ADOPT POLICIES FOR REUSE OF TREATED WATER

 ADOPT POLICIES FOR REUSE OF TREATED WATER (TH)

 

GS Paper III — Conservation, Environmental Pollution & Degradation,  

Environmental Impact Assessment, Water Resource Management.

 

Introduction

 

India faces severe water stress from rapid urbanization, climate variability, and unsustainable groundwater extraction. While flagship schemes like AMRUT expanded Sewage Treatment Plant (STP) capacities, a key gap persists: most treated effluent is discharged unused into drains rather than reclaimed. To bridge this, state initiatives (e.g., Uttar Pradesh and Uttarakhand) align with the National Framework on Safe Reuse of Treated Water (SRTW), 2022, shifting focus from capacity creation to practice, turning wastewater into a climate-resilient economic asset.

 The Resource Recovery Imperative: Turning Wastewater into Wealth

1.       Drought-Proof Water Security: Unlike rainfall-dependent surface water or depleting aquifers, wastewater generation is continuous and predictable. Utilizing recycled water builds climate resilience for water-stressed urban areas.

Ø  Example: Chennai uses TTRO facilities to turn municipal sewage into a constant, weather-independent supply of industrial-grade water. This guarantees a stable water supply even during severe dry spells  and monsoon failures.

2.     Relieving Pressure on Freshwater Sources: Diverting treated effluent to non-potable uses such as industrial cooling, thermal power plants, construction, and urban landscaping reserves high-quality freshwater for drinking and domestic needs.

Ø  Example: The Nagpur Municipal Corporation treats urban sewage and sells millions of litters per day to the Mahagenco thermal power plant for cooling. Reusing this wastewater frees up equivalent volumes of fresh river and reservoir water for city residents.

3.     Circular Economy Principles: Wastewater contains valuable nutrients (nitrogen and phosphorus) and organic matter. When safely treated, it offers agricultural benefits by reducing chemical fertilizer requirements and improving soil health.

Ø  Example: The Bengaluru–Kolar Wastewater & Fertigation Project. Secondary-treated wastewater from Bengaluru is piped to the drought-prone Kolar region to fill irrigation tanks and recharge aquifers. Rich in organic nutrients, the recycled water reduces farmers' reliance on chemical fertilizers and improves crop yields.

4.     Low-Carbon Urban Development: Local reuse minimizes energy-intensive, long-distance water pumping and lowers the overall carbon footprint of municipal water management systems.

Ø  Example: Surat treats domestic sewage within city limits and pipes it directly to the nearby Pandesara Industrial Estate. Reusing water locally eliminates the need to pump fresh water across vast distances, significantly cutting electricity consumption and operational carbon emissions.

Strategic Architectures & Governance Models

1.       Fit-for-Purpose Reuse: Modern policies mandate treating wastewater to specific quality thresholds matching its intended use (e.g., secondary-treated water for industrial cooling vs. tertiary-treated water for agriculture), avoiding unnecessary purification costs.

Ø  Example: In Nagpur, Maharashtra, the city treats sewage to secondary/tertiary standards and sells 130 million litters per day (MLD) to the Mahagenco thermal power plant for cooling, saving high-grade freshwater for drinking and domestic use.

2.     National Framework on Safe Reuse of Treated Water (SRTW), 2022: Promotes localized policy implementation while providing nationwide guidelines on water quality standards, health risk management, and governance models.

Ø  Example: The Namami Gange Mission applies these nationwide SRTW guidelines to fund and construct standardized Sewage Treatment Plants (STPs) across river-basin cities, setting clear quality targets for urban non-potable reuse.

3.     De-centralized & Contextualized Policies: Recent state policies (e.g., UP and Uttarakhand) depart from standard templates by separating the requirements of hill ecology from densely populated plains and integrating reuse targets with urban planning and river rejuvenation.

Ø  Example: Uttarakhand's SRTW policy focuses on eco-sensitive hill terrain by prioritizing localized, decentralized treatment to prevent run-off into fragile rivers, whereas Uttar Pradesh's policy targets dense plains by connecting treated water directly to thermal power plants (like the Panki plant in Kanpur) and urban planning.

