This industry comprises government establishments primarily engaged in one or more of the following: (1) the administration, regulation, and enforcement of air and water resource programs; (2) the administration and regulation of solid waste management programs; (3) the administration and regulation of water and air pollution control and prevention programs; (4) the administration and regulation of flood control programs; (5) the administration and regulation of drainage development and water resource consumption programs; (6) the administration and regulation of toxic waste removal and cleanup programs; and (7) coordination of these activities at intergovernmental levels. Illustrative Examples: Environmental protection program administration, public administration Waste management program (except sanitation districts), administration, public administration Pollution control program administration, public administration Water control and quality program administration, public administration Cross-References. Government establishments primarily engaged in-- ? Operating water and irrigation systems--are classified in Industry 221310, Water Supply and Irrigation Systems; ? Administering sanitation districts--are classified in Industry 926130, Regulation and Administration of Communications, Electric, Gas, and Other Utilities; ? Operating sewage treatment facilities--are classified in Industry 221320, Sewage Treatment Facilities; and ? Providing waste collection, treatment, disposal, and/or remediation--are classified in Subsector 562, Waste Management and Remediation Services.