The ZDHC Wastewater Guidelines set a unified expectation for wastewater quality in the textile, apparel and footwear industry. This includes reporting limits for traditional and hazardous chemical parameters, alongside sampling and reporting frequency. By doing so, the Wastewater Guidelines aim to reduce the workload and cost faced by suppliers in satisfying multiple brand-specific testing requirements.

The current version of the Wastewater Guidelines v.1.1, can be found here.