtration platform — clay-and-sand sintered candles licensed exclusively from CSIR-IMMT — is supplemented by AMRIT (co-developed with IIT Madras) for arsenic removal and the company's own Fluorosorb nano-material for fluoride removal, enabling a portfolio that addresses pathogens and chemical contaminants without electricity, chemicals, or water wastage, while retaining essential minerals.

The product line spans the 15L WatSan Classic and Premium stainless steel 15L WatSan Prime (priced ₹3,000–5,500), the 50L WatSan Plus for hostels/schools/clinics (₹14,500), specialized arsenic and fluoride variants (₹4,500 each), community purifiers from 50L to 2,500L, the Wottle portable purifier, the WOW (Water on Wheels) 65L roller drum, and Any Time Water vending machines; a parallel sanitation line delivers pre-fabricated modular toilets built from discarded materials. The company monetizes primarily through one-time hardware sales plus a modest replacement-cartridge stream (Terafil candles ₹700, arsenic/fluoride cartridges ₹1,300, ~2-year life), with selectively claimed carbon-credit revenues from avoided CO2e emissions.

Approximately 60% of deployments are routed through corporate CSR partnerships (CONCOR, DCB Bank, ICICI Foundation, Murugappa Group, Great Lakes, AGS Health), supplemented by direct-to-consumer e-commerce (watsan.in/shop) and channel partners (Peoples WASH Solution LLP, Erasustain) plus NGO and Rotary International alliances (including a stated 10,000-government-school mission). Watsan's value proposition rests on BIS/IS 10500 compliance, Government of India endorsements (DST, CSIR-IMMT, CIPET), five-year warranties, zero electricity requirement, and a 500,000+ household reach — most of which is concentrated in India, with nascent geographic extensions to Myanmar, Peru, Italy, and Rwanda funded largely through international grants rather than equity capital.

Name

Watsan Envirotech

Legal name

Watsan Envirotech Private Limited

Website

https://watsan.in

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

1–10 employees

Short description

Watsan Envirotech is a Chennai-based manufacturer of gravity-based, electricity-free Terafil nano-filtration water purifiers and modular toilets, serving rural Indian households, schools, tribal communities, and corporate CSR programs via patented CSIR-IMMT licensed technology.

Ownership category

akta.pro rank

Product category

Water Purification & Sanitation Equipment

NAICS

Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers (42372)

SIC

Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)

akta.pro primary industry

Filtration (Rapid/Slow Sand, Media, Membrane Pretreatment) (EUANABAB)

akta.pro secondary industries

Replacement Filter Cartridges & Consumables (CRAJAJAH), Water Softener, Filtration & Treatment System Installation (HSAOAAAH)

Keywords

• Water purification systems
• Gravity-based filtration
• Arsenic removal filters
• Fluoride removal cartridges
• Modular sanitation toilets

Headquarters

HQ city

Chennai

HQ country

India

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Water Purifier Hardware Sales: One-time sale of water purifiers (household 15L, community 50L-2500L). Products include WatSan Classic, WatSan Prime, WatSan Plus models in various capacities. Revenue from direct sales and CSR/corporate bulk purchases.
2. Filter Add-on Sales: Replacement cartridges and add-ons for arsenic and fluoride removal. Terafil candles (₹700), Arsenic removal cartridges (₹1,300), Fluoride removal cartridges (₹1,300). Cartridges last 2 years before replacement.
3. Accessories Sales: Accessories including candle pump, roller, wall mounting stand (₹750), hand air pump (₹100), and Water on Wheels (WOW) portable roller drum (₹3,000).
4. Carbon Credits: Earned carbon credits through sustainable practices. Saved 2.4 million tonnes of CO2e by promoting non-electric purification and avoiding boiling of water. Reduced reliance on firewood for boiling water.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels9 records

Core offering

Watsan Envirotech manufactures and sells gravity-based, electricity-free water purifiers using proprietary Terafil™ nano-filtration technology (clay and sand sintered candles licensed from CSIR-IMMT). Its portfolio spans household 15L purifiers, high-capacity community purifiers (50L-2500L), portable travel purifiers (Wottle), and replacement cartridges for arsenic and fluoride removal. The company also produces ready-to-fit modular toilets constructed from discarded materials. Products are sold direct-to-consumer online, through channel partners, and via corporate CSR bulk purchases.

