VATTEN
Dhaka
Delta water. Treated at the limit. The weight of 22 million.
Buriganga and Shitalakhya rivers (Saidabad Water Treatment Plant I & II), supplemented by deep groundwater wells (at progressively greater depth due to arsenic in shallow aquifers), managed by Dhaka Water Supply and Sewerage Authority (DWASA). Dhaka sits on the Bengal Delta — Holocene and Pleistocene alluvial sediments deposited by the Ganges-Brahmaputra-Meghna river system. The geology is characterised by alternating sand and clay layers. Shallow tube wells (below 40m) in this region commonly contain arsenic released from iron oxide reduction in reducing sedimentary conditions — a natural geochemical hazard affecting tens of millions across Bangladesh.
6.8°dH
Hardness
52 mg/L
Calcium
D
Political grade
8
Drug traces
Taste Profile
Delta water. Treated at the limit. The weight of 22 million.
Dhaka water is the product of the Bengal Delta — a flat, hot, densely packed landscape where every river carries the residue of a civilisation upstream. The Saidabad plant treats Shitalakhya River water that arrives pre-loaded with organic matter, industrial discharge from the textile industry, and the pharmaceutical signature of a mega-city. At point of production it is treated to a standard that meets WHO microbiological guidelines. What arrives at the tap — via a distribution network losing 30% of its volume — may be different. The arsenic reading of 4.2 μg/L reflects the Saidabad surface water source; tube wells in Dhaka peri-urban areas commonly exceed the WHO 10 μg/L limit.
Tasting notes
Body
Medium-full body
Hardness
Medium — 7–14°dH
Finish
Medium. Warm mineral persistence.
Pairs with
- —Hilsa fish curry
- —Panta bhat (fermented rice water)
- —Mishti doi
- —Biryani
Water Memory
The world's densest city drinking from a river it has also destroyed.
Dhaka is the most densely populated large city on earth — 44,000 people per square kilometre in the core. Its water comes primarily from the Buriganga and Shitalakhya rivers, both of which run through or alongside the city. The Buriganga, whose name means 'Old Ganges', was once a major trade artery and cultural waterway. It now carries tannery effluent, textile dye waste, and domestic sewage in such volumes that its dissolved oxygen is near zero for much of the year. The city drinks from rivers it has rendered ecologically dead.
“We give our river everything and it gives us nothing back. But what else would you call that except love?”
Buriganga River boatman, Sadarghat, 2023
Geological memory
The Bengal Delta is one of earth's great geological formations — the combined delta of the Ganges, Brahmaputra, and Meghna rivers, continuously deposited over millions of years. The alluvial sediments are rich and fertile above ground; below ground they are a complex stratigraphy of sand, silt, and clay layers containing both water and, at shallow depths, geogenic arsenic. The arsenic was deposited from Himalayan erosion and is released by iron-reducing bacteria in the anaerobic sediments. It is the largest mass poisoning in human history — affecting an estimated 40–70 million people across Bangladesh and West Bengal who rely on shallow tube wells.
Political memory
DWASA was restructured multiple times between 2000 and 2020 with World Bank assistance, improving financial management and technical capacity. Saidabad Phase I (launched 1999) and Phase II (2005) represented major treatment capacity increases. But coverage has not kept pace with population growth: an estimated 20–25% of Dhaka residents rely on unpiped sources, vendors, or shallow groundwater. The textile and leather industries that power Bangladesh's economy discharge into the rivers that supply its capital, and enforcement of industrial discharge standards remains chronically weak — a political calculation that treats export revenue as more important than water quality.
Cultural memory
The Buriganga River shaped the cultural and economic identity of historic Dhaka — the Mughal trading port of Jahangirnagar was established on its banks in 1608 specifically for its navigable depth. Dhaka's old city, Puran Dhaka, retains the density and street pattern of that original river port. During Eid al-Adha, the river banks fill with cattle and the water turns red; during Eid al-Fitr, the riverfront fills with families. The river is still culturally central to Dhaka life even as it has become environmentally uninhabitable.
Water Politics
Overall
Dhaka sits at the intersection of every water governance failure: industrial contamination of source rivers, geogenic arsenic in groundwater, distribution losses of 30%+, incomplete coverage of a rapidly growing mega-city population, and regulatory frameworks too weak to confront the industries that power the national economy. DWASA has improved over the past decade but starts from a very low baseline.
Failures
- ×Buriganga and Turag rivers biologically dead from tannery and textile discharge — primary source water severely compromised
- ×30–35% non-revenue water loss through leakage and illegal connections
- ×20–25% of Dhaka residents lack access to piped water supply
- ×Arsenic in peri-urban shallow tube wells commonly exceeds WHO 10 μg/L limit
- ×Industrial discharge standards weakly enforced — tanneries relocated from Hazaribagh to Savar but violations continue
- ×Pharmaceutical contamination among highest of any tested megacity water supply
- ×Microplastic loading 8.4 particles/L — highest in VATTEN dataset
Achievements
- ✓Saidabad Phase I & II treatment plants achieve WHO microbiological compliance at point of production
- ✓DWASA 2020 restructuring improved billing recovery and reduced non-revenue water from 45% to 32%
- ✓World Bank-funded Dhaka Environmentally Sustainable Water Supply project expanding arsenic-safe deep well network
- ✓BCSIR laboratory provides independent water quality monitoring with published annual data
- ✓Hazaribagh tannery relocation (2017) reduced direct Buriganga discharge — partial improvement to source water
What Dhaka must do
Mandate binding zero-discharge standards for all Dhaka River basin industries with criminal liability for directors. Fund universal piped supply to all Dhaka sub-districts by 2030. Expand arsenic-safe deep aquifer network with mandatory testing. Reduce non-revenue water to below 20% with metered connections. Establish independent river water quality regulator outside Ministry control.