Parameters

Sukhna Lake

Attawa

Sukhna Choe/Drain

PKR

Baltana

Lake-42

Dhanas Lake (D1)

Diggian Tertiary Treatment

Diggian

3 BRD

Raipur Khurd

Raipur Kalan

pH

7.9

7.5

7.8

7.6

7.3

8.6

7.5

7.5

7.7

7.3

7.9

7.4

DO (mg/l)

<1

1.8

<1

<1

<1

5.2

<1

<1

1.1

<1

<1

<1

COD (mg/l)

40

96

101

400

61

20

32

44

105

263

97

307

BOD (mg/l)

8

40

28

141

22

4

13

13

28

71

31

92

TSS (mg/l)

14

90

55

270

45

15

40

30

50

120

28

25

NH3-N (mg/l)

1.2

5.6

3.5

18.2

2.6

BDL

1.6

1.8

3.2

8.5

3.6

12.4

NO3-N (mg/l)

2.1

1.9

2.6

1.8

3.1

BDL

2.1

1.3

1.5

2.1

2.1

1.7



Water quality analysis of all the drains and sewage treatment plants established in the U.T. region are carried out regularly (monthly basis) to keep a sharp eye on the quality of water flowing through the city. Except the open drains (Sukhna Choe, Patiala Ki Rao, North Choe) passing through the city, the treated water of STP’s lies near the permissible limits. As per the new guidelines upgradation of all STP’s is proposed to take the BOD of treated water below the figure of 10 mg/L.     

Like the adjoining states of the city, no groundwater from shallow tube wells in Chandigarh is prescribed as drinkable. MC discourages use of handpumps for drinking water. Hand pumps in markets serve other purposes of the use of water. These Hand Pumps are painted red to indicate the same. MC has given potable water supply to various sections of market/commercial places which is for hours in a day.


Source: Chandigarh Pollution Control Committee (Dec 2015)