Environmental protection is a critical part of Charleston Water System's operations. Pollution can have a significant impact on the quality of rivers, lakes, and reservoirs, where many water utilities—including Charleston Water System—obtain raw water for treatment. Runoff and point source pollution can impact the treatment process and in severe cases, may render the water unsuitable for use as a drinking water source.

In addition, strict regulations for wastewater effluent (treated wastewater that is discharged back into a body of water) require Charleston Water System to meet many guidelines to ensure the receiving waters are protected from harmful bacteria. Regardless of state and federal regulations, as a member of the Charleston community and users of the Earth's natural resources, Charleston Water System has a vested interest in maintaining and improving water quality.

With 1,500 miles of water mains and 600 miles of sewer mains—not to mention a water treatment plant, two wastewater treatment plants, an operations center, and two administrative buildings—how does Charleston Water System manage its impacts on the environment?

The answer lies in the implementation of an Environmental Management System, or EMS, which earned Charleston Water System the distinction of becoming the first water or wastewater utility in the United States to earn certification under the International Organization of Standardization (ISO) 14001 Standard for environmental protection.