THAILANDSICThailand Standard Industrial Classification

TSIC Activity

36002

Treatment and supply services of water for household and industrial purposes

ผลิตและจำหน่ายน้ำสะอาด รวมทั้งดำเนินการการอื่นที่เกี่ยวเนื่องกัน

What this activity covers

Companies in this sector focus on improving and supplying water for household and industrial use.

  • Water quality improvement — Enhancing water quality for tap water production
  • Water supply operation — Managing water supply systems for households and industries
  • Water distribution — Distributing water through established supply systems
  • Production of tap water — Creating tap water for public consumption
  • Village water systems — Operating water supply systems in rural areas

What companies here also do

Seen in real company registrations under this code — beyond the official definition, so licensing may differ.

  • Water purification — Producing and selling water purification systems
  • Water resource management — Managing and producing water resources

Not included here

  • Water supply and distribution for agricultural use. See activity 36003.
  • Water supply and distribution by water trucks or other means. See activity 36009.
  • Wastewater treatment to prevent water pollution. See 37000 activities.

Industry at a glance

as of 23 ก.ค. 69

The whole registered industry under this activity, every registration year, from the DBD DataWarehouse.

227
active companies operate here
฿31.6Bregistered capital, combined
฿25.4B
Sector revenue · 2025
+17% since 2023
฿7.9B
Net profit · 2025
90 profitable
202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD
0%of new registered capital is foreign-held
฿0 foreign฿19.5M Thai

Almost entirely Thai-held — little foreign capital enters here.

New in 2026

10+233.3%

registrations, YTD

Registered capital

฿31.6B-0.3%

since year-end

Largest by registered capital

  1. 1Bright Blue Water International Corporation Co., Ltd.Bangkok฿6.0B
  2. 2TTW Public Company LimitedNakhon Pathom฿4.0B
  3. 3WHA Utilities and Power Public Company LimitedSamut Prakan฿3.8B

Source: Department of Business Development DataWarehouse. Financial figures are combined totals of companies that filed statements; revenue and profit shown for the latest three reporting years.

Companies registered since 2022

Browse all

New DBD registrations under this activity since 2022, the period the registry snapshot covers, not the full historical register.

48
Registered
since 2022
47
Still active
1
Dissolved
฿1.0M
Median capital
of active

New registrations per year

2022peak 15 in 20222026

Largest active companies by registered capital

Source: Department of Business Development (DBD) new-registration records, 2022 to present. Counts cover companies first registered in that window, reflect the latest snapshot load, and may lag the live register.

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