Overview
On Nut Sewage Treatment Works is an operational municipal wastewater facility serving the Bangkok area of Thailand. It discharges treated effluent into local waterways that flow toward the Gulf of Thailand.
On Nut Sewage Treatment Works is an operational municipal wastewater facility located in the Bangkok metropolitan area of Thailand. It serves as part of the city's essential water infrastructure, managing wastewater from residential and commercial sources in the densely populated eastern districts. As a plant in Thailand, it operates under the national regulatory framework administered by the Pollution Control Department (PCD), which sets effluent standards under the Enhancement and Conservation of National Environmental Quality Act. For large urban agglomerations like Bangkok, secondary treatment is typically required, with some facilities incorporating nutrient removal to protect sensitive receiving waters. The treated effluent from the plant ultimately drains into the Chao Phraya River basin, which flows southward into the Gulf of Thailand. This coastal discharge zone supports diverse marine and estuarine ecosystems, including mangrove forests and fisheries that are ecologically and economically important for the region.
Environmental context
The plant's treated effluent enters the Chao Phraya River system, which flows through Bangkok and discharges into the Gulf of Thailand. The Gulf's coastal waters support productive fisheries, mangrove habitats, and migratory bird populations. Nutrient loading from urban wastewater can contribute to eutrophication in the inner Gulf, making effective treatment critical for maintaining water quality and ecosystem health.
Frequently asked questions
On Nut Sewage Treatment Works is located in the On Nut area of eastern Bangkok, Thailand, within the Chao Phraya River basin.
The plant is operational and serves as part of Bangkok's municipal wastewater infrastructure.
The treated effluent is discharged into local waterways that flow into the Chao Phraya River, which ultimately reaches the Gulf of Thailand.
The plant operates under Thailand's Enhancement and Conservation of National Environmental Quality Act, enforced by the Pollution Control Department (PCD), which sets effluent standards for municipal wastewater.
For large urban areas like Bangkok, secondary treatment is standard, with some facilities incorporating nutrient removal to protect sensitive coastal waters in the Gulf of Thailand.
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