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Location Kenya, Nairobi Province
Central coordinates 37o 1.00' East  1o 14.00' South
IBA criteria A4i
Area 300 ha
Altitude 1,500 m
Year of IBA assessment 2001


Site description The Dandora Oxygenation Ponds are situated 20 km due east of Nairobi City centre, just off the Nairobi–Kangundo road but within the city limits. The main sewage treatment works for Nairobi City, they comprise three experimental ponds, eight facultation ponds and 24 maturation ponds, all bounded by embankments. The first phase of eight ponds was commissioned in 1980, followed by the much larger second phase in 1992. The older set has mud banks, with associated growth of aquatic and emergent macrophytes such as species of Cyperus and Typha; the newer ponds have gently sloping concrete banks. Water quality and the microflora and fauna change as water progresses through the ponds. The treatment is entirely natural and considered environmentally friendly. Processed water from the ponds is discharged into the Nairobi river.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Southern Pochard Netta erythrophthalma winter  1997  1,480 individuals  A4i  Least Concern 


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Artificial wetlands  100%

Land use

Land-use Extent (% of site)
other -

Other biodiversity None known to BirdLife International.

References Nasirwa (1998), Nasirwa and Bennun (1994, 1995), Nasirwa and Owino (2000), Owino and Nasirwa (2001), Oyugi and Owino (1998a,b, 1999), Waiyaki (1992), Waiyaki and Bennun (1993a).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Dandora ponds. Downloaded from on 22/09/2014

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