Which environmental concern is monitored by the IDPH?

The correct choice reflects the IDPH's focus on water quality and contamination as a key area of environmental concern. The organization plays a critical role in safeguarding public health by monitoring and assessing water sources to ensure they meet safety standards. This involves testing drinking water supplies and surface water for pollutants, pathogens, and hazardous substances. Ensuring clean and safe water is fundamental to preventing waterborne diseases and protecting community health, which is a primary function of public health agencies like the IDPH.

While air quality and contamination, soil erosion and degradation, and waste management are also important environmental issues, they may fall under the purview of other governmental agencies or local environmental departments rather than being the primary focus of the IDPH. This choice emphasizes the importance of monitoring water systems, as they are vital for health and reflect the agency's commitment to maintaining safe living conditions.