Provides Environmental Health and Building Safety. Clean indoor air enforcement, food sanitation program, housing and nuisance complaints, portable water, private sewage, solid waste, West Nile Vector Monitoring and Prevention, building permits, animal registration, and food borne illness investigations.

Offers help to prevent disease and improve the quality of life in McHenry County. Aims to identify and address environmental concerns that impact human health by providing, public education, investigation of citizen complaints, inspections.

The enforcement of the Public Health Ordinance, specific areas include, food protection, water laboratory, potable water, private sewage treatment and disposal, solid waste management (recycling, response to complaints), public health nuisances, surveillance of West Nile virus, body art, tanning and public beaches.