Product overview

Watsan Envirotech offers a portfolio of natural water purification and sanitation solutions centered on its proprietary Terafil nano-technology. The core product line consists of gravity-based, electricity-free water purifiers including the WatSan Classic (15L), WatSan Prime (15L stainless steel), and WatSan Plus (50L) for household and community use. Specialized variants add arsenic removal (AMRIT technology) and fluoride removal (Fluorosorb technology) capabilities through add-on cartridges. The portable Wottle provides travel-friendly filtration, while the Water on Wheels (WOW) addresses water transportation needs in rural areas. Community-scale purifiers (50L-2500L) and Any Time Water (ATW) vending machines serve institutional and public needs. The sanitation line includes ready-to-fit modular toilets made from recycled materials. All products use nano-clay filtration candles that can be cleaned and reused indefinitely, eliminating cartridge replacement costs.

Differentiator

Problem solved

Functional benefit

Brands

• Terafil®™: Natural nano-filtration technology using clay and sand sintering, licensed by CSIR-IMMT. Used in all water purifier products.
• WOW (Water on Wheels)
• Wottle™
• ATW (Any Time Water)
• Fluorosorb™
• AMRIT™

Products and services

• WatSan Classic: 15 L Natural Terafil Water Purifier Lightweight, gravity-based household purifier using Terafil nano-filtration candles. 15L top + 15L bottom chamber, 5-10 litres/hour flow rate, 5-year warranty. Removes turbidity, bacteria, and heavy metals while retaining minerals.
• WatSan Prime: 15 L Stainless Steel Natural Terafil Water Purifier Premium stainless steel variant of the 15L household Terafil purifier. Rust-proof, 3-5 litres/hour flow rate, 3-year limited warranty.
• WatSan Plus: 50 L Natural Terafil Water Purifier High-capacity 50L shared-use purifier for hostels, schools, offices, and clinics. Gravity-based, 8-10 litres/hour flow rate, 5-year warranty.
• WatSan 15 L Fluoride Removal Terafil Water Purifier 15L household purifier with Fluorosorb-based fluoride removal. Includes 3 Terafil candles + 12 Fluorosorb cartridges, meets IS 10500 standards, 5-year warranty.
• WatSan 15 L Arsenic Removal Terafil Water Purifier 15L household purifier integrated with AMRIT nano-absorbent cartridges for arsenic removal. Meets IS 10500 standards, 5-year warranty.
• Wottle: Water on the Go! Portable Purifier Portable Terafil-based purifier for travelers. 500ml capacity, 350gm weight, purifies from taps, rivers, or ponds without electricity or chemicals. 5-year warranty.
• Watsan WOW – Water on Wheels 65L roller drum for water transportation, food-grade PP material, designed to ease water carrying for rural village women, 5-year warranty.
• Community Purifiers (50L, 200L, 500L, 2500L) Large-capacity Terafil purifiers for villages, schools, hospitals, and industries. Capacities from 50L to 2500L, gravity-based and non-electric.
• Any Time Water (ATW) Vending Machine Water vending machines delivering 24/7 clean drinking water in water-affected areas with zero wastage and minimal power, deployable as rural entrepreneur kiosks.
• Ready-to-Fit Modular Toilets Pre-fabricated modular monolithic sanitation units built from discarded materials. Installable in 2 days vs 15 days for RCC, eco-friendly, theft-proof, suited for rural households and schools.
• Terafil Replacement Candles Replacement filter candles for Terafil-based purifiers using clay and sand sintering nano-technology, cleanable and reusable.
• Fluoride Removal Cartridges Add-on cartridges with Fluorosorb nano-material (12 per kit, 2-year life) compatible with all Terafil candle-based Watsan purifiers.
• Arsenic Removal Cartridges Add-on cartridges with AMRIT nano-absorbent media (3 per kit, 2-year life) compatible with all Terafil candle-based Watsan purifiers.
• Hand Air Pump Maintenance accessory for cleaning Terafil candle spouts from the threaded side, lightweight and compact.
• Wall Mounting Stand for 15L Purifiers Wall mounting stand accessory for 15L household Terafil purifiers.

