Engineering services for the design, maintenance, and construction of water treatment, distribution and purification plants for served and contaminated waters, design for others in the field of industrial machines and electronic control apparatus; civil engineering for the design of structures for rivers in the nature of dams, water uptake structures, water discharging structures, artificial lakes and lagoons; laboratory analysis services in the field of water quality, namely, water purity analysis, particulate analysis, pigment analysis, color analysis, bacterial analysis; consultation and professional investigation, namely, scientific study and research in the fields of hydraulics for water supply