Industrial discharge can always create an unfavorable change to the local water source. Industrial discharge, coupled with smokestack emissions, however, may pose a more serious threat to environmental stability and pollutant load over time. Large scale factories and similar operations often use large amounts of water for distilling, cleaning, or flushing machinery and products. This waste water, typically disposed of in large quantities, may often be significantly warmer than the receiving water, increase the water's acidity, and may also contain high particle and/or pollutant loads. Large scale discharge from any land use should be monitored especially during a storm event.

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