French local authorities face a difficult equation: cutting operating costs, accelerating their ecological transition, and maintaining quality public services. To address this, a growing number of territories are relying on field data from connected sensors.
According to the Observatory for Connected and Sustainable Territories, several areas now concentrate the most significant returns on investment: water management, building energy performance, public lighting, waste collection optimisation, and risk prevention. This guide details the most widely deployed use cases, their measured benefits, and the conditions for successful implementation.
For a full overview, see our complete guide to connected and sustainable territories.
Table of contents
- Smart Water Management: Detecting Leaks Before They Cost You
- Public Buildings: Managing Energy and Meeting Regulatory Obligations
- Connected Public Lighting: Lighting Right, at the Right Time
- Waste Management: Collecting Less Often, but at the Right Time
- Risk Prevention and Mobility: Strengthening Territorial Resilience
- Heritage Management: Preserving Historic Buildings and Optimising Spaces
- From Data to Decisions: Why Hypervision Changes the Game
- Why Local Authorities Choose Kuzzle's Platform
- Frequently Asked Questions About IoT for Connected Territories
Smart Water Management: Detecting Leaks Before They Cost You
Connected water network management is one of the first levers of action for smart territories. In France, the average efficiency of drinking water networks plateaus at around 80%, meaning one litre in five is lost before reaching the tap. For a local authority, these losses represent a direct financial shortfall and an unacceptable waste of resources amid growing water stress.
What IoT Enables in Practice
Remote meter reading, combined with acoustic leak-detection sensors and pressure probes, enables real-time consumption monitoring and immediate identification of anomalies. Technical teams shift from reactive intervention (fixing a leak reported by a resident) to preventive maintenance (detecting a micro-leak before it becomes critical).
In flood-prone territories, sensors installed along rivers can anticipate flooding several hours in advance. The Alès urban area, in the Gard department, uses this type of system to strengthen resident safety and infrastructure resilience against Cévenol flash floods.
Measured Benefits
- 5 to 15 percentage points of improvement in network efficiency, depending on the territory
- Reduced response time on leaks (from several days to a few hours)
- Accurate, usage-based billing, building trust and fairness
- National projection: 811 million m³ saved by 2035 if France's Water Plan targets are met
Point to Watch
Remote meter reading only delivers results if the data feeds into a platform capable of putting it to use. Without a centralised supervision tool, alerts get lost in email inboxes and the gains remain theoretical.
Public Buildings: Managing Energy and Meeting Regulatory Obligations
France's "décret tertiaire" requires buildings over 1,000 m² to progressively cut their energy consumption: -40% by 2030, -50% by 2040, -60% by 2050. Since 2025, the "décret BACS" (Building Automation and Control Systems) has made it mandatory to install building management systems (BMS) for tertiary sites over 290 kW.
What IoT Enables in Practice
Temperature, humidity, CO₂, and presence sensors adjust heating, ventilation, and air conditioning based on actual room occupancy. No more heating an empty meeting room at full power, or air conditioning running over the weekend.
The Alès urban area now supervises over 100 public buildings (schools, nurseries, museums, administrative buildings) through a centralised hypervision platform. Electricity and gas consumption data is automatically retrieved via the Enedis and GRDF APIs, with no manual re-entry. Facility managers get a consolidated view that lets them prioritise renovations on the most energy-intensive buildings.
Measured Benefits
- 15% to 25% reduction in energy consumption on equipped buildings
- Compliance with the "décret tertiaire" through automated reporting on the OPERAT platform
- Improved occupant comfort (air quality, stable temperature)
- Early detection of drift (heating leaks, HVAC malfunctions)
What Hypervision Adds on Top
Beyond technical supervision, hypervision lets you cross-reference energy data with other business indicators: occupancy rates, school calendars, weather conditions. This cross-functional view turns raw data into decision support for elected officials and senior management.
Connected Public Lighting: Lighting Right, at the Right Time
Public lighting accounts for an average of 40% of a municipality's electricity bill and up to 20% of its overall energy budget. It's also one of the areas where savings can be achieved fastest.
