Dhaka rivers in Eid time and pollution in general including other parts of the world

A:

Yes, this can be confirmed. The drone footage in the post shows streets in Bangladesh (likely Dhaka or a similar urban area) flooded with reddish water that is blood from animal sacrifices during Eid al-Adha (also called Bakrid or Qurbani in South Asia), mixed with rainwater.27

Eid al-Adha 2026 fell around May 27–30, with mass livestock sacrifices (goats, cows, sheep, etc.) taking place across Bangladesh—estimates run to around 10+ million animals nationwide this year, many slaughtered in streets, alleys, garages, or near homes rather than solely at designated sites. Bangladesh has poor drainage infrastructure in many older neighborhoods, so heavy rain (common during the monsoon season) quickly mixes blood, offal, and waste into visible red floodwater. This exact phenomenon has been documented repeatedly in Dhaka for years when rain coincides with the festival.2

The video itself is a short drone shot (about 11 seconds) of flooded streets with deep red liquid rippling around poles, wires, shop signs (in Bengali script), buildings, and some greenery. On-screen text/subtitles explicitly describe it as “the streets of Bangladesh” with “blood mixed with rainwater.” No signs of fabrication or old recycled footage appear here—the post went up on May 28, 2026, right after the main sacrifice day, and the scene aligns with current conditions.0

This is a recurring issue tied to open or semi-open slaughter practices and urban flooding, not an isolated or staged event. Similar visuals from past Eid al-Adha celebrations in Dhaka (e.g., 2016) were widely reported by outlets like BBC, ABC News, and others for the same reasons.14 Local authorities often designate slaughter spots to manage waste, but many people still sacrifice nearby for convenience, and rain overwhelms the system.

The post’s comment about PETA is opinionated (PETA does criticize animal sacrifice during Eid and promotes alternatives), but the core visual claim about the blood-water mix from Qurbani holds up. No credible debunkings or alternative explanations (e.g., dye, industrial waste) have surfaced for this specific footage.

Q: How much time it takes to clear this when it rains?

A:

It typically takes hours to 1 day for the floodwater itself to recede once the rain stops, but visible reddish staining, blood residues, and scattered waste can linger for a few days.0

This is based on how Dhaka’s drainage system (which is chronically poor and easily overwhelmed during monsoon rains) handles the mix of blood, offal, and rainwater from street or alley sacrifices. The liquid “rivers of blood” are mostly diluted blood flowing into low-lying streets and drains — not a permanent flood. In the well-documented 2016 case (identical conditions: heavy rain right after mass Qurbani), the standing red water had mostly drained by the next morning, though roads still showed a reddish hue and bits of entrails until further cleanup.24

2026 specifics (Eid al-Adha fell on May 27–28)

Dhaka South City Corporation (DSCC) and North City Corporation deployed over 13,000 sanitation workers and thousands of vehicles with a public target of removing all sacrificial animal waste within 8 hours on the main Eid day (operations starting midday and aiming to finish by ~9:30 pm). They prepared for ~15,900 tonnes of waste on day one alone across the three-day festival.40

This rapid solid-waste plan (carcasses, hides, bones, etc.) helps prevent additional buildup, but it doesn’t instantly fix blood already mixed into rainwater or the drainage bottlenecks. No widespread 2026 post-rain reports yet (the drone footage you shared is from the peak of the event on May 28), but historical patterns and officials’ own past statements show the blood-tinged water clears in 1–3 days total once rain eases and crews hose down or sweep the streets.0

In short: the dramatic red flooding you see in the video usually disappears as standing water drains overnight or within a day, but streets may stay pinkish or require extra cleaning for another day or two. Authorities have improved response times in recent years, but Dhaka’s infrastructure means heavy rain + sacrifices = temporary mess every time it coincides.

Q: Can you compare with pollution of rivers in other major rivers and are they episodic like this or year long with daily pouring of filth?

A:The Eid al-Adha sacrifice-related blood and waste in Dhaka’s streets (and the drains/rivers it flows into) is a clear example of episodic pollution—a short, intense spike that lasts days and then largely clears—while pollution in major rivers like Bangladesh’s Buriganga, India’s Ganges and Yamuna, or Indonesia’s Citarum is overwhelmingly chronic and year-round, driven by daily untreated sewage, industrial effluents, and household waste.23

How the Eid waste reaches rivers and how long it lasts

In Dhaka, street blood/offal from Qurbani mixes with rainwater and drains into the city’s canal network, which feeds directly into the Buriganga River. Authorities remove most solid waste (carcasses, hides, bones) within hours to a day using thousands of workers, and the visible red floodwater recedes in 1–3 days once rain stops. The organic load (blood, rumen contents) adds a temporary spike in biochemical oxygen demand (BOD) and nutrients, but it is not a permanent or dominant input.14

Buriganga River (Dhaka, Bangladesh) – mostly chronic daily filth

This is the river most directly affected by the Eid scenes you referenced. It is routinely ranked among the world’s most polluted:

• Daily/continuous sources (the vast majority of the problem): Dhaka dumps ~4,500 tonnes of solid waste per day; tanneries alone release 21,600 cubic metres of toxic chemical waste daily; ~80% of the city’s sewage is untreated; plus textiles, medical waste, plastics, and household filth flow in constantly.18
• The river is often described as “biologically dead” or “black,” with no fish in stretches, high heavy metals, and low oxygen year-round.
• Eid waste adds an extra organic pulse once a year, but it is dwarfed by the constant industrial and sewage load. The baseline pollution is perpetual, not event-driven.25

Comparison to other major rivers

Most of the world’s heavily polluted major rivers follow the same pattern: chronic daily pouring of filth far outweighs any episodic events.

• Ganges and Yamuna (India): These are chronically polluted by untreated sewage (Delhi alone contributes ~3,600 million litres per day, with large portions untreated) and industrial discharges. The Yamuna stretch through Delhi is often “dead” (zero dissolved oxygen, faecal coliform millions of times above safe limits) year-round. Episodic spikes do occur—e.g., during Kumbh Mela mass bathing, Ganesha idol immersions, or other festivals—but these are temporary additions on top of the constant sewage/industrial baseline. Monsoon runoff can temporarily worsen or dilute it, but the filth is daily and structural.29
• Citarum River (Indonesia): Often called one of the world’s most polluted. ~20,000 tonnes of waste + 340,000 tonnes of wastewater pour in every single day from 2,000+ textile factories, households, and agriculture. The river is visibly choked with garbage and coloured by toxic dyes year-round—no episodic “event” needed; it is a continuous industrial sewer.46
• Broader global pattern (other heavily polluted rivers in Asia and elsewhere): Rivers like the Yellow (China), Marilao (Philippines), or Ravi (Pakistan) are dominated by ongoing sewage, industrial, and agricultural runoff. Episodic events (oil spills, festival waste, or heavy rains) create visible spikes or fish kills, but the rivers are already filthy 365 days a year due to poor waste treatment infrastructure in densely populated, rapidly industrialising regions.36

In developed-country rivers (e.g., post-cleanup Thames in the UK or regulated stretches of the Mississippi), pollution is much lower overall and more episodic (storm overflows, occasional agricultural runoff spikes), but still has chronic elements from diffuse sources.

Bottom line: The dramatic red streets during Eid are a striking, one-time-per-year event that temporarily worsens river conditions in Dhaka. But in the Buriganga and similar major rivers across South and Southeast Asia, the real, ongoing crisis is the daily, unrelenting discharge of sewage and industrial waste—far larger in volume and persistence than any festival-related pulse. Cleanup efforts focus more on fixing the year-round sources (treatment plants, enforcement) than on episodic events.