Chandigarh, March 10 -- Residents of Sector 27 have raised concerns over the irregular supply of tertiary water, saying frequent pipeline repairs and prolonged disruptions have left parks, green belts and lawns in private residences without adequate watering for months.

Tertiary water, which is treated wastewater used for irrigating lawns, gardens and roundabouts, was introduced by the Chandigarh Municipal Corporation a few years ago to reduce the use of potable water for horticulture. Separate pipelines were laid across several sectors, and residents with lawns were encouraged, and in many cases required, to install tertiary water connections.

However, residents say the system has been plagued by frequent pipeline bursts and erratic su...