Quantifiable outcome

• 500,000+ families served across India with clean water
• +5 more outcomes

Named customers13 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered core.

• Peoples WASH Solution LLPcoreChannel Partner/ Reseller/ DistributorChannel partner working in water management and sanitation space for reaching out to tier 2/tier 3 towns and rural areas.
• ErasustaincoreChannel Partner/ Reseller/ DistributorChannel partner working in water management and sanitation space for reaching out to tier 2/tier 3 towns and rural areas.
• IMMT (CSIR) - Institute of Minerals and Materials TechnologycoreTechnology or IntegrationLicensing partnership for Terafil™ nano-filtration technology. Watsan holds exclusive license for manufacturing Terafil filter candles using clay and sand sintering technology.
• IIT Madras (AMRIT Team)coreTechnology or IntegrationCollaborative development of AMRIT™ nano-absorbent technology for arsenic removal. Watsan arsenic purifier cartridges developed using this technology.
• CIPET (Central Institute of Plastics & Engineering Technology)coreTechnology or IntegrationTechnology collaboration for designing and manufacturing container systems for water purifiers. CIPET-certified food-grade plastic containers.
• Rotary InternationalcoreGTM or Marketing PartnerNon-profit partner supporting WatSan for Schools mission to transform 10,000 Govt Schools in India with clean drinking water access.

Scale indicators9 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• Eureka Forbes (Aquaguard): India's largest water purifier brand, offering RO/UV/gravity-based household purifiers across income segments. Direct overlap with Watsan in the household water purification category, but with vastly larger distribution and brand spend.
• Kent RO: Leading Indian water purifier company with a deep RO/UV/UF product lineup for households. Comparable to Watsan on the household purification category; differentiates on technology (membrane-based vs. Watsan's gravity/clay media) and aspirational branding.
• Tata Swach: Tata group's low-cost, gravity-based water purifier brand built for price-sensitive Indian consumers. The closest peer to Watsan on positioning, distribution model (rural/low-income), and electricity-free technology paradigm.
• Piramal Sarvajal (Waterlife): Piramal-backed social enterprise delivering clean water to rural India via ATM-style water vending and household filtration. Comparable to Watsan on mission (rural BoP water access), channel (CSR/institutional) and pricing tier.

Emerging players

• WaterHealth International: Decentralized water treatment operator serving rural communities and institutions across India and other emerging markets. Comparable to Watsan's community purifier (50L–2500L) tier and institutional/government sales motion.
• Drinkwell: Mission-driven social enterprise deploying low-cost filtration solutions in rural/underserved Indian communities. Highly comparable to Watsan in target segment (rural BoP), use of CSR philanthropy channels, and gravity-based filtration ethos.
• Livpure: Indian water purifier and home appliance brand targeting the mid-range household segment with RO/UV products. Overlaps with Watsan on the household filtration category but lacks the rural/CSR focus.

Broad incumbents

• AO Smith India: US-headquartered water treatment major with established Indian operations across RO/UV household purifiers. Competes in the same household water purification category with broader industrial and commercial water exposure.
• Hindustan Unilever Pureit: Mass-market household water purifier brand from Hindustan Unilever with broad FMCG distribution across urban and semi-urban India. Competes with Watsan in the same household category but benefits from HUL's scale, advertising and retail reach.
• Whirlpool: Global appliance major with water purifier offerings in India as part of its broader home appliances portfolio. Adjacent incumbent competing in household purification but not specializing in rural/social water access.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/naturalfilter
• Facebookfacebook.com/WatsanWater
• LinkedInlinkedin.com/company/watsan-envirotech-private-limited
• Instagraminstagram.com/watsanwater

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds3 records

Investors3 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Watsan Envirotech