Czyste
Drawsko
Open, local water-quality monitoring — designed to protect Poland's second-deepest lake. Cheap technology, open data, and know-how that stays in the community.
Born in the community · Stays in the community · Works for the community
A depth no one sees in time.
Lakes degrade quietly. Cyanobacterial blooms, falling oxygen or a pollutant load from inflows often become visible only when it is too late to react. Drawsko — 84 metres deep, the second-deepest in the country — deserves a watchful, continuous eye.
Early warning
The research goal is to catch leading signals — such as conditions favouring cyanobacterial blooms — before they become visible to the naked eye.
Continuous measurement
Instead of single samples once a season — many parameters measured every few minutes, throughout the open-water period, at several points and on an inflow.
No dependency
Instead of a multi-year subscription in which hardware, software and data sit beyond the community's control — technology the municipality owns and maintains itself.
From a cheap sensor
to open data.
The core of this R&D stage is to test whether technology costing a few hundred złoty per node — supported by data analysis — can give a credible picture of water status. The specific choices — the type of sensors, the connectivity — are still the subject of the study. Below is the principle, not a finished product.
Floating sensors
Low-cost measurement buoys built on open hardware read temperature, pH, dissolved oxygen, turbidity and conductivity.
Connectivity without a subscription
Data travels by radio over long distances at minimal power — with no monthly transmission fees. The choice of connectivity is one of the study's questions.
An open data dashboard
A public dashboard shows live readings. The data belongs to the municipality and is meant to be published as open data.
Analysis and early signals
An analytics layer looks for anomalies and verifies whether the cheap sensor set reproduces the readings of a reference probe.
This is how the probe reading will look.
A demonstration of the measurement panel. The weather over the lake is real and fetched live; the remaining values are illustrative — the probe is still being built.
Everything in the open.
Everything reusable.
What sets this project apart from closed commercial solutions: hardware schematics, code, documentation and data are created in the open from day one — under free licenses. Anyone can inspect them, and the municipality can maintain them itself or with any contractor. Nothing is locked in someone's black box.
Open hardware & code
Device designs, software and documentation under open licenses — with no lock-in and no license fees.
Open data
Measurements owned by the municipality, intended for public release — for residents, schools and science.
Zero subscription
No vendor lock-in. When the work ends, the technology keeps working — independently of its author.
Serves every lake.
Openness is not a slogan — it is how the work returns to everyone. Every municipality in Poland, every school, everyone protecting their own environment can take this solution, repeat it and build on it. No license fees, no asking permission, no dependence on a single supplier. Drawsko is the first — not the only one. The same open method — cheap sensors, open data — works anywhere the environment matters: today a lake's water, tomorrow also the air we breathe.
A local initiative,
for the common good.
The project is designed so that its host and owner is the Municipality of Czaplinek — with technology, data and competencies kept on the ground, locally.
Municipality of Czaplinek
Beneficiary and coordinator of the undertaking. The devices, data and decisions on the direction of the lake's monitoring are meant to belong to the municipality.
MAGNET MEDIC
Author of the concept and R&D contractor — Tomasz Fiedoruk, an engineer from Czaplinek specialising in measurement devices, environmental sensors and AI systems.
The road to live water
Concept
Technical documentation, technology selection, research assumptions.
Study & prototypes
Architecture design, construction and integration of research devices.
Measurements on the lake
Launch after the ice melts, a full measurement season, calibration.
Open data & development
A public dashboard, a report, a foundation for education and expansion.
Here, at the bottom, temperature, oxygen and light tell the story of the whole lake. Our goal is to hear it in time.