Calculator

Water leak savings calculator

Price a continuous leak over a year at your own city’s industrial water and wastewater rate, in Canadian dollars. Flow monitoring finds it in week one.

What it asks for: leak rate (LPM) · hours a day · days a year · water and sewer rate ($/m³). Or just pick your city: we keep the industrial water and sewer rate for 16 of them.

Run the numbers

What a leak costs

The easiest number on this page to check: pick your city, and a leak runs whether or not the factory does.

sets the water and sewer rate below

$4.96/m³ (water $2.63 + wastewater $2.33)

Single uniform volumetric charge; no blocks and no separate industrial rate (2025 was $2.21 + $2.32). Only the fixed daily basic charge varies by meter size, 5/8"x1/2" to 8", and it is excluded, as is the $11.20/month stormwater service fee. The City's page cites By-laws (2019)-20448 and (2016)-20074 and publishes only 2025 and 2026 columns; no 2027 rate is currently posted.

litres per minute
how long it runs; a leak usually runs all of them
how often
dollars per m³, set by the city above, or type your own off the bill

These controls need JavaScript to recalculate. The figures beside them are the worked example at the constants listed below: real arithmetic, just not yours yet. Send us your numbers at and we will run them.

What it costs you

$26,070/yr

  • 5,256cubic metres a year
  • $71.42a day, every day
Annual cost of a continuous leak
YOUR NUMBERS1 LPM: 2,607 $/yr5 LPM: 13,035 $/yr10 LPM: 26,070 $/yr25 LPM: 65,174 $/yr50 LPM: 130,349 $/yr2,60713,03526,07065,174130,349
YOUR INPUTS · YOUR RATES · CANADIAN DOLLARS

Conservative arithmetic, verified against your own utility bills.

The assumptions behind this
  • water.combinedRate · 4.96 $/m³ (water + sewer)City of Guelph 2026 volumetric water ($2.63/m³) + wastewater ($2.33/m³), at guelph.ca/living/environment/water/water-rates/ (re-verified 2026-09-02; the City's page cites By-laws (2019)-20448 and (2016)-20074, and the v4 citation of "(2025)-21165 Table 3" is not supported by it). Guelph is the default because it is where we are; the water-leak calculator carries all sixteen municipalities in src/data/water-rates.json, which range from $2.6665/m³ (London) to $7.0302/m³ (Kitchener). Replaces the v2 placeholder of $4.00/m³, which the entry itself flagged for verification against exactly this schedule.
  • water-rates.json · 16 municipalities, combined industrial water and sewer, September 2026https://guelph.ca/living/environment/water/water-rates/

Water and sewer rates verified against each utility's own published tariff in September 2026, using the industrial/commercial class wherever the utility publishes one; rates typically rise annually.

Every constant used here shows its source under the result.

Where these numbers come from

Every constant, its value, and the document it was read out of.

  • water.combinedRate · 4.96 $/m³ (water + sewer)City of Guelph 2026 volumetric water ($2.63/m³) + wastewater ($2.33/m³), at guelph.ca/living/environment/water/water-rates/ (re-verified 2026-09-02; the City's page cites By-laws (2019)-20448 and (2016)-20074, and the v4 citation of "(2025)-21165 Table 3" is not supported by it). Guelph is the default because it is where we are; the water-leak calculator carries all sixteen municipalities in src/data/water-rates.json, which range from $2.6665/m³ (London) to $7.0302/m³ (Kitchener). Replaces the v2 placeholder of $4.00/m³, which the entry itself flagged for verification against exactly this schedule.
  • water-rates.json · 16 municipalities, combined industrial water and sewer, September 2026Combined marginal cost of one extra cubic metre through the meter: volumetric water + volumetric sewer, on the industrial/commercial (non-residential) tariff where the utility publishes one, and on the single uniform metered rate where it does not. Excludes fixed meter-size service charges, stormwater and fire-protection levies, none of which change when a leak starts. Each city links to its own municipal or utility rate page in the data file; the range runs from $2.6665/m³ (London) to $7.0302/m³ (Kitchener). Water and sewer rates verified against each utility's own published tariff in September 2026, using the industrial/commercial class wherever the utility publishes one; rates typically rise annually.

Want the real number instead of the estimate?

This page gives you an estimate from numbers you already half know. A meter gives you the real one. We will walk your floor, tell you what is worth measuring first, and put a figure on it.

Book a site visitSee the water leak case studies

or call 1-833-QUANTFY (1-833-782-6839)