Frequently Asked Questions

The Deerfield Wastewater Treatment Plant consists of grit handling, primary settling, trickling filters, activated sludge, secondary clarifiers and disinfection facilities. In addition, for sludge handling, we have anaerobic digesters, aerobic digesters and sludge drying beds. We also have excess flow facilities, which include settling basins, disinfection and a storage lagoon. This facility is located on a ten acre site.

After sludge digestion and drying on our sludge drying beds, sludge is stockpiled on site. Once a year, the Village contracts with a licensed sludge hauler, who finds farm fields for land application of the sewage sludge. This is why it is important to flush only human waste to the treatment plant.

Yes. The Village has permits to treat and discharge to the waters of the State of Illinois. This federal program is called the National Pollution Discharge Elimination System and is administered by the Illinois Environmental Protection Agency (IEPA). Our treatment plant and 3 bypass storm treatment facilities have separate permits. The IEPA has the right to inspect our facilities and sample at any time.