BWSSB STPs not following norms

 NGT Norm: only 8 out of 31 STPs are with in parameters

Kere Manjunath ಕೆರೆ ಮಂಜುನಾಥ್

Bengaluru: Out of the 31 STPs managed by BWSSP in the city, only 8 are treating waste water as per norms, while the remaining STPs are exceeding the norms of National Green Bench (NGT) and State Pollution Control Board, according to a report by ActionAid.

After 45 days of monitoring the statistics of STPs recorded on the BWSSB website itself, the agency has prepared a study report on them. 1042.5 million liters of waste water is treated daily in 31 STPs. Studied from Nov 1 to Dec 15, 2022. Six criteria are compared to assess the quality of water treatment.

Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), Potential Hydrogen (pH), Total Suspended Solids (TSS), Ammonical Nitrogen and Total Nitrogen levels were studied following measurement. Raghavendra B.Pachchapur, Program Manager of ActionAid, said that except for 8 STPs, these standards are not being followed.

The TSS level should be less than 10 mg per liter as per Pollution Control Board standards. But BWSSB has set this level at 20 mg. Similarly, if the pH level is set at 6.5–9 instead of 6.5–8.5, there is no measurement of coliform, the human-animal waste that causes many diseases.

What SPTs are like?:

Only STPs at Doddabele, Cubbonpark, yelemallappa Chetty, Mylasandra, Kempambudhi, Rajacanal (New), Agar and Hulimavi are following all the norms.

Kengeri, Rajacanal (old), Hebbala, K&C Valley-30 and 218 are not providing sample data.

The data of STPs in Yalahanka TTP, Halasur, Bellandur Amani lakes is alarming and full of misinformation. Jakkuru STP is in very poor condition. Exceeds all standards.

All norms of National Green Bench (NGT), Pollution Control Board should be followed. It should be monitored by Pollution Control Board. The study suggested that the treated water discharged to the lake and other areas should be of the same standard.

'A fish is not worth living...'

BWSSB says water is discharged from its waste water treatment plants (STPs) into the lakes. The word people use is far away. At least the water in the lake is enough for the fish to survive. With such a purpose, we have studied the water flowing from STPs by collecting the data available on their website. A copy of this will also be submitted to BWSSB, Urban Development Department, State Pollution Control Board, ActionAid's Raghavendra B. Pachchapur said.

Upgradation will be done...

Many of the STPs of BWSSB are very old and cannot meet the norms laid down now. Thus, work is being done to upgrade the STPs to meet the NGT norms, informed Gangadhar, STP Department, BWSSB.

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