13.-0550. Facultative pond.

13.- WASH Glossary.
13.-0549. Facies.
13.-0548. F-diagram.
13.-0547. External water.
13.-0546. External combustion engine.
13.-0545. Exploring tools.
13.-0544. Exploitation.
13.-0543. Exogenous bacteria.
13.-0542. Exhaustion.
13.-0541. Executing.
13.-0540. Excreta.
13.-0539. Exceedance.
13.-0538. Ex-situ target population.
13.-0537. Evapotranspiration - ( ET ).
13.-0536. Evaporite.
13.-0535. Evaporation.
13.-0534. Evaporation bed.
13.-0533. Eutrophication.
13.-0532. Estuary.
13.-0531. Erosion.
13.-0530. Equitable.
13.-0529. Epidemiological studies.
13.-0528. Epidemic.
13.-0527. Environmental sanitation.
13.-0526. Environmental issues.
13.-0525. Environmental impact.
13.-0524. Environmental impact assessment - ( EIA ).
13.-0523. Environmental flow.
13.-0522. Environmental degradation.
13.-0521. Enterotoxigenic escherichia coli - ( ETEC ).