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Industry Code 3600 for Water Collection, Treatment, and Supply, updated according to Decision 36/2025/QĐ-TTg. To learn more about the details of industry code 3600, please refer to this article by VN Law Firm!

1. What is an Industry Business Code?

Industry business code is a sequence of numbers encoded to represent a specific business industry. Organizations and individuals, when preparing business registration documents, must use this business industry code table for registration. The 4-digit (level 4) industry code is the one used for business registration.

The Vietnam Standard Industrial Classification (VSIC) system, issued under Decision 36/2025/QD-TTg, has a hierarchical structure with 5 levels, from general to specific:

Level	Name	Code	Quantity
Level 1	Economic industry level 1	1 letter (from A to V)	22 industries
Level 2	Economic industry level 2	2 digits (following level 1)	87 industries
Level 3	Economic industry level 3	3 digits (following level 2)	259 industries
Level 4	Economic industry level 4	4 digits (following level 3)	495 industries
Level 5	Economic industry level 5	5 digits (following level 4)	743 industries

Example of industry code structure: Taking the food manufacturing industry as an example:

Level 1: C (Manufacturing)
Level 2: 10 (Manufacture of food products)
Level 3: 107 (Manufacture of other food products)
Level 4: 1075 (Manufacture of prepared meals and dishes)
Level 5: 10751 (Manufacture of prepared meals and dishes from meat)

2. Regulations on Industry Code 3600 for Water Collection, Treatment, and Supply

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply

Industry Code 3600 Water Collection, Treatment and Supply

This industry includes:

– Collection of water from rivers, lakes, ponds, groundwater, etc.;

– Rainwater collection;

– Water treatment for supply;

– Water treatment for industrial and other purposes;

– Desalination of brackish and sea water to produce water as the main product;

– Water supply through pipelines, by water tankers, or other means;

This industry also includes:

– Operation of irrigation canals;

– Leasing of water supply systems.

Excludes:

– Operation of irrigation systems and irrigation equipment for agricultural purposes is classified under group 01610 (Support activities for crop production);

– Wastewater treatment to prevent pollution is classified under group 3700 (Sewerage and wastewater treatment);

– Transport of water via pipelines (long-distance) is classified under group 49400 (Pipeline transport);

– Manufacture of natural mineral water and other bottled water is classified under group 11051 (Manufacture of mineral water, bottled purified water);

– Installation of water meters is classified under group 43221 (Installation of water supply and drainage systems);

– Water meter reading by third parties is classified under group 82990 (Other business support service activities n.e.c.).

Industry code 3600 Water collection, treatment and supply

3. Suggestions for recording Industry Code 3600 for Water Collection, Treatment, and Supply

– When registering for business establishment, when notifying changes to business lines, or when requesting a change to a Business Registration Certificate, the enterprise founder or enterprise selects a level-four economic industry from the Vietnam Standard Industrial Classification to record the business line in the enterprise registration dossier. The business registration agency guides, cross-references, and records the enterprise’s business lines in the National Enterprise Registration Database.

– For conditional business lines stipulated in other legal documents, the business line shall be recorded according to the regulations in those legal documents.

Suggestions for recording Industry Code 3600 for Water Collection, Treatment, and Supply:

Case 1: General

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply

Case 2: Detailed

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply Detail: Supply of domestic water in rural areas.

Case 3: Detailed

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply Detail: Collection, treatment, and supply of clean water in rural areas

Case 4: Detailed

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply Detail: Business of domestic water

Case 5: Detailed

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply Detail: Supply of domestic water in rural areas (The enterprise only conducts business activities when it meets the conditions prescribed by law)

Case 6: Detailed

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply (including fresh water supply for domestic use)

Case 7: Detailed

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply Detail: Clean water supply.

Case 8: Detailed

Industry Code	Industry Name
3600	Water Collection, Treatment and Supply Detail: – Water supply and drainage for aquaculture, production of clean water for industry, agriculture, and urban areas; – Water supply and drainage for rural and urban areas; – Management and operation of irrigation, drainage, and sewerage systems serving residential, industrial, and urban areas;

Note: Depending on each specific industry and business line, as well as specific regulations in each locality, it may be necessary to provide detailed information for the 4-digit industry code or commit to operating in accordance with regulations.

4. Business Line Change Services for Companies and Enterprises at VN Law Firm

Business line change services for companies and enterprises at VN Law Firm help clients save a lot of time and effort. With VN Law Firm, you will be provided with business line change services for companies and enterprises, including:

Consulting on the process and procedures for changing and adding business lines;
Advising clients on preparing necessary documents;
Drafting and submitting on behalf of clients the dossier for changing and adding business lines of the company/enterprise at the Business Registration Office;
Monitoring the dossier, supplementing or correcting the dossier (if any) as requested by the specialist;
Performing procedures for publicizing enterprise registration information on the Information Portal;
Delivering the certificate of business line change;
Guiding clients on necessary procedures to note after changing business lines…