Lok Sabha Question No. 2010 (UNSTARRED), answered on 2025-07-31
Subject: HN Valley and KC Valley Projects
Ministry: JAL SHAKTI
Asked by: Dr. K Sudhakar

## GOVERNMENT OF INDIA MINISTRY OF JAL SHAKTI DEPARTMENT OF DRINKING WATER AND SANITATION

## LOK SABHA

## UNSTARRED QUESTION NO. 2010 ANSWERED ON 31/07/2025

## HN VALLEY AND KC VALLEY PROJECTS

## 2010.    DR. K SUDHAKAR:

Will the Minister of JAL SHAKTI be pleased to state:

( a) whether the Government has conducted any study to prove that the water from HN Valley and KC Valley projects is drinkable and if so, the details thereof;

(b) whether the three-stage purification process would make sewage water drinkable and if so, the details thereof including the details of scientific studies conducted in this regard;

(c) whether any permanent irrigation solutions are being adopted for frequent drought-prone regions such as Chikkaballapur, Kolar and Bangalore Rural and if so, the details thereof;

(d) the steps taken/being taken to rejuvenate canals and lakes in the regions of Chikkaballapur, Kolar and Bangalore Rural; and

(e) whether two-stage purification of sewage is sufficient for agricultural use and if so, the details thereof including scientific studies conducted for the purpose?

## ANSWER

## MINISTER OF STATE FOR JAL SHAKTI (SHRI V. SOMANNA)

(a) Since August 2019, Government of India in partnership with States is implementing Jal Jeevan  Mission  (JJM)  -  Har  Ghar  Jal  to  make  provision  of  potable  water  to  every  rural household of the country through functional tap water connection. Water is a state subject and therefore,  the  primary  responsibility  for  planning  and  implementing  piped  water  supply schemes to provide tap water to rural households, lies with the respective State/UT.

As per Government of Karnataka, State has initiated the KC Valley and HN Valley projects with the primary objective to replenish the groundwater table through an indirect groundwater recharge  concept  based  on  soil  Aquifer  Treatment  (SAT)  technology  in  regions  that  are severely affected by drought and over-extraction of ground water, and these are not drinking water  projects.  The  treated  water  utilized  in  these  projects  adheres  to  secondary  treatment standards, as stipulated by the National Green Tribunal (NGT) and the Karnataka Pollution Control Borad, and studies conducted by IISc and other teams have shown that these projects have significantly increased both groundwater quality and quantity. The groundwater quality is suitable for secondary uses, and with minimal treatment (mainly disinfection). The villages served by KC Valley and HN Valley projects are equipped with RO-based drinking water dispenser systems provided by the RDPR department of GoK.

(b)  As  per  State  Govt.,  the  three-stage  purification  still  would  not  make  the  sewage  water drinkable. In this regard, no detailed scientific study has been conducted on this matter till date.

(c) As per State Govt., no permanent irrigation solutions are being adopted by the State, but the Projects like KC Valley and HN Valley have been taken up by Minor Irrigation and Ground Water Development Department, Government of Karnataka, indirectly helps for irrigation.

(d) The Govt. of Karnataka has taken some steps to rejuvenate canals and lakes, their details provided by the State are enclosed at Annexure .

(e) Starting from 2019, the Minor Irrigation department of Govt. of Karnataka has engaged a team  of  scientists  from  IISc,  Bangalore  and  Ms.  EMP  laboratories  Bangalore,  a  NABL accredited lab for continuous monitoring of the recycled project. The IISc (CST) was engaged to monitor the overall outcomes regarding water quality (environmental) being transferred and its effect on indirect groundwater recharge. Under this project, IISc was engaged to study the groundwater  quality  and  its  ability  to  remain  fresh  and  usable  for  long  periods,  soil  agro ecology when indirectly recharged groundwater is used for irrigation and the nature of the change in agricultural practices. IISc was also asked to study the potential implications of this project and address the present and the future of such an endeavour. The current study goes beyond the mere reconstruction of environmental problems and the emerging outcomes.

