Consent issued by the HPCB authority is subdivided into four categories based on the location of industries, aims of consent management, and formulation of norms associated with surveillance White, Green, Orange, and Red:
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White Category (Score of 20 or less, encompassing 192+ existing industries): The government has introduced the concept of the 'White Category' to identify the least polluting industries.
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Green Category (Score of 21 – 40, encompassing 91+ existing industries): Industries with a pollution index ranging from 21 to 40 are categorized as Green.
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Orange Category (Score of 41 – 59, encompassing 83+ existing industries): The Orange category encompasses industries with a pollution index ranging from 41 to 59.
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Red Category (Score of 60 or more, encompassing 60+ existing industries): The Ministry of Environment & Forests designates highly polluting industries under the red category.
Note: Industries falling under the state of Haryana under the Green, Orange, and Red category shall mandatorily obtain the Consent to Establish and Consent to Operate under the Air and Water Act. However, the businesses falling under the white category shall obtain an undertaking within 30 days from the establishment of the business entity to the HPCB.