Must factories that already test their raw wastewater also test sludge?
There are two options for testing to ensure the detection of any substances present in the ZDHC MRSL:
- Testing of raw wastewater
- Testing of sludge and discharged wastewater
What happens if a supplier does not agree to do the testing?
It will be up to individual brands, whether or not they are ZDHC Contributors, to encourage their value chain to implement the guidelines and undertake testing.
Why does ZDHC require the testing of conventional wastewater parameters for indirect discharge?
ZDHC acknowledges that facilities with indirect discharge will have limits based on agreements with their contracted wastewater treatment plants or local authorities. Indirect discharge suppliers must meet their legal and/or contractual limits. The conventional parameters reported for ZDHC are for informational use only.