Heerhugowaard, City of the Sun, the water purification system with the phosphating pond with which the polder water is purified if the water level of the water system becomes too low | 306155

Heerhugowaard, City of the Sun, has its own water system that is fed by rainwater from the roofs of the district, if the water level drops too much, the polder water is let in through a water purification system in which the water is a the dephosphation pond...© 14 sept 2019 Aerophoto-Schiphol Aerial Photography