13.- WASH Glossary.

13.-1030. Nudge.

13.-1029. NPK value ( of a fertiliser ).

13.-1028. NPK rating.

13.-1027. Non-return valve.

13.-1026. Non-renewable groundwater.

13.-1025. Non-point source ( NPS ) pollution.

13.-1024. Non-point pollution.

13.-1023. Non-planted filter.

13.-1022. Non-biodegradable wastewater.

13.-1021. Nitrogen.

13.-1020. Nitrogen-immobilisation.

13.-1019. Nitrified.

13.-1018. Nitrification.

13.-1017. Nitrification and distillation of urine.

13.-1016. Nitrates - ( NO3 ).

13.-1015. Night soil.

13.-1014. Networking competences.

13.-1013. NETSSAF - Participatory planning approach.

13.-1012. Net water needed versus gross water applied.

13.-1011. Net positive suction head - ( NPSH ).

13.-1010. Nephelometric turbidity unit - ( NTU ).

13.-1009. Negative externality.

13.-1008. Needs assessment for refugee emergencies - ( NARE ).

13.-1007. Natural water purification.

13.-1006. Natural resource.

13.-1005. Natural organic matter.

13.-1004. Natural coagulant.

13.-1003. Nanofiltration.

12.-1002. Nanofiltration ( NF ) - Reverse Osmosis ( RO ).

13.-1001. Nano-filter.