
How Bluebot exposed a $13,000 water billing error—and almost six years of overbilling.
Many water “monitoring” devices on the market don’t actually measure water flow. Instead, they use magnetic or optical readers attached to the city-installed meter, simply digitizing whatever the municipal meter reports.
While this approach can be useful for alerts and trend tracking, it has a critical limitation:
If the city meter is wrong, the data will be wrong too.