In  turn,  IISc  has  constituted  a  national-level  subject  matter  expert  committee  comprising scientists/experts  from  IIT-Bombay,  IIT-Kharagpur  and  CSIR-NEERI  Delhi  to  review  the findings of the study. The committee "appreciated that the outcomes of this project are very interesting with positive impacts on solving one of the main problems of water scarcity. Experts gave their  opinion  that  there  is  a  need  to  build  on  this  experience  and  replicate  it  in  other groundwater-scarce areas of Karnataka and India".

IISc has regularly communicated the findings of the study to international peer-reviewed highimpact factor journals, which is reviewed by international experts. The findings of the study have shown significant positive impacts on improved groundwater recharge rates and positive impacts on groundwater quality impacts, significant positive socio-economic impact and there is no adverse impact on human health and animal health has been noticed. Positive impacts on these matters are:

- (i) Improved groundwater levels,
- (ii) Improved groundwater quality,
- (iii) Higher agricultural productivity due to higher availability of water,
- (iv) Improved productivity of milk and fish,
- (v) Farmers income has significantly increased,
- (vi) Revival of rural economy,
- (vii) Improved migratory birds and increased tourism.

Based on the positive outcomes of the KC valley project, the Honourable NGT has appreciated the work and has asked to study if the KC valley water can be used for direct irrigation i.e., not using the recharged groundwater, but directly using the treated water for irrigation. Based on this, the MI&GWD department of GoK has requested IISc to take up such a study. In February 2023, IISc, in collaboration with scientists from GKVK, Bangalore, has started this study. The study has completed one season, and the current findings are encouraging. A detailed study is ongoing.

