natural treatment systems, constructed wetlands for wastewater treatment, municipal wastewater treatment, industrial wastewater treatment, design of wastewater treatment systems, alternative wastewater treatment, environmental engineering, ecological engineering, energy efficient wastewater treatment, sustainable wastewater treatment and reuse, stormwater treatment, water reuse and recycle, applied biotechnology, irrigation and land application, wildlife habitat, residential wastewater treatment, wastewater reuse, stormwater reuse

nsi is an environmental engineering and science company committed to making clean water using natural systems. we are specialists in wastewater engineering, using constructed wetlands for wastewater treatment.