The MSME registration asks for the business activity by NIC code. For treatment of waste water or sewer by means of physical, chemical or biological processes, that activity is 37003.
NIC code · National Industrial Classification 2008
37003 is the 5-digit NIC 2008 code for treatment of waste water or sewer by means of physical, chemical or biological processes: a sub-class of class 3700, sewerage, within division 37, sewerage. Search a code or activity below, or copy the code for your Udyam or SPICe+ form.
This code
Division 37Group 370Class 3700Sub-class 37003
Treatment of waste water or sewer by means of physical, chemical or biological processes
Sub-class 37003 · Class 3700 · Group 370 · Division 37 · Section E, NIC 2008
The code
Where the code sits in the National Industrial Classification 2008, from section to sub-class, in the official wording.
370035 digits: 37 + 0 + 0 + 3NIC 2025 · Notice dated 16 October 2026
On 18 November 2025 the Ministry of Statistics and Programme Implementation released NIC 2025, which uses 6-digit codes aligned with the UN's ISIC Revision 5. This page shows the NIC 2008 code 37003. The matching NIC 2025 code will be added here once it is mapped from MoSPI's official concordance.
How to read it
An NIC code is built in layers. Each digit narrows the one before it: the division, the group, the class, and finally the 5-digit sub-class. Divisions themselves are grouped under lettered sections.
The broadest numbered layer. Division 37 covers sewerage. It sits in section E, water supply; sewerage, waste management and remediation activities.
Sewerage.
Sewerage.
Treatment of waste water or sewer by means of physical, chemical or biological processes. The full 5-digit code you enter where a form asks for the business activity by NIC code.
Where you use it
Two registration forms ask for the business activity by NIC code. This is where 37003 is entered.
The MSME registration asks for the business activity by NIC code. For treatment of waste water or sewer by means of physical, chemical or biological processes, that activity is 37003.
The company incorporation form asks for the main industrial activity of the proposed company by NIC code.
Not GST. GST registration does not use NIC codes; goods and services there are classified by HSN and SAC codes.
Choosing the right code
37003 is for treatment of waste water or sewer by means of physical, chemical or biological processes. The codes below sit closest to it in NIC 2008: the other sub-classes of class 3700. Each has its own page with the official wording.
37001Class 3700 · another sub-class of the same class37002Class 3700 · another sub-class of the same classClass 3700 has 3 sub-classes in NIC 2008, including 37003.
Questions
Treatment of waste water or sewer by means of physical, chemical or biological processes, in the National Industrial Classification 2008. It is a sub-class of class 3700, sewerage.
Class 3700, sewerage, has 3 sub-classes in NIC 2008. Besides 37003, they are: 37001 (The operation and maintenance of sewer systems); 37002 (Collecting and transporting of human or industrial waste water or rain water by means of sewerage networks, collectors, tanks and other means of transport (sewage vehicles etc.)).
In Udyam Registration, which asks for the business activity by NIC code, and in the SPICe+ company incorporation form, which asks for the main industrial activity by NIC code. GST registration does not use NIC codes.
About this page
The section, division, group, class and sub-class on this page are taken word for word from the official document “National Industrial Classification (All Economic Activities) 2008”, Central Statistical Organisation, Ministry of Statistics and Programme Implementation, Government of India.
This is reference information on the classification of a business activity. It is not advice on which code your own business should declare, and the official NIC document prevails if the two ever differ. A change in the classification, including the MoSPI concordance to NIC 2025, re-opens this page for checking.
Not sure which code fits your activity, or spotted a mismatch? Use the WhatsApp button on this page and tell us what the business sells and how.