What IoT Enables in Practice
Remote control of lighting cabinets and light points allows brightness to be adjusted according to time of day, footfall, and weather conditions. Fixtures can be dimmed (reducing intensity by 30% to 70% in the dead of night) or even switched off in low-traffic areas.
Presence sensors enable on-demand lighting along footpaths or in car parks: the light turns on as a person approaches and returns to a minimal level once they've passed.
Measured Benefits
- 30% to 50% reduction in the public lighting electricity bill
- Reduced light pollution, a growing concern for biodiversity and quality of life
- Automatic fault detection (failed lamp, faulty cabinet) and optimised maintenance
- Extended equipment lifespan thanks to dimming
Case Study
The SIEA (the Ain inter-municipal energy and e-communication syndicate), which covers 393 municipalities, deployed a lighting and air quality supervision platform across its public infrastructure. Result: up to 20% in observed energy savings on equipped sites, with centralised management that simplifies the work of technical teams.
Waste Management: Collecting Less Often, but at the Right Time
Waste collection is a major expense for inter-municipal bodies, and a significant source of CO₂ emissions from collection trucks. Traditionally, routes are planned on a fixed schedule, regardless of how full the containers actually are.
What IoT Enables in Practice
Ultrasonic sensors installed in bins or drop-off columns measure fill levels in real time. The data feeds into a platform that optimises routes: trucks only pass by when needed.
In territories with strong seasonal tourism, this approach prevents overflow during peak season (a source of nuisance and reputational damage) while reducing unnecessary trips during the off-season.
Measured Benefits
- 20% to 30% reduction in distance travelled by collection trucks
- Proportional decrease in CO₂ emissions and vehicle wear
- Fewer overflows and cleaner streets
- Better allocation of field teams
Point to Watch
Route optimisation only works if fill-level data is reliable. Sensors need to be matched to the container type (underground, above-ground, compactor) and regularly maintained. The platform must be able to handle exceptions (public holidays, events, incidents).
Risk Prevention and Mobility: Strengthening Territorial Resilience
IoT is playing a growing role in environmental risk prevention and improving urban mobility, two issues that are becoming more pressing as climate change progresses.
Early Fire Detection
Video-detection and image-analysis systems, combined with weather and air quality sensors, can identify the start of a forest fire within minutes. This early detection capability limits the scale of disasters and speeds up emergency response. The TCD Observatory estimates these technologies could help preserve 42,500 hectares of forest by 2035.
Smart Parking
Presence sensors installed on parking spaces (accessible spaces, delivery zones, regulated areas) inform drivers of available spots in real time via guidance signage or mobile apps. This solution reduces traffic caused by drivers searching for parking (up to 30% of city-centre traffic according to some studies), smooths traffic flow, and improves air quality.
Air Quality Monitoring
Connected monitoring stations continuously track levels of fine particulates, ozone, and nitrogen dioxide. The data feeds public dashboards and triggers alerts in the event of pollution spikes.
Heritage Management: Preserving Historic Buildings and Optimising Spaces
IoT also offers solutions for managing built heritage, whether administrative, cultural, or historic.
Occupancy Measurement and Flow Counting
Presence and counting sensors reveal actual footfall in spaces: meeting rooms, reception halls, sports facilities. This data helps managers adapt maintenance, lighting, and air conditioning to actual usage, and to size future equipment accordingly.
Indoor Air Quality and Collection Preservation
In museums and heritage buildings, indoor air quality is essential not only for occupant health but also for preserving collections. Sensors continuously measure humidity, temperature, and fine particulates. The Musée des Beaux-Arts in Nice deployed an IoT system that automatically controls ventilation and air conditioning to maintain stable conditions, essential for preserving artworks.
Structural Health Monitoring
Vibration, cracking, and tilt sensors help monitor the condition of listed or ageing buildings. Early alerts prevent costly deterioration and keep occupants safe.
From Data to Decisions: Why Hypervision Changes the Game
Deploying sensors isn't enough. Real value emerges when data is centralised, cross-referenced, and presented clearly to decision-makers.
