This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Water that has been used, as for washing, flushing, or in a manufacturing process, and so contains waste products; sewage.

n. Any water that has been used by some human domestic or industrial activity and, because of that, now contains waste products.

n. water mixed with waste matter

"But a growing concern over a host of other trace chemicals in wastewater has spurred interest in new technologies."

waste    waste material    waste product    waste matter   

sewage   

sewage    effluent    sludge    sewerage    pollutant    groundwater    runoff    biodiesel    microcrystalline    brucellosis