A Ukrainian water bill usually carries two lines: centralised water supply and centralised water disposal (sewerage). There is only one meter — the one on the cold water pipe. No second device measures what leaves the flat, and none could.
Hence the usual question: what is the second charge for, if nobody measured it?
This article is about Ukraine — it cites Ukrainian rules on centralised water supply. Other countries meter and bill wastewater differently, and some do measure it separately.
One number, two charges
The answer is written into the Rules for providing centralised water supply and water disposal services, approved by Resolution No. 690 of the Cabinet of Ministers of Ukraine of 5 July 2019. Clause 22 puts it plainly: the volume of water disposal services provided to a consumer is determined at the level of the volumes of centralised water supply and hot water supply that consumer used.
Wastewater is not measured, then — it is equated to the water that entered the flat. The reasoning is simple: whatever you drew, that much went down the drain. Your water meter is the water-disposal meter as well.
The practical consequence, up front: the water disposal line cannot be reduced on its own. It has no separate lever — it moves with the water supply figure. Using less water lowers both lines at once, and there is no such thing as saving on the sewerage line alone.
Hot water counts too
This is the part of clause 22 most often missed. The volume is determined by water supply and hot water supply. With two meters — cold and hot — sewerage is billed on the sum, not on the cold water alone.
A worked example
The rates below are illustrative: tariffs differ by city and water utility and are revised. Use the ones on your own bill — what matters here is the structure of the calculation, not these figures.
| Line | Volume, m³ | Rate (illustrative) | Amount |
|---|---|---|---|
| Cold water | 6 | 15.00 | 90.00 |
| Hot water | 3 | 110.00 | 330.00 |
| Water disposal | 9 | 12.00 | 108.00 |
The nine cubic metres in the third line are not a measurement — they are 6 + 3 from the two lines above. If the figure on your bill does not equal the sum of your own readings, that is the number to ask about.
When no reading is submitted
Clause 31 of the same Rules governs this, and it has two distinct stages worth telling apart.
The first three months. If readings are not provided within the period set by the contract, for three months the provider takes the consumer's own average daily consumption over the previous 12 months. Where no such history exists — the actual period of consumption, but not less than 15 days.
After three months. The Rules oblige the provider to bill such consumers as consumers whose premises are not equipped with distribution metering units. In plain terms: as though you had no meter at all — by consumption norms set by the local authority. The meter is still there and still counting; nobody knows what it says.
The difference between the two stages matters. For three months you are billed your own average day, which is close to the truth if your usage is steady. A norm has nothing to do with you: it is a figure per person, so if you use less than the norm, the bill rises after the third month without your consumption changing at all.
A missed reading reaches your neighbours — and that part is specific to water
An apartment building has a building-level commercial metering unit, and its volume is distributed among the flats. When one flat submits nothing, its volume is estimated — and the gap between the building meter and the sum of the flats does not disappear. It lands in the distribution.
So the Rules require this: once such a consumer resumes submitting readings, the provider must carry out a redistribution of the volume consumed in the building and a recalculation with that consumer and with all consumers of the building.
This is not a penalty. It is the building's arithmetic finally balancing. But the consequence is worth understanding: one flat's missed readings are not its private business — they spread across the neighbours and then come back as a recalculation. We covered the mechanics of that correction separately, using electricity as the example, and they are the same: the difference does not rewrite the old bill, it arrives as its own line in the next one — see what happens if you do not submit a meter reading.
Verification: how often, and at whose expense
A water meter inside a flat is a distribution metering unit, and the Ukrainian Law "On commercial metering of thermal energy and water supply" (No. 2119-VIII) answers both questions about it.
- How often. Verification follows the interval in the device's technical passport, but at least once every six years for mechanical devices and at least once every nine years for other types. Mechanical means the ordinary impeller meter found in most flats.
- Who pays. Servicing and replacement of distribution metering units are carried out at the expense of the owners of those units, unless a law or the contract says otherwise. The flat's meter is your responsibility, unlike the building's.
- What "servicing" covers. The law defines it broadly: inspection, sealing, periodic verification (including removal, transport and reinstallation), and repair. Removing the device and putting it back is the job of whoever performs the verification, not a separate errand of yours.
- If the meter fails, it must be replaced with a working one and registered within five working days of the failure being discovered.
While the device is away for verification there are no readings — which switches on exactly the clause 31 machinery described above. That is the practical reason not to leave verification until it becomes urgent.
What to do about it
The conclusion is the one every meter conversation reaches: keep your own record of readings. For water it earns its place three times over.
- Checking the bill. The water disposal volume should equal the sum of your cold and hot readings. It is the simplest check on the whole bill and it takes about thirty seconds.
- Knowing what you actually use in a day. That is the figure a missed month gets billed on, and without your own record there is nothing to compare the charge against.
- Making sense of the recalculation. Once readings resume, the volume is recalculated — for you and for the whole building. Whether the figure that arrives adds up can only be judged against your own readings: the ones from before the gap, and the ones after it.
How this looks in Платіжка
"Cold water" and "Hot water" are ready-made metered services in the app: enter the readings and the app works out consumption and the amount. There is a separate "Water — meter subscription fee", because that line on Ukrainian bills follows no formula of its own.
Water disposal is deliberately not in the built-in list — it has no device of its own. If your bill carries it as a separate line, add it as your own service: the app lets you create custom services alongside the built-in ones. Its volume is the same figure as the water, so you enter the same numbers, and where the amount on your bill follows no formula, there is a free-amount tariff for exactly those lines.
History is kept month by month, so a month with no readings is visible at once — and it is the month the recalculation will land on.