Month: November 2025

Why NYC Flooded So Badly on October 30, 2025

Why NYC Flooded So Badly on October 30, 2025

Why NYC Flooded So Badly on October 30, 2025

11/03/2025

“Why did NYC flood so badly on October 30, 2025?”

October 30, 2025, was a nightmare for NYC. Record-breaking downpours swept through the city, leaving destruction in its wake. Water levels were taller than people’s waists on some streets. Two people even lost their lives because of the storm. But why was flooding so bad? Well, there’s a multitude of reasons. NYC sewer systems were designed to handle around 1.75 inches per hour of rainfall, while rain reached 6.00 inches per hour in some neighborhoods. Furthermore, the fall leaves and trash blocked sewer catch-basins, preventing drainage and turning city regions into a giant concrete bathtub. Taken together, This is Why NYC Flooded So Badly on October 30, 2025.

For more in-depth information, please visit this page from the NYC-focused flooding blog The City Sponge.

Image credit: https://cloudfront-us-east-2.images.arcpublishing.com/

Soluble BOD

Soluble BOD

Soluble BOD

11/02/25

“How can we describe the portion of organic material that dissolves in water?”

BOD measures the amount of oxygen required to consume the organic matter present in a water sample. Some of the organic material, such as large chunks of food, is suspended and visible, while others are dissolved in the water itself. We can measure the BOD needed to consume the latter as Soluble BOD. Soluble BOD is easier to manage than the more visible, suspended, particulate BOD because of its smaller size.

Sludge Conditioning

Sludge Conditioning

Sludge Conditioning

11/01/25

“Why do we need to pretreat sludge before separating the water from the solids?”

Sludge is a mixture of solid waste and water. Sludge is processed by separating the solid waste from the water. However, sludge will require pre-treatment called Sludge Conditioning before dewatering to ensure successful processing. Sludge conditioning comes in numerous forms, ranging from aerobic digestion to thermal conditioning.

Image credit: https://www.waterexchemicals.com/