Ganga Action Plan Phase I: Reviving India’s Iconic River

The Ganga River is far more than a waterway – it is a cultural and spiritual lifeline for hundreds of millions of people across India. Revered as the goddess Ganga in Hindu tradition, the river has been a site for sacred rituals, cremation ceremonies, and daily worship for centuries. But by the mid-1980s, the Ganga was in serious trouble. Industrial waste, untreated sewage, and unchecked urbanisation had turned one of the world’s most sacred rivers into one of its most polluted. It was against this backdrop that the Indian government launched the Ganga Action Plan Phase I (GAP-I) – the country’s first-ever large-scale river cleanup mission.

Why was GAP-I needed? 🔗

The Ganga stretches over 2,525 kilometres from its origin at the Gangotri Glacier in the Himalayas to its meeting point with the Bay of Bengal in West Bengal. Its basin supports roughly 40% of India’s population, making it one of the most densely populated river systems on Earth. Millions depend on it for drinking water, agriculture, transportation, and religious fulfilment.

However, rapid industrialisation and population growth along the river’s banks had devastating consequences. Cities like Kanpur, Varanasi, and Allahabad were dumping millions of litres of untreated sewage and industrial effluents directly into the river every day. According to a comprehensive survey conducted by the Central Pollution Control Board (CPCB) in 1984, the 25 Class-I towns along the Ganga were generating approximately 1,340 million litres per day (MLD) of sewage. Dissolved oxygen levels – critical for sustaining aquatic life – had plummeted to dangerously low levels in several stretches. At the same time, Biochemical Oxygen Demand (BOD) readings were far above the permissible limit, indicating severe organic contamination.

The spiritual dimension made the crisis even more pressing. Millions of Hindu devotees continued to bathe in, drink from, and perform rituals in waters that were visibly polluted. As researchers at the Penn State University noted in their assessment, the religious significance of the Ganga is physically expressed through ghats – stepped landings that serve as sites for bathing, cremation, and daily life. The degradation of the river thus threatened not only public health but also a deeply rooted cultural identity.

Launch and objectives of GAP-I 🔗

On 14 January 1986, then Prime Minister Rajiv Gandhi formally launched the Ganga Action Plan as a 100% centrally funded scheme. The plan was administered by the Ministry of Environment and Forests, with the Central Ganga Authority (CGA) – chaired by the Prime Minister – established to oversee its implementation under the Environment Protection Act of 1986.

The primary goal was straightforward: prevent pollution from reaching the river. Over time, following recommendations by the Planning Commission, the objective was refined to restoring the Ganga’s water quality to “Bathing Class” standards. This meant achieving dissolved oxygen levels of at least 5.0 mg/l and keeping BOD levels at or below 3.0 mg/l.

Key actions and strategies 🔗

GAP-I adopted a multi-pronged approach to pollution abatement. The core strategies included:

Sewage interception and diversion: The most critical component involved capturing raw sewage flowing into the Ganga through open drains and redirecting it to treatment facilities. This was fundamental to reducing the organic pollution load on the river.

Sewage treatment plants (STPs): Construction of new treatment plants was the backbone of GAP-I’s infrastructure push. The programme aimed to build capacity to treat the majority of the identified sewage load from the 25 targeted towns across Uttar Pradesh, Bihar, and West Bengal.

Low-cost sanitation: To address non-point source pollution – particularly open defecation along riverbanks – the plan included construction of community toilet complexes and public sanitation infrastructure.

Electric and improved-wood crematoria: Traditional cremation on riverbanks using wood pyres often resulted in partially burnt remains entering the river. GAP-I promoted the construction of electric crematoria to address this problem.

Industrial pollution control: For cities with heavy industrial presence, the plan introduced Common Effluent Treatment Plants (CETPs) – shared facilities for clusters of small industries that could not afford individual treatment systems. Regulatory enforcement was also strengthened with improved monitoring and penalties.

Innovative technologies: GAP-I experimented with newer treatment technologies, including Up-flow Anaerobic Sludge Blanket (UASB) reactors and even biological approaches such as the rehabilitation of soft-shelled turtles, known for their scavenging abilities, to naturally assist in cleaning the river.

In total, 261 pollution abatement projects were sanctioned across the three states at a cost of approximately ₹462 crore.

Kanpur: the toughest test case 🔗

Among all the cities covered under GAP-I, Kanpur presented the greatest challenge – and ultimately became the plan’s most instructive case study. Often referred to as the “Manchester of India” due to its extensive leather and textile industries, Kanpur was one of the largest contributors to the Ganga’s pollution load.

The scale of the problem 🔗

By the 1980s, Kanpur was generating massive quantities of both domestic sewage and toxic industrial effluents. The city’s Jajmau industrial area alone housed over 150 tanneries, collectively discharging millions of litres of chromium-laden wastewater into the river daily. The tannery waste was considered especially harmful because of its heavy metal content – chromium and arsenic levels in the water and surrounding agricultural crops were found to be well above safe limits.

Research conducted in Kanpur during the late 1980s documented that tannery effluents significantly exceeded allowable pollution limits for nearly every measured parameter. The contamination was not limited to the river itself – crops irrigated with polluted water and dairy products from the area also showed elevated levels of toxic metals.

GAP-I investments in Kanpur 🔗

GAP-I directed substantial resources toward Kanpur, focusing on multiple fronts simultaneously. The city received its first major sewage treatment plant with a capacity of 130 MLD, along with an extensive network of sewerage systems designed to capture and channel waste away from the river. A 36 MLD Common Effluent Treatment Plant was also established in Jajmau to handle tannery wastewater specifically. Additionally, intermediate pumping stations were built to manage the flow of sewage across the city’s drainage network.

