BIS ISI Certification for RO Water Purifiers in India (IS 16240:2023)

India is one of the world's largest markets for household RO water purifiers. It is also one of the few markets that regulates them for both water quality and water wastage. RO systems reject a large share of their inlet water, so the rules for this category came out of environmental concerns as well as consumer safety.

The product standard is IS 16240:2023 — Reverse Osmosis Based Point of Use Water Treatment System for Drinking Purposes, and BIS lists the category under Scheme-I (ISI mark). It covers under-sink, wall-mounted and countertop RO units, including models that combine RO with UV, UF or mineral cartridges.

🛡️ What Is BIS ISI (Scheme-I) Certification?

BIS Scheme-I is the ISI mark scheme under the BIS (Conformity Assessment) Regulations, 2018. Unlike the Compulsory Registration Scheme (CRS) for electronics, where a lab report supports a registration, ISI certification is a licence granted to a specific factory after product testing and a physical inspection of the manufacturing and testing facilities. After grant, the licensee marks every unit with the ISI mark and its CM/L licence number and stays under BIS surveillance (market and factory samples).

For RO-based point-of-use water purifiers, that means the licence belongs to the factory that actually makes the product. Brand owners and importers cannot hold it in their own name for goods made elsewhere. See our ISI vs Standard Mark vs CRS comparison for how the schemes differ.

📜 The Governing Order & Amendments

1. Environment (Protection) 115th Amendment Rules, 2021 — Water Purification SystemG.S.R. 724(E) dated 4 October 2021
2. Water Purification System (Regulation of Use) Rules, 2023G.S.R. 833(E) dated 10 November 2023

Because the mandate sits in rules under the Environment (Protection) Act, these rules also deal with how and where RO systems may be used and with reject-water management, alongside product conformity. Read the current notification text for the obligations that apply to manufacturers, importers and sellers of your model.

📘 Indian Standard Covered (1)

The complete list of Indian standard BIS lists for this category under Scheme-I:

🔬 What BIS Testing Verifies for Ro Water Purifiers

Testing is carried out at a BIS-recognised laboratory (or under BIS supervision), and the same parameters are re-checked during surveillance. The key areas for RO-based point-of-use water purifiers:

🧭 Step-by-Step ISI Licensing Process

1. Scope & standard mappingConfirm every model is within the QCO, map it to its IS number and current edition, and group models into a series for testing.
2. Set up in-house testingInstall the equipment and trained staff needed for the routine tests in the BIS Scheme of Testing & Inspection (STI) for the standard.
3. Product testingGet representative samples tested against the full standard at a BIS-recognised lab and draw a complete test report.
4. Online applicationIndian factories apply on Manakonline. Foreign factories apply under FMCS, which went online in June 2026, with an Authorised Indian Representative. Pay the application and processing fees.
5. Factory inspectionA BIS officer audits production, raw-material control and in-house testing, witnesses tests and draws samples. Use our factory audit checklist to prepare.
6. Licence grantOn satisfactory results, BIS grants the licence (CM/L number). Foreign manufacturers also furnish the performance bank guarantee required under FMCS.
7. Marking & surveillanceApply the ISI mark with the CM/L number, pay the annual marking fee, keep test records, and renew the licence before expiry.

🗂️ Documents Required

Standard dossier (every ISI application):

• Factory registration / incorporation documents and address proof of the manufacturing premises
• Manufacturing process flow chart and list of outsourced processes (if any)
• List of production machinery and in-house test equipment, with calibration certificates
• Details and qualifications of the quality-control in-charge
• Product test report from a BIS-recognised laboratory
• Factory layout, location map, and the proposed ISI marking / label artwork
• For foreign factories: AIR nomination and undertaking, and trademark / brand authorisation where applicable

Specific to RO-based point-of-use water purifiers:

• Model list with rated purified-water output, storage tank capacity, stages (RO / UV / UF / mineral) and inlet TDS range
• Membrane and cartridge datasheets with supplier names and part numbers
• Food-grade / drinking-water contact declarations for the wetted materials
• Flow diagram showing inlet, reject and product water lines and any reject-water recovery arrangement

⏱️ Timeline & Validity at a Glance

Timelines depend mainly on how complete the first file is and how quickly the factory inspection can be scheduled. For foreign factories, inspection scheduling and officer travel usually decide the overall timeline. Every BIS query adds time, so a clean, complete first submission is the biggest lever you have.

⚠️ Common Mistakes That Delay a Ro Water Purifier Licence

• Old-edition test reports — Testing to IS 16240:2015 after the 2023 edition took effect.
• Overclaiming — Advertising contaminant removal (such as virus or heavy-metal claims) that the tested model never demonstrated.
• Changing the membrane supplier — A different membrane changes recovery and TDS performance, so it can need re-testing and a licence update.
• Ignoring use-restrictions — Missing the installation and use conditions in the 2023 Rules in the product's marking and manual.

❓ Frequently Asked Questions

🏆 Why Choose Global Approbation

Since 1997 we have managed BIS ISI, CRS, BEE, WPC and EPR approvals for Indian manufacturers and for overseas factories exporting to India. For RO-based point-of-use water purifiers we handle standard mapping, lab coordination, the Manakonline or FMCS application, AIR services for foreign factories, factory-audit preparation and post-licence surveillance support, all through a single point of contact.