There can be up to 2 distinct wastewater streams from a Data Center: the domestic wastewater from actions like toilet and sink use, and potentially, industrial cooling wastewater, depending on what the cooling strategy for the building is.  

Industrial wastewater from data centers may be discharged into municipal systems, treated onsite, or reused for irrigation. Facilities must comply with local, state, and federal regulations regarding water use and discharge. 

Water circularity; as shown below is often sought after for data center facilities:Â