Hoogheemraadschap van Rijnland is the Rijnland Regional Water Authority responsible for ensuring clean water and protecting against flooding in the provinces of North Holland and South Holland in the Netherlands. Covering an area of 1,100 square kilometers, Rijnland serves 1. 3 million people living, working, and enjoying recreational activities in the region.

With a focus on flood protection, Rijnland maintains the dunes, dikes, and embankments to safeguard against inundation. Additionally, they are dedicated to maintaining water quality, providing a suitable habitat for plants and animals, and ensuring proper water management throughout the area. Rijnland also oversees waste water treatment plants, processing waste water from homes and businesses.

However, the provision of drinking water falls under the responsibility of water companies, while local councils and provinces handle groundwater matters. With a commitment to safety and environmental stewardship, Rijnland plays a vital role in preserving the region's natural resources and protecting its residents from the risks of flooding