*****

2

3

4

## ANNEXURE

## ANNEXURE REFERRED TO IN REPLY TO PART (D) OF LOK SABHA UNSTARRED Q. NO. 2010 ANSWERED ON 31.07.2025

District

2

Bangalore

Urban

Bangalore

Urban

Bangalore

Urban

Bangalore

Urban

5

Bangalore

Urban

Bangalore

Urban

Bangalore

Urban

8

Bangalore

Urban

9

10

11

12

Bangalore

Urban

Bangalore

Urban

Ramanagara

Ramanagara

Ramanagara

Taluk

3

Bangalore

Constituency

4

Head of Account

Name of Work

7

2023-24 Approved works List

4702 -Modernization

Construction

| Elemallappashetty Tank in Bidarahalli Hobli, Bangalore East Taluk, Bangalore Urban District, 498.00   | Elemallappashetty Tank in Bidarahalli Hobli, Bangalore East Taluk, Bangalore Urban District, 498.00   | Elemallappashetty Tank in Bidarahalli Hobli, Bangalore East Taluk, Bangalore Urban District, 498.00   | Elemallappashetty Tank in Bidarahalli Hobli, Bangalore East Taluk, Bangalore Urban District, 498.00   | Elemallappashetty Tank in Bidarahalli Hobli, Bangalore East Taluk, Bangalore Urban District, 498.00                                                                                                                                               | Elemallappashetty Tank in Bidarahalli Hobli, Bangalore East Taluk, Bangalore Urban District, 498.00   | Elemallappashetty Tank in Bidarahalli Hobli, Bangalore East Taluk, Bangalore Urban District, 498.00   |
|-------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|
| Bangalore                                                                                             | Yesvanthapura                                                                                         |                                                                                                       | 4702 -Modernization                                                                                   | Clearence from Venkateshwara's land to Dodda Mori to ensure smooth flow of water in 100.00                                                                                                                                                        |                                                                                                       |                                                                                                       |
| South                                                                                                 |                                                                                                       |                                                                                                       | of tanks                                                                                              | Tavarekere Gram Panchayat, Tavarekere Hobli                                                                                                                                                                                                       |                                                                                                       |                                                                                                       |
| Bangalore South Taluk                                                                                 | Bangalore South Taluk                                                                                 | Bangalore South Taluk                                                                                 | Bangalore South Taluk                                                                                 | Bangalore South Taluk                                                                                                                                                                                                                             | Bangalore South Taluk                                                                                 | Bangalore South Taluk                                                                                 |
| South                                                                                                 | Bangalore                                                                                             | Yesvanthapura                                                                                         | 4702 -Modernization of tanks                                                                          | nprovements lo Chikkalıngashastrı tank 1 Sangalore South Taluk, Bangalore Distric 300.00                                                                                                                                                          |                                                                                                       |                                                                                                       |
| Bangalore South                                                                                       | Yesvanthapura                                                                                         |                                                                                                       | 4702 -Modernization of tanks                                                                          | Emremen dor Somin in Der macalal District Construction of Protection work and Jungle Clearence from Nanjappa's land to Janardhan's 100.00                                                                                                         |                                                                                                       |                                                                                                       |
| South                                                                                                 | Bangalore                                                                                             | Yesvanthapura 4702 -Modernization                                                                     | of tanks                                                                                              | Land to ensure smooth flow of water in Tavarekere Gram Panchayat, Tavarckere Hobli Bangalore South Taluk 100.00                                                                                                                                   |                                                                                                       |                                                                                                       |
| South                                                                                                 | Bangalore                                                                                             | Yesvanthapura                                                                                         | 4702 -Modernization of tanks                                                                          | Construction of Protection work and Jungle Clearence trom Andanappa's land to Krishna's Land to ensure smooth flow of water in Tavarekere Gram Panchayat, Tavarekere Hobli 100.00                                                                 |                                                                                                       |                                                                                                       |
|                                                                                                       | Bangalore South                                                                                       | Yesvanthapura                                                                                         | 4702 -Modernization of tanks                                                                          | Bangalore South Taluk. Construction of Rajakaluve works and jungle Clearance due to heavy rainfall in Ganakalu village under Cholanayakanahalli Gram Panayat limits of Tavarekere Hobli, Bangalore South Taluk 100.00                             |                                                                                                       |                                                                                                       |
| South                                                                                                 | Bangalore                                                                                             | Yesvanthapura                                                                                         | of tanks                                                                                              | Desilting and Jungle Clearance to 4702 -Modernization Muddayyanapalya Tank inTavaarekere Gram Panchayal in Tavarekere Hobli, Bangalorc South Taluk 50.00                                                                                          |                                                                                                       |                                                                                                       |
| South South                                                                                           | Bangalore Bangalore Bangalore South                                                                   | Yesvanthapura                                                                                         | 4702 -Modernization of tanks of tanks                                                                 | Desilting and Jungle Clearance to Tank in Jolanayakanahalli Gram Tavarekere Ilobli, Bangalore South Taluk Improvements to Feeder Canal in Dyavasandr 4702 -Modernization Village, Jigani Hobali Anekal Taluk, Bangalor Urban District 50.00 50.00 |                                                                                                       |                                                                                                       |
|                                                                                                       | Kanakapura Kanakapura                                                                                 |                                                                                                       | of tanks                                                                                              | 702 -Modernization Improvements to Herandyapanahalli Tank was cir in Kanakapura Taluk, Ramanagara Distri 355.00                                                                                                                                   |                                                                                                       |                                                                                                       |
|                                                                                                       | Kanakapura Kanakapura                                                                                 |                                                                                                       | of tanks                                                                                              | Construction of chain link fencing an 4702 -Modemization Encrochment Clearance around Hosadodd Tank, in Kasaba Hobli, Kanakapura Taluk 35.00                                                                                                      |                                                                                                       |                                                                                                       |
| Harohalli**                                                                                           | Ramanagara                                                                                            |                                                                                                       | of tanks                                                                                              | 1702 - Modernization (under Keriaro Sor emati cice Corl, Kurubarahalli branch 300.00                                                                                                                                                              |                                                                                                       |                                                                                                       |
|                                                                                                       |                                                                                                       |                                                                                                       | Page 1 of2                                                                                            | aranen ds ten bank anl, arali alik,.                                                                                                                                                                                                              |                                                                                                       |                                                                                                       |

