Five certification programs dominate the language of green cleaning RFPs. They are not interchangeable. Some test product chemistry. Some test program implementation. Some require ongoing surveillance. Some are essentially self-certified. Operators bidding sustainability-driven contracts need to know which is which.
Green Seal (GS-37, GS-40, GS-42)
What it certifies: Product formulations — primarily cleaning products (GS-37), floor finishes/strippers (GS-40), and cleaning service operations (GS-42). The product standards test for: pH, VOC content, toxicity, biodegradability, packaging, performance equivalence. Performance is part of the standard — this distinguishes Green Seal from many competitors.
Surveillance: Independent third-party testing, paid by the manufacturer. Re-certification every 3 years with ongoing surveillance authority. GS-42 (service standard) requires on-site audits including chemical inventory verification and worker training documentation.
What it doesn't verify: Equipment, hauling, or post-use disposal practices. Doesn't audit individual cleaner behavior in the field.
Trust signal: High for product chemistry, moderate for service operations.
EcoLogo (UL ECOLOGO) — CCD-146, CCD-147
What it certifies: Similar scope to Green Seal — cleaning products (CCD-146), hand cleaners (CCD-147). UL-administered. Multi-attribute lifecycle approach including raw materials, manufacturing, distribution, end-of-life.
Surveillance: Independent UL audit, 3-year cycle. UL has revocation authority and uses it more often than Green Seal in our tracking.
Trust signal: Equivalent to Green Seal for products. LEED treats Green Seal and EcoLogo interchangeably for compliance.
EPA Safer Choice (formerly Design for the Environment)
What it certifies: Individual ingredients and the final formulation. EPA chemists review each ingredient against the Safer Choice Standard's hazard criteria. Stricter than Green Seal on individual chemical exposure.
Surveillance: Government program with statutory authority. Re-evaluation periodic; ingredient lists updated as toxicology evidence emerges. EPA can de-list.
What it doesn't verify: Performance. Safer Choice is a hazard-based certification, not a performance certification. A Safer Choice product can have weaker cleaning performance than its non-certified competitor.
Trust signal: Highest for ingredient hazard assessment; not a performance signal.
LEED v4.1 O+M — Indoor Environmental Quality Credit, Green Cleaning
What it requires: A green cleaning policy, defined products (referencing Green Seal GS-37 or EcoLogo CCD-146 or Safer Choice), training, equipment (low-noise HEPA vacuums, microfiber). The LEED auditor reviews documentation; on-site verification varies.
Surveillance: Document-driven. Re-certification every 5 years with annual reporting.
What it doesn't verify: Day-to-day product use. A building can be LEED-certified with a green cleaning policy on paper while the cleaner uses unlabeled bulk products in the field.
WELL v2 — Feature C03, Cleaning Products and Protocols
What it requires: Building-level cleaning program meeting WELL's Cleaning Plan criteria: published product list, training, monitoring of IAQ during cleaning events, ban on certain ingredient classes (specific glycol ethers, certain quats, fragrances above threshold).
Surveillance: Initial Performance Verification + annual re-attestation. WELL Performance Verifiers conduct site visits and review product registries.
What it does that LEED doesn't: WELL inspects the actual product registry on-site and confirms field practice. Stricter on enforcement than LEED.
What this means for bid responses
When an RFP says "Green Seal–certified products required," that is a specific verifiable bar. Submit product labels with certification numbers. Easy.
When an RFP says "sustainable cleaning practices" without specifying a certification, you need to ask for the building's certification status. A LEED-certified building has a green cleaning policy already on file; a WELL-certified building has a product registry; an uncertified building leaves it open.
The most common operator failure: claiming "GS-42 service-level certification" without actually carrying it. GS-42 is verifiable; it has a public registry. Bid teams reviewing your response will check.
The cost gap
Green Seal / EcoLogo / Safer Choice products run 10–25% more per gallon than uncertified equivalents. The premium has shrunk since 2018; in 2026 several major brands' green lines are price-parity with conventional formulations. The bidder who claims 30% premium is using out-of-date pricing.