4.     Regulatory & Statutory Links: Statutory provisions under the Water (Prevention and Control of Pollution) Act, 1974 and discharge standards under the Environment (Protection) Act, 1986 serve as the baseline for enforcing effluent compliance before reuse.

Ø  Example: The Central Pollution Control Board (CPCB) and State Boards use Environment (Protection) Act standards (e.g., keeping Biochemical Oxygen Demand below 10 mg/L to grant "Consent to Operate" under the Water Act, 1974; factories and STPs that fail these baseline standards are shut down before they can release or reuse water.

 

Architectural Bottlenecks & Execution Hurdles

1.       Institutional Silos: Water management is fragmented across municipal utilities, state irrigation departments, industrial development corporations, and pollution control boards, leading to poor inter-departmental synergy.

Ø  Example: In Delhi, the Delhi Jal Board (DJB) manages municipal sewage, the Delhi Development Authority (DDA) controls public parks, and the Irrigation and Flood Control Department handles waterways. A lack of coordinated planning between them leaves hundreds of millions of litters of treated sewage dumped directly into the Yamuna daily instead of being routed to park irrigation.

2.     Lack of Economic & Price Signals: Freshwater for industrial and agricultural use is frequently subsidized, making treated wastewater economically uncompetitive without corrective pricing mechanisms or mandatory offtake quotas.

Ø  Example: In many industrial hubs across India, state development corporations provide raw surface water to manufacturing units at heavily subsidized rates. Consequently, fresh water remains cheaper than high-tech tertiary-treated wastewater, leaving industries with no financial incentive to switch to recycled options.

3.     Absence of Mandatory Targets: The SRTW framework offers guidance but lacks statutory teeth. Without legally binding reuse shares linked to discharge consents, utilities often default to river discharge.

Ø  Example: Power plants located near cities often fail to utilize treated municipal wastewater because national framework guidelines remain non-binding without local regulatory enforcement. As a result, utilities default to discharging the treated water directly into rivers rather than piping it to power facilities.

4.     Public Perception: Psychological resistance to recycled water remains a major social hurdle. Overcoming this requires social framing such as branding treated water under dignified identities like "Apna Jal" (Our Water).

Ø  Example: When Uttar Pradesh and Uttarakhand drafted policies to encourage wastewater reuse, they explicitly adopted the term "Apna Jal" ("Our Water"). Rebranding treated used water with dignified terminology helps eliminate the psychological disgust factor and reframe it as a shared community resource.

Future Roadmap & Implementation Steps

1.       Binding Offtake Mandates: Introduce mandatory reuse percentages within the 'Consent to Operate' granted under the Water Act, 1974, ensuring power plants and industries purchase treated water within defined radiuses (e.g., 50 km).

Ø  Example: Under India's Power Tariff Policy, thermal power plants located within a 50 km radius of municipal Sewage Treatment Plants (STPs) are mandated to purchase and reuse treated wastewater for cooling

2.     Innovative Financial Models: Deploy Public-Private Partnerships (PPPs) via Hybrid Annuity Models (HAM) and leverage blended finance to attract private investment for secondary conveyance pipelines.

Ø  Example: The Mathura STP project under the Namami Gange initiative uses a Hybrid Annuity Model (HAM), where Indian Oil Corporation (IOCL) buys the treated water via secondary conveyance pipelines for its refinery.

3.     Institutional Convergence: Establish unified State-Level Water Reuse Taskforces to streamline coordination between urban local bodies, industrial hubs, and agricultural departments.

Ø  Example: State policies like Gujarat's Policy for Reuse of Treated Wastewater set up unified bodies uniting urban local authorities, industries, and irrigation departments to allocate recycled water efficiently.

4.     Digital Quality Monitoring: Implement IoT-enabled continuous effluent monitoring systems (CEMS) to assure quality compliance, build consumer trust, and mitigate health risks from pathogens or heavy metals.

