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Decentralized Water and Sanitation Solutions

PYQs

8

Articles

1

Momentum

21

Phase IFoundation

Background

Overview

This concept highlights practical, sustainable, and technologically advanced solutions to pressing environmental and public health challenges, aligning with India's development goals (SDG 6) and the need for context-specific infrastructure in diverse geographical settings.

Decentralized water and sanitation solutions involve implementing local-level strategies and technologies for managing water supply, wastewater, and septage, particularly effective in areas where centralized infrastructure is unfeasible or inadequate, promoting sustainability and community involvement.

Phase IIStatic core

Facts & tables

Key facts

Faecal Sludge & Septage Management (FSSM)

A key focus for peri-urban sanitation, including building Faecal Sludge Treatment Plants (FSTPs) where Sewage Treatment Plants (STPs) are distant.

Technology for Collection

Deployment of GPS-equipped desludging trucks to prevent illegal dumping and mini-cesspool vehicles for narrow lanes (e.g., Berhampur, Odisha).

Decentralized Wastewater Treatment

Scaling up modular, plug-and-play systems (e.g., Indra Water, Tigreen) that treat used water close to source, recovering over 95% with minimal land/energy.

Source Sustainability

Community-driven sanitary inspections of local water sources and catchment protection are vital for securing drinking water at its origin (e.g., Maharashtra model).

Reference table

Static syllabus anchors

TypeReference
Conceptual areaSustainable Development Goals (SDG 6)
Conceptual areaEnvironmental Technology
Conceptual areaPublic Health Infrastructure

Reference table

Institutions & roles

BodyRole
Ministry of Jal ShaktiProposed to house swachh bharat mission 3.0 focusing on peri-urban sanitation and fssm
Startups (e.g., Indra Water, Tigreen)Developing and deploying innovative decentralized wastewater treatment technologies
World BankProvides concessional loans and expertise for strategic infrastructure financing, as seen in the uttarakhand model
Phase IIIExam lens

Prelims angle

Overview

Prelims angle: Factual recall

Prelims angle: Multi-statement analysis

Quick revision

  • FSSM: priority for peri-urban sanitation.
  • FSTPs: alternative to STPs in remote areas.
  • Tech solutions: GPS desludging, modular treatment.
  • Source protection: community-driven inspections.
  • Policy support: for green industries, blended finance.

High-confidence PYQs

2024Factual recall, Multi-statement analysis

Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used a...

Environment & EcologyOpen question

With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements : 1...

Environment & EcologyOpen question

"Membrane Bioreactors" are often discussed in the context of:

Environment & EcologyOpen question
2024Multi-statement analysis, Conceptual understanding

Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used a...

Environment & EcologyOpen question

With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements : 1...

Environment & EcologyOpen question

"Membrane Bioreactors" are often discussed in the context of:

Environment & EcologyOpen question
2024Factual recall, Conceptual understanding

Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used a...

Environment & EcologyOpen question

With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements : 1...

Environment & EcologyOpen question

"Membrane Bioreactors" are often discussed in the context of:

Environment & EcologyOpen question
2023Statement-based questions, Conceptual understanding

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements: 1. Biofilters provide waste treatment by r...

Environment & EcologyOpen question

Consider the following statements: 1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts. 2. Carbon fibres once used c...

Science & TechnologyOpen question
2023Statement-based questions, Conceptual understanding

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements: 1. Biofilters provide waste treatment by r...

Environment & EcologyOpen question

Consider the following statements: 1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts. 2. Carbon fibres once used c...

Science & TechnologyOpen question
2019Statement-based questions, Factual recall

As per the Solid Waste Management Rules, 2016 in India, which one of the following statements is correct?

Environment & EcologyOpen question
2016Multi-statement analysis, Institutional roles and functions

Which of the following are the key features of ‘National Ganga River Basin Authority (NGRBA)’? 1. The river basin is the unit of planning and management. 2...

Environment & EcologyOpen question
2015Cause and effect relationships, Multi-statement analysis

What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture? 1. The proliferation of nitrogen-fixing microorganisms in t...

Environment & EcologyOpen question

Topic timeline

Sustainable Development Goals (SDG 6)Environmental TechnologyPublic Health Infrastructure
Prelims 2015· Cause and effect relationships, Multi-statement analysis

What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture? 1. The proliferation of nitrogen-fixing microorganisms in t...

Open question
Prelims 2016· Multi-statement analysis, Institutional roles and functions

Which of the following are the key features of ‘National Ganga River Basin Authority (NGRBA)’? 1. The river basin is the unit of planning and management. 2...

Open question
Prelims 2019· Statement-based questions, Factual recall

As per the Solid Waste Management Rules, 2016 in India, which one of the following statements is correct?

Open question
Prelims 2023· Statement-based questions, Conceptual understanding

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements: 1. Biofilters provide waste treatment by r...

Open question

Consider the following statements: 1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts. 2. Carbon fibres once used c...

Open question
Prelims 2023· Statement-based questions, Conceptual understanding

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements: 1. Biofilters provide waste treatment by r...

Open question

Consider the following statements: 1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts. 2. Carbon fibres once used c...

Open question
Prelims 2024· Factual recall, Multi-statement analysis

Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used a...

Open question

With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements : 1...

Open question

"Membrane Bioreactors" are often discussed in the context of:

Open question
Prelims 2024· Multi-statement analysis, Conceptual understanding

Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used a...

Open question

With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements : 1...

Open question

"Membrane Bioreactors" are often discussed in the context of:

Open question
Prelims 2024· Factual recall, Conceptual understanding

Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used a...

Open question

With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements : 1...

Open question

"Membrane Bioreactors" are often discussed in the context of:

Open question

Water governance in peri-urban areas

26 May 2026 · Decentralized water and sanitation solutions, including FSSM, FSTPs, advanced collection technologies, and modular wastewater treatment systems, are crucial for providing sustainable services, especially in peri-urban areas, requiring policy support and community engagement.

Read article

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