A bench headed by Justice Jawad Rahim ordered Central Pollution Control Board (CPCB) and Delhi Pollution Control Committee (DPCC) to ensure that action is taken against the erring industries responsible for causing pollution.
"Though, the issue is with regard to high level of ammonia in the water which is reaching the water reservoir of Delhi Jal Board, if you take the entire river eco-system, the pollution level in the portion of the river passing Delhi also needs to be properly checked.
The tribunal also directed that the report submitted earlier by the CPCB with regard to pollutants needed to be rechecked with regard to pollution levels of ammonia downstream at Khojkipur drain No 2 and Khojkipur drain, as figures appearing in it appear to be incorrect.
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CPCB had submitted its analysis report of ammonia at Tajewala in Haryana, Wazirabad water treatment plant, Okhla and ITO barrage in Delhi.
According to the report, ammonia level at Hathnikund Barrage 0.6 mg per litre, 1.9 mg per litre at Wazirabad, 24.9 at ITO barrage on February 14 while at Okhla water treatment plant it was 0.8 mg per litre on February 15.
While DJB had alleged that Haryana was supplying "poisoned sewage water" to the national capital which had 2.6 parts per million of ammonia, the counsel for Haryana had refuted the contention and said there was no breach of any agreement.
DJB, which supplies water to the city, had approached the tribunal demanding that Haryana be asked to take urgent steps to check the "dangerous level of ammonia" in river Yamuna.
The petition also claimed that when the water enters Haryana, the ammonia level is nil and very much treatable, whereas when the water enters Delhi, the level is very high.