EPA WaterSense Certification — CPF Green Label Solution for Bathroom & Home Sellers
What Is WaterSense Certification?
WaterSense is a voluntary water-efficient product certification and labeling program launched by the U.S. Environmental Protection Agency (EPA) in 2006. Its operational model references the well-known ENERGY STAR but focuses on the core metric of "water efficiency." Simply put, WaterSense's core requirement is: products must use at least 20% less water than comparable conventional products while delivering equivalent or better user experience.
As of 2026, WaterSense-certified products have cumulatively saved over 7.5 trillion gallons of water across the U.S. and saved consumers over $170 billion in water bills. This certification carries exceptional credibility in the U.S. home and building materials market and has been included in the Amazon Climate Pledge Friendly (CPF) certification list.
WaterSense Certification Product Scope
| Product Category | Specific Products | WaterSense Water-Saving Standard |
|---|---|---|
| Bathroom Faucets | Lavatory faucets, vanity faucets | Maximum flow rate ≤ 1.5 GPM |
| Toilets | One-piece/two-piece toilets | Effective flush volume ≤ 1.28 GPF |
| Showerheads | Fixed/handheld showerheads | Maximum flow rate ≤ 2.0 GPM |
| Urinals | Commercial/residential urinals | Effective flush volume ≤ 0.5 GPF |
| Irrigation Controllers | Weather-based/soil moisture controllers | Must feature smart water-saving adjustment |
| Pre-Rinse Spray Valves | Commercial kitchen spray valves | Flow rate ≤ 1.28 GPM |
WaterSense Certification Process and Costs
The WaterSense certification process consists of the following key steps:
- Product Testing: Complete product performance and water efficiency testing at an EPA-recognized independent laboratory
- Partnership Signing: Manufacturer signs a WaterSense partnership agreement with the EPA
- Certification Application Submission: Submit test reports and product documentation through the EPA online system
- Review and Approval: Upon EPA approval, the product is listed in the WaterSense certified product directory
- Label Usage Management: Use the WaterSense label on product packaging and marketing materials per EPA brand guidelines
| Cost Item | Reference Amount (USD) | Description |
|---|---|---|
| Laboratory Testing Fee | $2,000-$8,000 | Per model |
| EPA Certification Fee | Free | EPA charges no official certification fee |
| Annual Partnership Fee | Free | No annual fee for this voluntary program |
| Certification Maintenance Consulting Fee | $1,500-$5,000 | Optional professional service |
WaterSense is one of the rare EPA certification programs with zero official certification fees, with the primary costs concentrated in product testing and compliance documentation. For bathroom enterprises looking to certify multiple SKUs in bulk, GreenArk (Shenzhen) Certification Co., Ltd. can help optimize testing plans, reduce per-unit certification costs, and provide end-to-end services from laboratory selection to EPA online submission.
WaterSense CPF Advantages
Under the Amazon CPF framework, WaterSense as an official EPA certification offers the following advantages:
- No additional CPF review fee — certification equals eligibility
- Green label display boosts search ranking and click-through rates (average increase of 10%-15%)
- Aligns with U.S. consumers' dual demand for water savings and environmental protection
FAQ
Q: Does WaterSense certification require U.S. manufacturing?
A: No. Manufacturers from any country worldwide may apply, but product testing must be completed at an EPA-recognized laboratory.
Q: Can one certification cover multiple SKUs?
A: No. WaterSense certifies by Model in principle, with each model requiring separate testing and application. However, same-series variants may qualify for a simplified process.
Q: What is the difference between WaterSense and ENERGY STAR?
A: WaterSense focuses on water efficiency, while ENERGY STAR focuses on energy efficiency. Both are recognized by Amazon CPF.
Q: Is annual inspection/renewal required after certification?
A: No. WaterSense certificates have no fixed expiration. However, the EPA conducts random market inspections to ensure consistency.