Outcomes and limitations 🔗

The results were measurable but incomplete. According to water quality data released by the Ministry of Environment, BOD levels at the Kanpur upstream monitoring station fell from 7.2 mg/l in 1986 to 4.3 mg/l by 2005. Downstream of Kanpur, BOD dropped from 8.6 mg/l to 5.4 mg/l over the same period. While this represented a notable improvement, the downstream readings remained above the 3.0 mg/l “Bathing Class” standard.

A key problem was that the infrastructure built under GAP-I was designed for the city’s pollution load at the time of planning. But Kanpur’s population and industrial output continued to grow. The number of tanneries more than doubled since the original infrastructure was put in place, yet treatment capacity was never adequately scaled up. As environmentalist Rakesh Jaiswal, who has monitored the Ganga in Kanpur for nearly three decades, pointed out, most of the functional treatment infrastructure in Kanpur was still what had been built under GAP Phase I, with subsequent phases failing to deliver completed upgrades.

Overall results of GAP-I 🔗

GAP-I was officially declared closed on 31 March 2000, with a final expenditure of approximately ₹452 crore. By the time it concluded, 259 of the 261 sanctioned projects had been completed (the remaining two STPs in Bihar faced delays due to litigation). The programme had created a sewage treatment capacity of 865 MLD across the targeted towns.

Water quality improvements 🔗

Data from the PIB’s official release shows clear improvements at several key monitoring stations between 1986 and 2005. At Allahabad, upstream BOD fell from 11.4 mg/l to 5.5 mg/l. At Varanasi, upstream BOD dropped from 10.1 mg/l to 2.0 mg/l – meeting the bathing standard. A cost-benefit analysis conducted by the Harvard Institute of International Development in the late 1990s found that without GAP-I, the stretch of river with BOD levels exceeding permissible limits would have been about 740 km, compared to the actual 437 km. The study concluded that the programme had delivered significant benefits and that its rate of return was well above the 10% threshold required for public sector projects.

The Harvard study also offered important context: it noted that comparing the Ganga cleanup with efforts on rivers like the Thames, Rhine, and Danube showed that GAP performed reasonably well given the scale of the challenge. The Thames, at just 245 km, took 30 years to restore. The Ganga, at over 2,500 km and supporting a population of 500 million, had been given a fraction of the time and financial resources.

Institutional and knowledge contributions 🔗

Beyond water quality metrics, GAP-I established the foundation for environmental governance related to rivers in India. It created institutional frameworks, built technical expertise in wastewater treatment, and generated the knowledge base that would inform future programmes. The plan also served as a model for the National River Conservation Plan (NRCP), which extended similar approaches to 34 polluted rivers across 20 states by 1995.

Persistent challenges and lessons learned 🔗

Despite these achievements, GAP-I fell short of its ultimate objective of restoring the Ganga to bathing quality across its entire stretch. Several structural problems undermined the plan’s long-term impact.

Infrastructure maintenance gaps 🔗

Many of the sewage treatment plants built under GAP-I suffered from poor maintenance after construction. A subsequent CPCB assessment found that a significant proportion of STPs along the Ganga were either non-operational or operating at well below their installed capacity. High operation and maintenance costs, frequent power outages, and inadequate staffing all contributed to underperformance.

Population growth outpacing capacity 🔗

The sewage generation figures used to plan GAP-I were based on the 1984 CPCB survey. But India’s urban population grew rapidly through the 1990s and 2000s, and the treatment infrastructure simply could not keep up. Cities that generated 1,340 MLD of sewage in 1985 were producing far more by the time GAP-I concluded – and the 865 MLD treatment capacity created was already insufficient.

Weak enforcement and industrial non-compliance 🔗

While GAP-I created regulatory frameworks for industrial pollution, enforcement remained inconsistent. Many industries continued to discharge untreated effluents into the river. The plan’s reliance on “end-of-pipe” solutions – treating waste after it was generated rather than preventing it at the source – proved to be a fundamental weakness.

Limited public participation 🔗

GAP-I was largely a top-down, centrally planned initiative. Local communities, despite being the primary stakeholders, had minimal involvement in the planning or implementation process. This lack of grassroots engagement meant that behavioural changes – reducing open defecation, improving waste disposal practices, participating in river monitoring – did not materialise at the scale needed.

The path forward 🔗

The lessons from GAP-I directly informed subsequent programmes. GAP Phase II, launched in 1993, expanded coverage to tributaries like the Yamuna, Gomti, and Damodar. In 2014, the government launched the Namami Gange Programme with a budget of ₹20,000 crore, adopting a more holistic, basin-wide approach that emphasised community engagement, continuous monitoring, and long-term infrastructure sustainability – all areas where GAP-I had fallen short.

GAP-I may not have fully restored the Ganga, but it accomplished something equally important: it placed river conservation firmly on India’s policy agenda and proved that large-scale environmental intervention, while challenging, can produce real results when backed by political will and adequate resources.

What do you think? Given the scale and complexity of the Ganga’s pollution problem, was a centralised “end-of-pipe” approach like GAP-I ever realistic, or should the plan have prioritised community engagement and pollution prevention from the very beginning? How can future river restoration programmes balance the need for large-scale infrastructure with local ownership and accountability?

References

1. https://www.britannica.com/place/Ganges-River
2. https://www.pib.gov.in/newsite/erelcontent.aspx?relid=18777
3. https://pure.psu.edu/en/publications/the-ganges-and-the-gap-an-assessment-of-efforts-to-clean-a-sacred/
4. https://en.wikipedia.org/wiki/Pollution_of_the_Ganges
5. https://www.gktoday.in/ganga-action-plan/
6. https://dialogue.earth/en/pollution/ganga-an-unholy-mess-at-kanpur/