We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Emerging Chemical Pollutants in Aquatic Systems: Implications for Waterbird Health and Diversity in Indian Waterbodies
Summary
This review pulls together existing research showing that only 28% of India's sewage is properly treated before entering rivers and wetlands, allowing drugs, detergent chemicals, pesticides, heavy metals, and microplastics to build up in the water. Waterbirds that eat fish and other aquatic life from these contaminated areas absorb these pollutants in concentrated amounts, leading to problems like thinning eggshells, weakened immune systems, and liver damage. Since these same waterways often supply drinking water and food (like fish) to nearby communities, the pollution threatening these birds is a warning sign of contamination that could also aff
Emerging chemical pollutants in Indian aquatic systems pose a growing and poorly regulated threat to waterbird populations. India generates approximately 72,368 million litres per day (MLD) of sewage, of which only 28% receives adequate treatment before discharge. Pharmaceuticals, personal care products, surfactant metabolites—including nonylphenol ethoxylates (NPE; detected at 0.8–22.3 µg/L) and linear alkylbenzene sulfonates (LAS; detected at 0.4–22.5 mg/L) in major Indian rivers —organochlorine and organophosphate pesticides, heavy metals, and microplastics are contaminating river basins, estuaries, and wetlands of national significance. Waterbirds occupy the apex of aquatic food webs and are consequently susceptible to bioaccumulation and biomagnification of lipophilic contaminants. Across resident and migratory species in India, chemical exposure has been associated with eggshell thinning, immunosuppression, hepatotoxicity, behavioural disruption, and population decline. Among 12 threatened or near-threatened waterbird species reviewed, all show documented or inferred chemical exposure risks at key Indian wetlands. This review covers pollutant sources, environmental distribution and fate, and ecotoxicological effects on waterbird health and diversity. It also compares Indian regulatory standards with those of the EU and USA, identifies monitoring gaps, and presents prioritized, actionable recommendations for policy and conservation.