River Water Quality
The river water analysis is given in the Table-5.7. This analysis indicates that the quality of river conforms to the National Standard (BIS-2296 – 1982 – Class-B). There is no adverse impact on river water quality during winter season, when abstraction of water is maximum.

Table 5.7: River Water Quality
    Subarnarekha Kharkai
    04-05 05-06 04-05 05-06
Cd 0.01 mg/l NT NT NT NT
Cr +6 0.5 mg/l 0.003 0.005 0.003 0.006
Total Chromium - 0.015 - 0.015 -
Cu 1.50 mg/l 0.025 0.04 0.06 0.06
Fe 0.30 mg/l 0.11 0.04 0.25 0.07
Zn 15 mg/l 0.13 0.13 0.145 0.08
Ni NA 0.013 0.07 0.20 0.12
Mn 0.50 mg/l 0.03 0.07 0.015 0.04
NO3 (N) 20 mg/l 3.0 3.5 3.45 3.6
Pb 0.10 mg/l 0.015 0.028 0.008 0.024
pH 6.5 – 8.5 7.5 7.5 7.4 7.5
Total Hardness 300 mg/l 80 141 109 154
DO 6 mg/l 5.15 4.7 4.6 4.2
TSS NA 25 43 44 44
BOD3 2 mg/l 4.5 6.5 3.6 5.5

NA – Not Applicable; NT – No Trace

Studies have also been carried out to study the Dimna Lake stratification and eutrophication. No stratification was observed in the Lake as indicated by no changes in Dissolved Oxygen (DO) levels at different depth. The Company does not use any groundwater source for either industrial or domestic use at Jamshedpur.

Impact on renewable water Reserve (EN21)
The flow of river water after 500 meters from the confluence of Rivers Subarnarekha and Kharkai (water abstraction point) at Jamshedpur is shown in the Table 5.8.

Table 5.8: Details of River flows
Water Abstraction from River Subarnarekha Post Monsoon Winter Summer
 
River flows at Jsr. cum/sec 9.40 4.50 5.93
Water pick up, cum/sec 2.494 2.608 2.423
% age 26.53 57.96 40.86

Source: Regional Environmental Impact Assessment Study Report for Jamshedpur Region by NEERI, Nagpur- May 1995.

 
At Jharia the water is withdrawn from Damodar and Katri rivers and at West Bokaro from a seasonal nalla. The groundwater from the underground mines and wastewater from coal washeries is used after treatment for industrial and domestic purposes at both locations. At mines & quarries, the water is drawn from different sources as shown in Table 5.6 above.

Recycling & reuse of water (EN22)
Gross make-up water requirement for Steel Works was 960,450 cum/day (avg) during the reporting period. Approx. 900,000 Cum/day of water remains in circulation in steel manufacturing processes through the close circuit system and cooling ponds. The make-up water represents primary evaporation, seepage and blow down losses.

BIO-DIVERSITY
Land, Location and Biodiversity (EN6)
The Steel Works is situated at Jamshedpur in the state of Jharkhand, India. The factory covers 702 hectares of land within the lease area of 5094 ha. West Bokaro Division in Hazaribagh District covers 1740 hectares land, in which mining and coal beneficiation activities are performed. Jharia Division occupies 2500 hectares of land for its industrial, mining and domestic activities in the district of Dhanbad. Both are in the state of Jharkhand. The iron ore and dolomite mines are located at Noamundi in the state of Jharkhand and at Joda, Katamati, Khondbond and Gomardih in the state of Orissa. The lease area for various units and the details of forest and non-forest land are furnished in the Table 5.9. The mine leases are in areas rich in biodiversity.
  

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