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Kerala - Apply or Register for Rain Water Harvesting

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Rain water harvesting is a method by which rainfall is collected for future use. The collected rainwater may be stored and used in many ways or directly used for recharge of ground water. Water shortages in many areas can be prevented using this technique. Every citizen in India must take steps to conserve rain water.

Apply In-Person

  1. Applicants shall visit the nearby government office (corporation office, municipal office, panchayat office, etc). The applicant can also visit the government office (depot or area office) of departments concerned with water for assistance.
  2. Refer to the office contact details in the “Office contacts & Locations” section below for address details.
  3. The officials will guide you with plans, designs and various methods of Rain Water Harvesting. They will also undertake site visits if needed.
  4. The applicant can then approach an institution, firm, agency or individual to help build the Rain Water Harvesting (RWH) structure. The applicant may also build the structure on his own using the guidelines given by the officials.
  5. The applicant shall fill in the application form for Rain Water Harvesting with necessary details and submit it. An engineer from that institution, firm or agency will help you to build the structure.
  6. After completion, the applicant shall intimate to the local government office.
  7. The government officials of the Engineering unit will inspect the structure to check whether the structure complies with the Rain Water Harvesting (RWH) norms of the government.


Required Documents[edit]

Application form for Rain Water Harvesting

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Office Locations & Contacts[edit]

Kochi Municipal Corporation
PB No-1016, Cochin
Ernakulam Dt-Kerala State
Pin - 682011
Phone: 91-484-2369007, 23691962369143, 2369149, 2369197, 2369069
Fax: 91-484- 2369023

District Panchayat Office Thiruvananthapuram
near Kerala Public Service Commission head office,
Pattom, Thiruvananthapuram, Kerala 695004

Kerala Water Authority
Palayam - Airport Rd, Pattoor,
Thiruvananthapuram, Kerala 695024

Contact details of Local Self Government :Contact details
Contact details of Local Self Government :Contact details
Contact details of Commissioners and Mayors of Amrut cities:Contact details
Contact details of Kollam Municipal Corporation Link
Contact details of Cochin Municipal Corporation Link
Contact details of Central Ground Water Board (CGWB):Contact details
Contact details of Public Health Engineering Department (PHED) in various states:Contact details



  • The applicant should be a citizen of India.
  • The age of the applicant should be above 18 years.


Fee is not required.


Explain the time until which the certificate/document is valid.
e.g. Birth Certificate Valid Forever

Documents to Use[edit]

Please attach documents that can be used by people. e.g. links


Sample Documents[edit]

Please attach sample completed documents that would help other people.

Processing Time[edit]

It is processed immediately.

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Related Videos[edit]

Videos explaining the procedure or to fill the applications.
Attach videos using the following tag <&video type='website'>video ID|width|height<&/video&> from external websites.
Please remove the '&' inside the tags during implementation.
Website = allocine, blip, dailymotion, facebook, gametrailers, googlevideo, html5, metacafe, myspace, revver,
sevenload, viddler, vimeo, youku, youtube
width = 560, height = 340, Video ID = Can be obtained from the URL of webpage where the video is displayed.
e.gIn the following url '' Video ID is 'Y0US7oR_t3M'.



  • Rain Water Harvesting (RWH) system is mandatory for all buildings.
  • The structure has to be built as soon as possible in the old and new buildings.
  • It should be built according to the norms set by the government.

Required Information[edit]

  • Name
  • Address
  • Building details
  • Mobile No.
  • Email


Need for the Document[edit]

It is required to set up Rain Water Harvesting (RWH) system.

Information which might help[edit]


  • It consists of catchment area (roof), conveyance (guttering, downspouts, first flush system and piping), filtration, storage and distribution.
  • Guttering is done to transport rainwater from the roof to the storage vessel. Guttering is usually fixed to the building just below the roof and catches the rain water as it falls from the roof.
  • First flush system is made in a tank. Debris, dirt, dust and droppings will be present on the roof of a building or other collection area. When the first rains arrive, they will be washed into the tank.
  • Filtration system is made at the opening of the tank. The sand-charcoal-stone filter is mostly used for filtering rainwater entering a tank. Settling tanks and partitions can be used to remove silt and other suspended solids from the water.
  • Storage system is used to store water. Natural storage systems may be used to recharge groundwater aquifers. Man-made storage tanks are also used. They can be made of various materials, in various sizes and shapes. Their cost varies accordingly.

Other uses of the Document/Certificate[edit]

After completion of Rain Water Harvesting(RWH) structure, if it is according to the norms of the government, then a rebate is provided in some states. The rebate can be obtained after getting a certificate of completion of Rain Water Harvesting (RWH) system from the government.

External Links[edit]

Rain Water Harvesting Guidelines:Link
Rain Water Harvesting Guidelines:Link
Rain Water Harvesting Guidelines:Link
Rain Water Harvesting Laws:Link
Rain Water Harvesting Techniques:Link
Guidelines for Urban Water conservation:Link


Benefits of Rain Water Harvesting

  • It improves the quality of ground water
  • It will lead to rise in water levels in wells and bore wells that are drying up
  • It is used to mitigate the effects of drought
  • It is an ideal solution to water problems in areas having inadequate water resources
  • It reduces soil erosion as surface runoff is reduced
  • It provides high quality water, soft and low in minerals.
  • It reduces the cost for pumping of ground water.