Water infrastructure: storage, conveyance, treatment and reuse assets built to code.

Crack control. Water-retaining concrete is designed and detailed for limited crack width: richer mixes, greater cover, controlled construction joints with waterstops, planned pour sequences and proper curing. A structure built to general building practice and then waterproofed from inside is the standard route to a tank that seeps for its whole life.

Tanks and pipelines are hydrostatically tested to a specified pressure and held for a specified duration with permitted loss limits, and a potable system is then disinfected and flushed, with water quality confirmed against IS 10500 before it is put into service. Commissioning without documented testing and disinfection is not commissioning.

Physically separate piping, distinct colour coding and permanent labelling, separate storage, and outlets marked as non-potable, with no cross-connection anywhere in the system. The risk being managed is not aesthetic; a cross-connection between treated recycled water and a potable line is a direct public health hazard.

Demand, population or occupancy and consumption norms: plus the reliability of the supply source, fire-fighting storage requirements, and the pumping head and duty the layout imposes. CPHEEO manual practice provides the design basis. Sizing on an assumed occupancy that later changes is why so many systems run either starved or grossly oversized.

Yes, and it is the reason many stop working. Recharge pits and trenches silt up, filter media clog, and inlet channels collect debris; without periodic desilting and media replacement, infiltration falls away within a few seasons. A recharge structure is a maintained asset, not a one-time construction item, and the maintenance schedule should be handed over with it.

It depends on the asset. Sewage treatment plants operate under State Pollution Control Board consent with conditions on effluent quality and monitoring; groundwater abstraction may require approval from the relevant groundwater authority; and many municipal bye-laws mandate rainwater harvesting and recycled water reuse for buildings above a stated size. The applicable set should be confirmed for the specific site.

The owner, through an operation and maintenance arrangement: pumps, valves, treatment units and recharge structures all need scheduled attention. Handover should include as-built drawings, valve and chamber locations, testing and disinfection records, equipment manuals and a maintenance schedule, since a buried network without accurate as-builts becomes very expensive to operate.