Watsan matters

13.-1166. Post-construction support.

13.-1165. Positive displacement pump.

13.-1164. Portland cement - ( OPC ).

13.-1163. Porous and sectioned pipes.

13.-1162. Porosity.

13.-1161. Porosity, secondary.

13.-1160. Porosity, primary.

13.-1159. Pores.

13.-1158. Population equivalent.

13.-1157. Ponds, lakes and reservoirs.

13.-1156. Pond.

13.-1155. Polyphoshate-accumulating Organism - ( PAO ).

13.-1154. Polygeneration plant.

13.-1153. Polychlorinated biphenyls - ( PCBs ).

13.-1152. Pollution.

13.-1151. Pollination.

13.-1150. Polishing pond.

13.-1149. Point-source collection.

13.-1148. Point of use - ( POU ).

13.-1147. Point of entry - ( POE ).

13.-1145. Point of use - ( POU ).

13.-1146. Point source of contamination.

13.-1144. Point of use - ( POU ) - chlorination.

13.-1143. Point of supply - chlorination.

13.-1142. Point of collection - abstraction.

13.-1141. Plug-flow reactor - ( PFR ).

13.-1140. Platform.

13.-1139. Plateau.

13.-1138. Planting pits.

13.-1137. Planted drying beds.