Deployment 001 · Freetown, Sierra Leone
Freetown Air Quality Intelligence Programme
A twelve-month programme with Freetown City Council, formalised through an MOU signed by the Mayor, with FengHeng as Delivery Partner. One verified record over the city’s twelve-station air-quality sensor network — feeding four applications, from the public page to the Mayor’s brief.
Twelve stations. One trusted record.
The city already operated the sensors. What it lacked was the layer that makes their readings decision-grade. We synchronise the network daily, run every reading through the rulebook, and maintain a rolling analytical window — so the record is current, checked, and defensible.
The engagement, on the record.
One infrastructure, four uses.
Four applications consume the same checked record — each tuned to a different reader, from the citizen to the Mayor.
APublic page
One trusted number and one honest sentence for every station — clear, accessible information for the city’s residents.
BMayor’s brief
A regular, decision-ready briefing for the executive: what changed, what it means, what needs attention.
CAnalytics view
The checked record with full history — for planners, programme teams and technical staff who need to go deeper.
DMaintenance layer
Station health, fault detection and network operations — the internal instrument panel that keeps the record honest.
53 days of a label. Nine days of an answer.
Before the programme, one station sat in a vendor feed marked “calibrated-ready” — for 53 days, while producing no valid data. The vendor’s own quality control never caught it. Our independent rulebook did, on day one of review. Two days later the finding was with the city; nine days after that, the vendor formally confirmed the fault.
The second city will be faster.
Freetown is the first deployment, not the destination. Everything the programme produces — the structured library, the rulebook, the delivery loop — carries forward. The second deployment starts from a running foundation, and inherits every rule the first one wrote.
We claim exactly what exists. One deployment, honestly delivered. The next one, faster.