Administration contact details
Find all the contact and access information of ONAS.
ONAS
Khountou score
88/100Excellent
Response rate
89%
Average processing time
2.1 days
Published responses
312
Reports followed
276
General information
- Full name
- Office National de l’Assainissement du Sénégal (ONAS)
- Acronym
- ONAS
- Status
- Public industrial and commercial institution (EPIC)
- Founded
- 1966
- Sector
- Water & Sanitation
- Mission
- Ensure the sustainable management of the public sanitation service for wastewater, stormwater and drainage.
Head office
- Address
- Route de l’Aéroport Léopold Sédar Senghor, BP 3152, Dakar – Sénégal
- Phone
- +221 33 859 52 00
- contact@onas.sn
- Website
- www.onas.sn
- Opening hours
- Mon – Fri: 07:30 – 16:00
Social networks
Follow ONAS on its official platforms.
- FacebookONAS Sénégal
- X (Twitter)@ONAS_Senegal
- LinkedInONAS Sénégal
- YouTubeONAS Sénégal
- Instagram@onas_senegal
Other offices
Find the contact details of the regional offices and branches.
| Region / City | Address | Phone | |
|---|---|---|---|
| Thiès | Avenue Caen, Thiès | +221 33 951 12 10 | thies@onas.sn |
| Saint-Louis | Rue Castors, Saint-Louis | +221 33 961 18 40 | saintlouis@onas.sn |
| Diourbel | Route de Touba, Diourbel | +221 33 971 24 15 | diourbel@onas.sn |
| Kaolack | Route de Nioro, Kaolack | +221 33 941 32 22 | kaolack@onas.sn |
| Ziguinchor | Quartier Lyndiane, Ziguinchor | +221 33 991 27 60 | ziguinchor@onas.sn |
Ways to contact us
Choose the most suitable channel to reach us.
- PhoneCustomer service available during opening hours
- EmailReply within 24 to 48 working hours
- Online formAvailable on the ONAS website
- Postal mailTo the head office address
- In personVisits by appointment
Access map
Locate the head office of ONAS in Dakar.
ONAS – Head office · Route de l’Aéroport Léopold Sédar Senghor, BP 3152, Dakar – Sénégal
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