Pollution: air, water, soil, plastic & e-waste

The Statutory Spine

Pollution control in India rests on three foundational statutes. The Water (Prevention and Control of Pollution) Act, 1974 created the Central Pollution Control Board (CPCB) and State Pollution Control Boards (SPCBs), and introduced the consent mechanism (Consent to Establish, Consent to Operate). The Air (Prevention and Control of Pollution) Act, 1981 extended this machinery to air, was enacted under Article 253 to implement the 1972 Stockholm Conference decisions, and empowers states to declare 'air pollution control areas'. The umbrella Environment (Protection) Act, 1986 (EPA), enacted post-Bhopal (December 1984), is the parent legislation under which most subsequent rules — plastic, e-waste, hazardous waste, noise, CRZ — are notified.

Air Pollution: Standards and Programmes

The CPCB notified National Ambient Air Quality Standards (NAAQS) in 2009, prescribing limits for 12 pollutants including PM2.5 (annual 40 µg/m³, 24-hour 60 µg/m³), PM10, SO2, NO2, ozone, lead, CO, ammonia, benzene, benzo(a)pyrene, arsenic and nickel. The National Air Quality Index (AQI), launched in 2015, collapses eight pollutants into six categories from 'Good' (0–50) to 'Severe' (401–500).

The National Clean Air Programme (NCAP), launched January 2019, originally targeted a 20–30% reduction in PM2.5/PM10 by 2024 over a 2017 base, later revised to 40% reduction by 2025–26 for 131 non-attainment cities. The Commission for Air Quality Management in the NCR and Adjoining Areas Act, 2021 created a statutory CAQM, subsuming the earlier EPCA, with power to issue binding directions across Delhi, Punjab, Haryana, Rajasthan and UP — a direct response to stubble-burning and the Graded Response Action Plan (GRAP).

Water Pollution and the Namami Gange Mission

Water pollution is governed by the 1974 Act plus effluent standards under the EPA. The Namami Gange programme (2014), implemented through the National Mission for Clean Ganga, was given statutory teeth by the Ganga River Basin Authority order (2016) under the EPA. The Supreme Court in M.C. Mehta v. Union of India (the Ganga Pollution / Kanpur tanneries case, 1987–88) established the principle that the right to clean water flows from Article 21, and ordered closure of polluting tanneries. The National Green Tribunal (NGT), created by the NGT Act, 2010, adjudicates environmental disputes and applies the Polluter Pays and Precautionary principles, both read into Indian law in Vellore Citizens Welfare Forum v. Union of India (1996) as part of sustainable development.

For groundwater contamination, fluoride, arsenic (notably the Gangetic plains) and nitrate remain the dominant chemical pollutants; the Central Ground Water Authority regulates extraction. Candidates must connect these statutes to constitutional anchors: Article 48A (Directive Principle, environment protection) and Article 51A(g) (Fundamental Duty), both inserted by the 42nd Amendment, 1976.

Plastic Waste: Rules and the EPR Pivot

The Plastic Waste Management Rules, 2016 (amended 2018, 2021, 2022) form the core regime. The landmark 2021 amendment banned identified single-use plastics from 1 July 2022 — items such as earbuds with plastic sticks, plastic cutlery, straws, stirrers, and polystyrene decoration — and raised the minimum carry-bag thickness to 75 microns (September 2021) and 120 microns (December 2022). The Plastic Waste Management (Amendment) Rules, 2022 introduced mandatory Extended Producer Responsibility (EPR) with tradable EPR certificates, shifting the cost of collection and recycling onto producers, importers and brand-owners (PIBOs).

E-Waste: A Fast-Evolving Regime

India is among the world's largest e-waste generators. The E-Waste (Management) Rules, 2016 first mandated EPR and collection targets; the E-Waste (Management) Rules, 2022 (effective 1 April 2023) overhauled the framework, replacing the old authorisation system with an online EPR-certificate registration through CPCB, expanding the schedule to 106 electrical and electronic equipment items, and setting graded recycling targets. The rules restrict hazardous substances (RoHS-type provisions on lead, mercury, cadmium, hexavalent chromium). Informal-sector dismantling (Seelampur, Moradabad) remains the policy challenge, releasing dioxins and heavy metals.

Soil and Other Streams

Soil pollution is addressed indirectly through the Hazardous and Other Wastes (Management and Transboundary Movement) Rules, 2016, the Solid Waste Management Rules, 2016 (mandating source segregation and composting), the Bio-Medical Waste Management Rules, 2016, and Construction & Demolition Waste Rules, 2016. India ratified the Basel Convention (1992), the Stockholm Convention on POPs (2006) and the Minamata Convention on Mercury (2018).

Why This Matters for the Exam

This topic is doubly tested. In Prelims, the UPSC repeatedly mines specific thresholds and institutional facts: the 2021 PYQ on the AQI, questions on which pollutants the NAAQS covers, EPR applicability, and the single-use plastic ban date. Retain the hard numbers — 75/120 microns, 1 July 2022 ban, NAAQS 2009, AQI 2015, NCAP 2019 — because Prelims rewards precision, not narrative.

In Mains GS-3 (under 'conservation, environmental pollution and degradation'), the demand is analytical: link pollution to public health, the polluter-pays principle, federal friction over stubble burning, and the informal recycling economy. A high-scoring answer names the statute, the year, the responsible institution (CPCB/SPCB/NGT/CAQM), and offers a balanced fix — EPR enforcement, decentralised waste processing, and air-shed-level governance rather than city-level fixes. Always tie back to Articles 21, 48A and 51A(g) and the Vellore and M.C. Mehta precedents to demonstrate doctrinal command.