Is an STP mandatory for hotels in India?

Yes. Hotels above certain capacity thresholds, typically around 100 rooms depending on state regulations, are generally required to install and operate a Sewage Treatment Plant (STP) as part of environmental compliance requirements.

Can treated STP water be used for drinking?

No. Treated STP water is intended for non-potable uses such as toilet flushing, landscaping, and cooling tower makeup. Additional advanced treatment would be required before it could be considered for potable applications.

What is the difference between grey water and black water?

Grey water comes from showers, sinks, laundries, and similar sources and contains relatively low contamination levels. Black water originates from toilets and contains sewage, requiring more extensive treatment.

How much water can a hotel save through grey water reuse?

Hotels can typically reduce freshwater consumption by 40–60% by treating and reusing grey water for applications such as toilet flushing, landscaping, and irrigation.

Which STP technology is best for hotels?

The best technology depends on wastewater volume, available space, and reuse goals. MBR systems provide the highest treated water quality, MBBR systems offer a compact footprint, and SBR systems are a flexible solution for many hotel properties.

Hotel STP & Grey Water Reuse Guide India