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The most common method of compliance with the CWA is to
prevent process wastewater discharges to waters of the United States. If your discharge does not reach waters of the United States, then there are
no requirements under the CWA. Examples of compliance without a discharge are vacuuming up the process wastewater or berming the process water and allowing it to evaporate. An additional method of compliance is to discharge the water to an NPDES permitted sanitary sewer system (the municipality may have additional pretreatment requirements before accepting your discharge).
The most common form of non-compliance is to discharge the process water into a storm sewer system or into a city street that drains to a storm water inlet. Most storm drainage systems in Region 6 discharge directly to waters of the United States without treatment, which means anything that discharges into a storm drain is the same as putting it directly into the waterbody receiving the storm drain discharge.