What it monitors
Sewer level
How full each pipe is
Flow rate
Litres per second
Blockages
Level up, flow down
Rainfall
48-hour forecast
Citizen reports
Text, voice, photo, video
1 critical, 2 warnings
5 not reporting
Oldest open since 04:12
Eastleigh North
Urgent alerts
Sample- Criticalsince 04:12
Eastleigh North: Suspected blockage
Level 97% · Overflow possible in ~25 min
- Warningsince 04:21
Mathare: Level rising steadily
Level 74% · Surcharge in ~2 h if unchanged
- Warningsince 04:26
Kariobangi South: Level rising steadily
Level 71% · Surcharge in ~2.5 h if unchanged
- Watchsince 04:33
Industrial Area: Flow has stopped
Level 10% · Review within the hour
Weather and flood outlook
Rain is the thing that turns a slow drain into an overflow.
Heavy rain warning
Next 48 hoursHeavy rain is forecast. Drains and low-lying wards can overflow quickly.
- Peak rate
- 11.4 mm/h
- Next 24 h
- 36 mm
- Next 48 h
- 36 mm
- Chance of rain
- 80%
around 00:00
total rainfall
total rainfall
highest in 24 h
Wards most exposed to this rain
- Overflow likely
Eastleigh North
Already at 97% and rain is coming
- Overflow likely
Mathare
Already at 74% and rain is coming
- Overflow likely
Kariobangi South
Already at 71% and rain is coming
- Flood risk
Kibera
Low-lying, close to the rivers
- Low
Nairobi CBD
Low rain exposure
FlowGuard Nairobi compares the forecast with each ward's sensor level. Rain on a ward that is already filling is the combination to act on first.
Before the rain
Heavy rain forecast raises the alert level and flags wards that are already filling, so crews can be placed before it falls.
While it rains
A fast jump in sensor level during rainfall points to water entering the sewer, or a street flooding above a manhole.
After the rain
Levels that stay high once the rain stops suggest a blockage holding water back. That ward goes to the top of the list.
Rainfall comes from the free Open-Meteo forecast for central Nairobi. Sensor levels are illustrative sample data, and the flood ratings are simple rainfall rules, not a flood model.
~25 min
Sample warning time before the Eastleigh manhole could overflow. Enough to send a crew, not just clean up after. Illustrative figure.
Our mission
Two doors into FlowGuard Nairobi
Citizen portal
See sewage on the street or smell something wrong? Tell us by text, voice note, photo or video. No account needed. You get a reference number.
Report a problemStaff portal
For authorised personnel only. Sign in with a password, Google, or an SMS or WhatsApp code. Sensor data, alerts and citizen reports sit behind sign-in. There is no public sign-up: administrators invite their own team.
Staff sign inHow it works
Raw readings in, a plain answer out. No one on shift should have to read a graph to know whether a street is about to flood.
- Step 1
Sensors report
Level and flow readings arrive from manholes across the network.
- Step 2
Readings become health
Each node turns green, amber or red against its own normal range.
- Step 3
Blockages are spotted
Rising level with falling flow is the signature of a blocked pipe.
- Step 4
Teams are warned early
Alerts name the place, the likely cause and the time left.
From pipe to decision, in minutes.
Key benefits
- Spots likely blockages before a manhole overflows
- Gives teams the place, the cause and the time left
- Combines rain forecasts with sensor levels
- Lets residents report problems by text, voice, photo or video
- Keeps sensitive data behind staff sign-in
Wards ranked by risk
Sample figures| Ward | Sensors | Health | Open alerts | Level, last 24 h |
|---|---|---|---|---|
| Eastleigh North | 14 | 41 | 3 | |
| Kariobangi South | 11 | 63 | 2 | |
| Mathare | 16 | 68 | 2 | |
| Embakasi Central | 18 | 79 | 1 | |
| Industrial Area | 22 | 83 | 1 | |
| Kibera | 19 | 91 | 0 | |
| Westlands | 15 | 96 | 0 | |
| Nairobi CBD | 21 | 97 | 0 |