Founded in 1946, Larkin Group is an engineering consulting firm that provides planning and design services. The firm provides offers biotechnical channel engineering and sludge management services. Larkin Group serves clients in Missouri, Kansas, Oklahoma, Nebraska and Illinois. The company offers construction staking, control, land, hydrographic and topographic surveying services. Larkin Group provides membrane filtration and nitrogen and phosphorus removal services for wastewater treatment plants. The firm offers sewage collection and transportation services for pump stations and force mains. Larkin Group provides planning, evaluation and infiltration analysis services. The firm offers chemical conditioning, flow equalization and screening services. Larkin Group provides stormwater master programming services.