Diggian Mohali Wastewater Treatment Plant, Kambala, Punjab

Diggian Mohali is a wastewater treatment plant located in Sector 66A, Kambala, in the Sahibzada Ajit Singh Nagar district of Punjab, India. The plant serves a population of around 99,000, placing it in the medium-to-large agglomeration category for Indian urban centers. It operates as part of the municipal infrastructure for the Mohali area, which is a rapidly growing suburban region near Chandigarh. As an operational facility in India, Diggian Mohali is subject to the national regulatory framework under the Water (Prevention and Control of Pollution) Act, 1974, and the Environment Protection Act, 1986. The Central Pollution Control Board (CPCB) and the Punjab State Pollution Control Board (PSPCB) oversee compliance with discharge standards. For a plant serving nearly 100,000 people, secondary treatment is typically required, and advanced treatment may be mandated if the receiving water body is in a sensitive area. The plant's treated effluent is discharged into local water bodies that eventually drain into the Ghaggar River system, which flows through Punjab and Haryana before entering Rajasthan. The Ghaggar is a seasonal river that supports agricultural irrigation and is ecologically important for groundwater recharge in the semi-arid region. Proper treatment at Diggian Mohali helps protect downstream water quality and public health.

The treated effluent from Diggian Mohali likely enters local drains that feed into the Ghaggar River basin. The Ghaggar River is a seasonal watercourse that flows through Punjab and Haryana, eventually dissipating in the Thar Desert in Rajasthan. This river system is critical for irrigation and groundwater recharge in the region, and its water quality is sensitive to pollution from urban and industrial sources. The plant's operation helps mitigate nutrient and pathogen loading, supporting the ecological health of downstream agricultural and riparian zones.