IoT Platform vs. Hypervision: Two Complementary Building Blocks
The IoT platform is the technical foundation. It collects sensor data regardless of manufacturer or protocol, decodes it, stores its history, and makes it available via APIs. It's the tool used by technical teams supervising the fleet of connected equipment.
Hypervision sits above it, as the decision-making layer. It aggregates IoT data with other sources (business software, GIS, billing systems) and presents it in unified dashboards. It's the tool used by senior management, elected officials, and department heads who steer the territory's performance.
What Hypervision Delivers in Practice
- Cross-functional view: cross-reference water, energy, waste, and mobility data in a single interface, instead of juggling ten different business tools.
- Actionable indicators: turn raw data flows into readable KPIs and dynamic maps.
- Smart alerts: trigger targeted notifications when anomalies occur, without flooding teams with false alarms.
- Prioritisation support: identify the most energy-intensive buildings, the most fragile sections of the water network, or the collection routes that most need optimising.
The Data Silo Trap
Without hypervision, each department stays locked into its own business tool. The data exists, but no one has the full picture. Decisions get made on intuition rather than data. The investment in sensors only delivers a fraction of its potential value.
Why Local Authorities Choose Kuzzle's Platform
To fully harness the potential of IoT and territorial hypervision, local authorities need a solution capable of aggregating heterogeneous data, securing it, and putting it to work over the long term.
A Sovereign, Interoperable Platform
Kuzzle is a French, open-source IoT and Hypervision platform, designed for public sector organisations. It connects to any sensor (LoRaWAN, Sigfox, MQTT, 4G/5G, third-party APIs) and integrates with existing business software. Local authorities retain full control of their data, with no vendor lock-in.
An Architecture Built for Resource Pooling
Kuzzle's multi-tenant architecture lets a regional syndicate or inter-municipal structure manage several local authorities on a single instance, with strict access separation. Each municipality sees only its own data, while benefiting from shared infrastructure and pooled expertise.
Fast, Scalable Deployments
The Côte-d'Or Department deployed a full demonstrator in 45 days as part of the Smart Côte d'Or project: 200 sensors across 8,200 m², covering 6 use cases (room occupancy, solar monitoring, air quality, etc.). This model is designed to be replicated across the department's 150 buildings.
Hosting Flexibility
Sovereign French cloud or on-premise deployment: local authorities choose the mode that fits their security policy and GDPR requirements.
Frequently Asked Questions About IoT for Connected Territories
What budget should be planned for a first IoT project?
There's no single answer. A pilot on a few buildings can start with a few tens of thousands of euros. Scaling up represents a larger investment, but the resulting savings (energy, maintenance, route optimisation) generally deliver a return on investment within 2 to 4 years.
Do you need in-house technical skills?
Not necessarily. Local authorities that rely on a syndicate or pooling structure benefit from shared technical expertise. For those wanting to bring skills in-house, a gradual upskilling path is possible thanks to open-source solutions that avoid vendor dependency.
How long does it take to deploy a first use case?
A pilot can be up and running within 1 to 3 months, depending on complexity. The Smart Côte d'Or project deployed a full demonstrator in 45 days. Scaling up then takes 6 to 18 months depending on scope.
How can vendor lock-in be avoided?
By choosing an open, interoperable platform capable of connecting sensors from different manufacturers and integrating with existing systems. Open-source solutions guarantee complete independence from any single vendor.
Is resource pooling essential for small municipalities?
It isn't mandatory, but it's strongly recommended. Digital or energy syndicates cover the initial investment and offer a catalogue of services at a shared cost. A municipality of 500 residents can thus benefit from the same tools as a major city, without bearing the investment alone.
Taking Action
The territories that succeed in their digital transformation aren't the ones that deploy the most sensors. They're the ones that turn their data into decisions. The combination of a robust IoT platform and hypervision tailored to local authorities' needs forms the foundation of that transformation.
Kuzzle supports local authorities at every stage, from defining priority use cases through to scaling up, with a sovereign, interoperable, and scalable solution.
