Kwiminyaka edlulileyo ye-40-plus, i-NLB iphuhlise izisombululo zejethi yamanzi kwizicelo ezininzi kunokuba sinokuzibala. Kwimizila yensimbi kunye neziseko, izityalo zokuvelisa kunye neebhaka, iijethi zamanzi ezinoxinzelelo oluphezulu zinegalelo kumgangatho kunye nemveliso yonke imihla.
I-NLB inethala leencwadi elikhuluIibhulethi zeSicelo seMvelisoekhoyo ukuze ufunde ngakumbi malunga neendlela zokuthi ukujelwa kwamanzi kunokukunceda. Ukuba isicelo sakho asikho phakathi kwabo, sitsalele umnxeba… siyathanda ukufumana iindlela ezintsha zokwenza amanzi akusebenzele.
