Thailand Water Utilities Market Intelligence
Thai water: MWA, PWA state municipal, TTW, EASTW, BEM listed concessions, industrial. ~THB 100B+ sector; climate, drought, EEC industrial demand drive cycle.
Key takeaways
- 1
Thai water sector ~+ annual revenue: municipal retail (MWA, PWA ~), industrial (EEC, industrial estates ~), wastewater/sewerage (~), raw/bulk water (~).
- 2
State operators: Metropolitan Waterworks Authority (MWA, Bangkok, Nonthaburi, Samut Prakan), Provincial Waterworks Authority (PWA, all other provinces). Together ~ of sector by revenue.
- 3
Listed private concessionaires: TTW (Thai Tap Water, PWA concessionaire for Nonthaburi, Samut Sakhon); EASTW (East Water, EEC Eastern Seaboard raw water); BEM Water (ancillary concession).
- 4
Raw water, allocation: Royal Irrigation Department, Department of Water Resources, Office of National Water Resources manage dams, rivers, canals; Water Resources Act 2018 framework.
- 5
Drivers: climate, drought cycle (El Nino 2023-2024 stressed reservoirs), EEC industrial demand growth, wastewater treatment expansion, concession renewal dynamics.
Executive summary
Thailand's water utilities sector generates approximately + in annual revenue across municipal retail, industrial, wastewater, and raw/bulk segments. Two state enterprises dominate municipal retail: Metropolitan Waterworks Authority (MWA) covers Bangkok, Nonthaburi, Samut Prakan, while Provincial Waterworks Authority (PWA) covers all other provinces. Together they account for ~ of sector revenue.[, ]
Listed private concessionaires: Thai Tap Water Supply (SET: TTW, ~ revenue combined with subsidiaries) is the largest; operates PWA concession for Nonthaburi, Samut Sakhon. East Water (SET: EASTW) supplies raw water to Eastern Economic Corridor (EEC), Eastern Seaboard industrial estates β major industrial-water exposure. BEM (SET: BEM) has smaller ancillary water-supply concession. Industrial estate operators (WHA, Amata, Rojana) operate captive water treatment, supply within estates.[, , ]
Raw water, allocation is managed by Royal Irrigation Department (dams, canals, irrigation), Department of Water Resources (planning, basin management), and Office of the National Water Resources (ONWR, coordination across ministries). The Water Resources Act B.E. 2561 (2018) is the core regulatory framework covering allocation, pricing, basin management, industrial licensing. Key cycle drivers: (i) El Nino / La Nina climate, drought/flood cycle; (ii) EEC industrial demand growth; (iii) wastewater treatment expansion; (iv) concession renewal economics.[, , , , ]
Thai water sector revenue trend (THB billion, 2020-2024)
2020
Sector Revenue (THB B)
85
Context
COVID trough; industrial demand weak
2021
Sector Revenue (THB B)
90
Context
Partial recovery
2022
Sector Revenue (THB B)
95
Context
Post-COVID, EEC growth
2023
Sector Revenue (THB B)
100
Context
El Nino drought stressed reservoirs
2024
Sector Revenue (THB B)
105
Context
EEC industrial demand, concession growth
| Year | Sector Revenue (THB B) | Context |
|---|---|---|
| 2020 | 85 | COVID trough; industrial demand weak |
| 2021 | 90 | Partial recovery |
| 2022 | 95 | Post-COVID, EEC growth |
| 2023 | 100 | El Nino drought stressed reservoirs |
| 2024 | 105 | EEC industrial demand, concession growth |
Sector segment mix (% of FY2024 revenue)
Municipal retail (MWA, PWA)
Share %
Notes
Regulated-tariff retail water
Industrial (EEC, estates)
Share %
Notes
Higher-margin industrial water
Wastewater, sewerage
Share %
Notes
Largely Bangkok, major cities
| Segment | Share % | Notes |
|---|---|---|
| Municipal retail (MWA, PWA) | 55% | Regulated-tariff retail water |
| Industrial (EEC, estates) | 25% | Higher-margin industrial water |
| Wastewater, sewerage | 10% | Largely Bangkok, major cities |
| Raw, bulk water | 10% | EASTW, Royal Irrigation supply |
Analyst framing
Why this report
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Key figures
Selected anchors from the report evidence pack.
Metropolitan Waterworks Authority (MWA) Service Connections
MWA Annual Report, Ministry of Interior
Provincial Waterworks Authority (PWA) Service Coverage
PWA Annual Report, ONWR Thailand
Eastern Water Resources Development (EASTW) Annual Revenue
EASTW Annual Report, SET filings
EEC Industrial Water Demand Forecast (2030)
EEC Office, ONWR, EASTW investor presentations
Thailand Non-Revenue Water (NRW) Rate
MWA Annual Report, PWA Annual Report, ONWR 20-Year Water Plan
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