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Water Hardness Map

The Water service area, in cooperation with the Engineering Division, maintains this water hardness map to help residents determine settings for new water softeners. The hardness is based on a generalization of hardness for the wells serving the various zones indicated below. Click on the map image to download a PDF map.

Water Quality Report

The City of St. Charles is committed to providing a continuous supply of safe, reliable and economical water to its customers. Every year the City of St. Charles Water Division distributes a report that summarizes the quality of the City’s drinking water. We are pleased to report again this year that your tap water met all Environmental Protection Agency (EPA) drinking water health standards.

Water Conservation

Chicago Metropolitan Agency for Planning (CMAP)

The Chicago Metropolitan Agency for Planning (CMAP) is the official regional planning organization for the northeastern Illinois. The agency has been delegated as the authority for the region's water quality management plan. An integral part of that planning is for water resources. Several publications that are a result of this planning are WATER 2050, GO TO 2040 and a Model Water Conservation Ordinance.