A municipal LoRaWAN is the cheapest rung of the sensor ladder: a city can buy radio coverage in about a year, and then spend the following years looking for applications that pay for it. That sentence is not this guide's judgement — it is the lesson recorded on Dortmund's own entry, and the corpus around it bears it out.
This guide reads the documented record of low-power municipal radio networks. What the sensors on them measure is spread across the sensors and IoT guide, water management and flood resilience; the plain-language definition of LoRaWAN itself, and of a sensor network, are in the glossary.
Frankfurt's entry states the pattern outright: the radio network most of the city's smart-city projects run on is not the city's. It belongs to Mainova, the municipal utility, which switched on a citywide network in June 2020 with about twenty gateways and roughly sixty by late 2021. The same shape recurs almost everywhere — Munich's SWM, Zurich's ewz with the municipal IT department, Vienna's Wiener Netze and Wien Energie, targeting 450 gateway locations by 2029.
Dortmund is the variant worth copying. The utility DEW21 reported near-complete outdoor coverage within a year, then founded DOdata — a wholly owned subsidiary co-steered with the city — to run the network and a smart-city data hub under municipal control. The distinctive part is not the antennas but the governance: who decides, later, what the network is allowed to carry.
Coverage maps look like ambition; the payload is modest. Dortmund's concrete workload is around 2,500 water meters. Munich automates roughly fifty groundwater-level stations and streams temperature, current and voltage from substations. Vienna's waste authority tracks its containers across the city in real time. Zurich, with a citywide network in its own data centre and every department invited to use it, reports a 185-space parking pilot and sixteen chair sensors that measured how two public squares are used.
Two entries carry heavier loads and neither is a smart-city programme. New York's FloodNet, run by two universities with city agencies, has passed 265 solar-powered street-level flood sensors reporting depth every minute to a public dashboard. Dublin's Docklands testbed put fifty low-cost gully monitors and rainfall sensors on the network to flag flood risk. In both, the radio is incidental — the point is that somebody has a use for a reading every minute.
The most striking pattern in this corpus is who is using it. Alongside the metropolitan utilities sit Bad Nauheim, Gründau, Alsfeld and Hanau — German towns building their own networks on state funding programmes and putting entirely ordinary things on them: footfall and bin fill levels, parking occupancy in a medieval old town, air pressure and temperature at seven playgrounds. A town that cannot fund a telecom contract can fund a gateway. That is the honest reason this standard exists in the record at all, and it is a better argument for it than any metropolitan deployment here.
Busan is the cautionary entry. Its water authority has been fitting IoT meters over the city's own LoRa network since a 2018 pilot; by December 2025 it reported 101,053 of 365,229 connections on remote meters — 27.7% after seven years, and unevenly distributed, from 98.4% in one district to 6.3% in another. The lesson recorded there generalises: a cheap radio standard picked at pilot stage can outlive its credibility, and Busan was still funding LoRa terminal maintenance well after peer cities had moved to NB-IoT. Osaka reached the same fork differently — it trialled LoRaWAN meters, then narrowband ones, and has kept the citywide decision open rather than committing early.
Gateway counts come from operators and are checkable. Sensor counts often are not. Frankfurt's entry makes the distinction explicitly: the figure of roughly 7,000 sensors that circulates in coverage of the city's network appears in no Mainova release, so the entry reports the gateways and declines the sensors. Winterthur's citizen-run air-quality network shows the opposite discipline at a much smaller scale — its first phase validated exactly three sensors against the official reference station before claiming anything.
Usually the municipal utility rather than the city hall. Frankfurt's runs on Mainova's network, Munich's on SWM's, Zurich's on the city utility ewz with the municipal IT department, Vienna's on Wiener Netze and Wien Energie. Dortmund is the interesting variant: the utility DEW21 founded a wholly owned subsidiary, DOdata, co-steered with the city, to run both the network and the data hub under municipal control.
Far less than the coverage suggests, and almost all of it unglamorous. Dortmund's workload is around 2,500 water meters. Munich automates roughly 50 groundwater-level stations and streams substation readings. Vienna's waste authority GPS-tracks its containers. Zurich, with a citywide network, reports a 185-space parking pilot and sixteen chair sensors that measured how two public squares were used. New York's FloodNet carries the largest documented sensor population, having passed 265 street-level flood sensors.
Because it is the cheapest rung of the sensor ladder and needs no telecom contract. Several German small towns in this atlas — Bad Nauheim, Gründau, Alsfeld, Hanau — built municipal networks on state funding programmes and put ordinary things on them: footfall, bin fill levels, parking occupancy, playground temperature. The technology's centre of gravity in the documented record is municipal, not metropolitan.
Busan is the cautionary case. Its water authority put IoT meters on the city's own LoRa network from a 2018 pilot; by December 2025 it had 101,053 of 365,229 connections on remote meters — 27.7% after seven years, ranging from 98.4% coverage in one district to 6.3% in another — and the entry's own lesson is that a cheap radio standard picked at pilot stage can outlive its credibility, with the authority still funding LoRa terminal maintenance after peer cities had moved to NB-IoT.
Judge a municipal radio network by what it carries, not by how much of the city it covers — and ask who owns it, because that party will decide what it is allowed to carry next. On the evidence here, the standard has earned its place in towns too small for anything else, and has yet to justify itself in a metropolis that already had options.
A LoRaWAN network is coverage in a year for the price of a few dozen gateways, which is why so many cities have one. The interesting questions come afterwards: whose asset it is, and what it actually carries once the pilots are over.
| Project | Since | Status | Outcome | Evidence | Run by | Cost | Owner, and the load it carries |
|---|---|---|---|---|---|---|---|
| Citywide LoRaWAN Network & DOdata HubDortmund, 🇩🇪 | 2019 | Live | Ongoing | Official | Utility or public operator, City government | not public | The utility built it and then founded a subsidiary steered jointly with the city, so urban data stays in municipal hands. The workload is unglamorous: water meters in underground shafts. |
| SWM Citywide LoRaWAN IoT NetworkMunich, 🇩🇪 | 2018 | Live | Ongoing | Media | Utility or public operator | not public | The municipal utility owns it and opened it to outside businesses. Groundwater stations and substations report over it; the waste-container pilots have not been confirmed to scale. |
| Wiener Netze / Wien Energie LoRaWAN Sensor NetworkVienna, 🇦🇹 | 2019 | Live | Ongoing | Official | Utility or public operator | not public | The grid company and the energy utility own it, not the city. The one confirmed city use at scale is the waste authority tracking its containers. |
| Busan Remote Water MeteringBusan, 🇰🇷 | 2018 | Live | Ongoing | Official | Utility or public operator | not public | The city runs its own LoRa network — and a councillor challenged the choice years after peer cities had moved on. A cheap standard picked at pilot stage can outlive its credibility. |