The Aam Aadmi Party (AAP) claims Yamuna River pollution has returned to normal levels after Chhath Puja, alleging the Haryana government diverted extra water for the festival and elections. AAP claims this water was rerouted post-event, causing pollution to rise again. Delhi BJP counters that Yamuna's water quality improved in December 2025 compared to the previous year, attributing the AAP leader's frustration to electoral defeat.