Ø  Example: The Central Pollution Control Board (CPCB) mandates Online Continuous Effluent Monitoring Systems (OCEMS) with IoT sensors for 17 high-polluting industry sectors to stream real-time water quality data.

Conclusion

From a governance standpoint, transitioning from wastewater treatment to systemic reuse is essential for building a drought-resilient and water-secure nation. By embedding treated water reuse into urban planning, industrial mandates, and circular economy goals, the government can turn an environmental liability into a dependable resource. Securing India's water future requires driving binding policy enforcement, fiscal sustainability, and inter-agency synergy ensuring that every drop treated serves as a catalyst for sustainable economic growth and public well-being.

SOURCE: https://www.thehindu.com/opinion/op-ed/adopt-policies-for-reuse-of-treated-water/article71408637.ece

 

Constructing Sewage Treatment Plants (STPs) alone cannot solve India's growing water crisis without transitioning from mere treatment to active reuse. Examine this statement in light of the National Framework on Safe Reuse of Treated Water (SRTW), 2022. (10 Marks, 150 Words)

 

Introduction

According to CPCB data, urban India generates over 72,000 MLD of sewage, but less than 30% is treated, and under 5% is productively reused underlining that expanding capacity alone cannot solve the water crisis.

The Infrastructure Gap Under schemes like AMRUT and SBM 2.0, STP treatment capacity has scaled up significantly. However, without dedicated distribution pipelines and mandatory off-take mechanisms, treated effluent is frequently discharged back into polluted drains, resulting in wasted capital investments.

 

Role of the SRTW (2022) Framework

1.       Fit-for-Purpose Standards It establishes distinct microbiological and chemical thresholds tailored to specific human and environmental exposure levels. This approach prevents expensive over-treatment while safeguarding public health during non-potable uses.

Ø  Example: Using tertiary-treated water for industrial cooling towers while applying basic secondary-treated water for fodder crop irrigation.

2.     Decentralized State Plans It empowers local state bodies to set customized timelines, financial models, and infrastructure priorities reflective of regional water stress. States can adapt policy frameworks to address unique local demand centers, such as industrial hubs or farm belts.

Ø  Example: Gujarat's policy targeting 100% wastewater reuse by key industrial clusters compared to Punjab prioritizing agricultural reuse.

3.     Urban & River Integration It embeds treated wastewater streams directly into municipal spatial planning and local hydrological restoration projects. This strategy prevents raw sewage from entering river ecosystems while maintaining minimum ecological flow levels.

Ø  Example: Recharging urban lakes in Bengaluru using treated effluent from localized municipal STPs.

Operational Bottlenecks

1.       Lack of Mandatory Obligations: Environment protection laws currently lack legally enforceable reuse targets for bulk consumers. Without explicit legal penalties for non-compliance, industries continue to rely heavily on fresh groundwater. Establishing statutory reuse quotas would force bulk users to transition toward sustainable options.

Ø  Example: Power plants near urban centers continuing to use fresh river water rather than treated municipal sewage.

2.     Economic Infeasibility: Freshwater remains heavily subsidized, making treated water financially uncompetitive. The high initial capital required for dual-piping and tertiary treatment infrastructure further discourages private investments. Rationalizing freshwater tariffs would naturally incentivize commercial users to purchase cheaper reclaimed water.

Ø  Example: Thermal power plants finding piped river water cheaper than investing in tertiary-treated wastewater systems.

3.     Governance Silos: Disconnect between urban development authorities, industrial promotion boards, and irrigation departments hinders bulk off-take. Municipal bodies focus solely on treatment disposal rather than coordinating supply agreements with nearby farms or industrial parks. Integrated water resource management is essential to bridge these inter-agency gaps.

Ø  Example: A city STP discharging high-quality treated water into a river while a neighbouring industrial estate extracts fresh groundwater.

Conclusion

India must mandate treated water off-take obligations by linking them directly to Consent to Operate (CTO) permits under the Water Act, 1974, alongside dual-piping mandates in real estate and dual-pricing structures for freshwater.

 

 

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