Industry categories: Red, Orange, Green, White & Blue
India classifies industrial sectors by pollution potential using the Pollution Index (PI) — a 0–100 score combining water pollution, air pollution and hazardous-waste scores with equal weight. The Central Pollution Control Board's 2025 classification ("Classification of Sectors into Red, Orange, Green, White and Blue Categories", January 2025) covers 419 sectors: Red (125), Orange (137), Green (94), White (54) and Blue (9). GPCB follows this classification for consent management in Gujarat.
The five categories
| Category | Pollution Index | Meaning | Consent needs | |---|---|---|---| | Red | 80 and above | Highest pollution potential — e.g. textile dyeing, dye & dye intermediates, pharma (API), tanneries, refineries, large chemical plants | CTE + CCA mandatory; strictest siting & monitoring; many also need Environmental Clearance; not permitted in ecologically sensitive areas | | Orange | 55 to <80 | Moderate pollution — e.g. brick kilns, food processing with boilers, hotels (mid-size), paint blending | CTE + CCA mandatory; standard scrutiny | | Green | 25 to <55 | Low pollution — e.g. dry-process units, assembly, cold storage, sawmills | CTE + CCA with lighter scrutiny and longer validity | | White | <25 | Practically non-polluting — e.g. air coolers assembly, biscuit trays, cotton/woollen hosiery (dry), chalk making | Exempt from CTE/CCA — only intimation/registration to GPCB | | Blue | — | Essential environmental services — sewage treatment plants, MSW processing, waste-to-energy, C&D waste plants | Consent required but treated favourably (extended validity) |
The Blue category was introduced in the 2025 revision to recognise facilities that manage pollution (STPs, waste processors) rather than generate it for private production.
Why your category matters
- Siting: minimum distances from residential areas, schools and water bodies scale with category (Red 500 m from residential, Orange 200 m, Green 100 m; all categories 500 m from rivers/lakes/reservoirs under GPCB criteria).
- Fees and validity: cleaner categories pay less and renew less often.
- Monitoring: Red units face the most inspections, audits (Schedule II in Gujarat) and continuous-monitoring requirements.
- Location bans: Red units are barred from critically polluted clusters and eco-sensitive zones; several GIDC estates restrict which categories they accept.
How to find your sector
Use the Category Lookup page on this site — it searches all sectors from the CPCB 2025 list with their Pollution Index. If your activity spans multiple sectors (e.g. spinning and dyeing), the most polluting applicable sector governs. When in doubt, GPCB's regional office gives a written categorisation opinion.