of chain link fencing to

Estimate Cost

8

UNSTARRED &. NO. 2010 ANSWERED ON 31.07.2025

SI.no

-

14

District

Taluk

2

Ramanagara Harohalli

15

Ramanagara

16 Chikkaballap ura

17

Chikkaballap ura

Cia a Call Chikalapura 4702-Motemiation

19

Kolar

20

Kolar

21 Kolar

22 Kolar

23 Kolar

24 Kolar

25 Kolar

26

Kolar

Bangalore

1

2

3

Urban

District,

Bangalore

Urban

District,

Bangalore

Rural

District,

Constituency

Head of Account

Name of Work

Estimate Cost

| 3 4                        |                       |                                               | Improvements to Anedoddi Sluice Canal, under 8                                                                                                                       |
|----------------------------|-----------------------|-----------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Ramanagara                 |                       | 4702 - Modernization of tanks                 | Yerchalli branch canal of Bhairamangala left 200.00                                                                                                                  |
|                            | Ramanagara Magadi     | of tanks                                      | bank canal, Harohalli taluk, Ramanagara district Improvements to Romanahalli branch canal of 4702 -Modernization right bank canal of Bhairamangala rescrvoir. 120.00 |
| Bagepalli                  | Bagepalli             | district, 4702 -Modernization                 | Bidadi Hobli, Ramanagara talukRamanagara Improvements to Draft Canal from Cheruva Mandarapalli tank Waste Weir to Balchosahalli 25.00                                |
|                            |                       | of tanks 4702 - Modernization                 | bridge, under Julapalya Panchayat, Bagpally Taluk, Chikkaballapur District. Improvements to Draft Canal from Kushalamma Topi Bridge to Balehosahalli Bridge in       |
| Bagepalli                  | Bagepalli             | of tanks Canal                                | Polanayakanahalli Panchayat, Bagepally Taluk, Chikkaballapur District. Construction of Percolation Tank and Draft Muddenahalli Village, 25.00 500.00                 |
| Bangarapete Bangarapete    |                       | 4702 -Modernization of tanks                  | Chikkaballapur taluk, Chikkaballapur district, Taluk, Kolar District, 100.00                                                                                         |
| Bangarapete Bangarapete    |                       | 4702 -Modernization of tanks                  | 50.00                                                                                                                                                                |
| Mulabagilu Mulabagilu      |                       |                                               | Taluk, Kolar District, 1a02 Moderiation lapore tok plam bey older Kee 25.00                                                                                          |
| Mulabagilu Mulabagilu      |                       | 4702-Modernization of tanks                   | Construction of Waste weir and Improvements to C.Gundlahalli Doddakere Katte and Mulbagilu Taluk, Kolar District, 25.00                                              |
|                            | Mulabagilu Mulabagilu | 4702-Modemization of tanks                    | Construction of Revetment and improvements to draft canal of C.GundaÅllahalli in Mulbagilu 25.00                                                                     |
| Mulabagilu Mulabagilu      |                       | 4702 - Modernization of tanks Kolar district, | Taluk, Kolar District. Contini Do care in it a C. 25.00                                                                                                              |
| Mulabagilu Mulabagilu      |                       | of tanks district,                            | Improvements to Rajendarahalli Doddakere 4702 - Modemization katte and Waste weir in Mulbagilu aluk, Kolar 25.00                                                     |
| Kolar Kolar                |                       | 702 - Modemization Comprehensiv of tanks      | Development Work to yrandahalli Tank in Vemagal Hobli Kola Taluk, Kolar District 325.00                                                                              |
| Yclahanka                  | Yclahanka             | 2024-25 Approved works List of tanks          | 02 -Modernization | Reconstruction of Dasenahalli Percolation tar 460.00                                                                                        |
| Yelahanka Yclahanka        |                       | of tanks                                      | 4702 - Modernization Improvemnts to Jagalahatti Tank in Yelahanka Taluk, Bangalore Urban District, 500.00                                                            |
| Doddaballap Doddaballapura | ura                   | 4702 -Modernization Repair of tanks           | works to Nagara Tank in Doddaballapur Taluk, Bangalore Rural District 50.00                                                                                          |
|                            |                       |                                               | e0060554                                                                                                                                                             |

Page 2 of 2

Deputy Secretary to Governmerite! Minor Imigation and Ground, Water! Development Departmentsy Covernment of Karnataki!

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VINAYAKA R HARANATIL