1. What a “class” is
Topeka does not charge every gallon the same price. The city puts each account into a customer class and publishes a different volume rate for each class.
2026 inside-city water, per 1,000 gallons:
- Single-family: $7.75
- Multifamily: $6.28
- Commercial: $5.99
- Industrial: $5.35
- Industrial II: $5.04
- Irrigation: $9.31
Once Frito-Lay, Mars, or Reser’s is coded Industrial or Industrial II, every thousand gallons that month is billed at that one rate. Ten thousand gallons or ten million gallons — same cents per thousand.
That cheaper industrial number, compared with the house rate, is the class discount. A house pays $7.75. Industrial II pays $5.04. The plant is getting $2.71 off per thousand gallons versus a single-family account. That is not a secret rebate. It is printed in the ordinance.
Topeka staff have said this out loud: historically the city has used a declining rate structure — the more you use (or the class you sit in), the less you pay per gallon.
2. Why “discount”
Three things are being discounted at once.
Versus residential. The plant’s gallon is cheaper than the household gallon on purpose. The political story is usually “large users help pay for the treatment plant and the 900 miles of pipe, so they get a bulk price.” The other story is “we want factories.” Both can be true. The tariff does the same thing either way.
Versus commercial. Industrial and Industrial II sit below commercial. A storefront and a chip plant are not priced the same.
Versus what a “cost of one gallon” story would look like. In a pure cost-of-service world you might still give big meters a break on the fixed charge (a 6-inch meter costs more to read and to size the main for), but you would not automatically make the commodity cheaper just because the customer is labeled industrial. Topeka does both: bigger base charge on a big meter, and a lower volume rate if you qualify for the industrial class.
Industrial II is the extra notch — the city’s cheapest published retail gallon. That is the class a truly large process user wants to be in.
3. Why “predictable”
Predictable means the plant controller can forecast the water line item without a weather model or a winter-average formula.
On the first of the month they know:
- meter size → base charge (fixed)
- class → dollars per thousand gallons (fixed)
- estimated production → gallons
Bill ≈ base + (gallons ÷ 1,000 × class rate)
If they fry 10 percent more potatoes, water cost goes up about 10 percent. If they cut a shift, it goes down about 10 percent. No surprise block. No “you used more than last February, so this thousand gallons just tripled.”
That is what a CFO means by predictable input cost. Electricity has time-of-use and demand charges. Natural gas has index plus transport. Topeka industrial water, as written today, is closer to a catalog price.
4. What it is not
It is not a declining block inside the month.
Some cities say: first 2 million gallons at $X, next 5 million at $Y, over 7 million at $Z. Emporia works that way. Your last gallon is cheaper than your first gallon in that billing period.
Topeka’s discount is by who you are, not by how far you are into this month’s meter. Industrial II at 500,000 gallons pays $5.04. Industrial II at 10,000,000 gallons still pays $5.04. The house next door pays $7.75 on its little meter whether it used 3,000 or 8,000 gallons.
So “the more you use, the cheaper each gallon” is true in Topeka only in this sense: if you can get into a bigger class, your rate is lower. It is not true that a factory’s 10-millionth gallon is cheaper than its first gallon that month.
5. Contrast: the unpredictable structures
This is why the phrase matters when you put Topeka next to Wichita, Hays, Lawrence, or Olathe.
Winter-average / inclining block (Wichita, Hays, parts of Olathe and Lawrence residential).
The city measures what you used in December–February (or a similar window) and calls that your Average Winter Consumption (AWC) or winter quarter average.
- Use up to ~110% of that winter number: cheap block.
- Use 111–310% of winter: middle block (Wichita commercial jumps from $3.83 to $13.36 per thousand).
- Blow past that: third block ($19.55 in Wichita).
For a lawn, that is a conservation tool. Winter use is indoor-only; summer irrigation is the spike; you pay extra for the spike.
For a food plant, winter is not a quiet season. Potatoes, corn, sanitation, and cooling run in January. If the plant runs hard all year, AWC is high, and most months stay in Block 1 — Wichita can look cheaper than Topeka. If they add a line in April, or picnic-season salad volume doubles in June, or a second shift starts, a big slice of the bill can jump from $3.83 to $13.36 overnight. That is not a class discount. That is a usage penalty tied to last winter.
That is the opposite of predictable. The rate on a given gallon depends on a ratio to a past season, not on a published class price.
Inclining residential blocks in Lawrence use the same idea for houses. Their industrial rate is a high flat class rate ($10.33) — predictable, but not a discount versus houses in the same way Topeka’s is. Lawrence industrial is expensive and flat. Topeka industrial is cheap and flat.
6. Worked example (same 10 million gallons)
Assume inside city, volume only, one month.
Topeka Industrial II
10,000 × $5.04 = $50,400
Every month that they use 10 million gallons, same math. Year = 12 × $50,400 = $604,800 water volume, plus base, plus sewer.
Wichita commercial, all inside Block 1
10,000 × $3.83 = $38,300
Looks like a $12,000 win that month.
Wichita, same 10 million, but winter average was only 4 million (plant was down for a rebuild in January–February, then roared back).
- Block 1: 4.4 million gal × $3.83 ≈ $16,850
- Block 2: next 8 million (4.4M to 12.4M of the 110–310% band) — they only have 5.6 million left in the month, all in Block 2: 5,600 × $13.36 ≈ $74,800
- Total ≈ $91,650
Same gallons. Bill more than doubles because last winter was low.
That swing — $38,000 vs $92,000 for identical gallons — is what “not predictable” means. Topeka would have billed $50,400 either way.
7. Who the discount is for, and who pays for it
A class discount is a cross-subsidy argument whether anyone admits it.
If it costs the utility roughly the same to pump, treat, and push the 1,000th gallon to a house or to a plant (the extra cost of a big user is mostly in pipes, pumps, and peak capacity, which show up in the meter base charge), then selling industrial gallons at $5.04 and house gallons at $7.75 means houses are contributing more per gallon toward shared treatment and debt.
That is why Topeka staff, in 2026 rate talks, walked the council through flattening classes — kill Industrial II, then multifamily, then step commercial and industrial up toward the residential commodity rate over several years. They said the current design is the old declining structure: bigger users, bigger discount per gallon.
So “predictable class discount” is also a political object. Industry likes it because the budget line does not jump. Residential advocates dislike it because the plant’s gallon is cheaper than grandma’s. Cost-of-service purists want the discount justified by actual extra cost to serve, not by the label on the account.
8. What the plant actually buys with it
For Frito-Lay, Mars, and Reser’s, the class discount buys three things that matter more than the $2.71 vs. a house:
- A known unit price they can put in a cost model next to oil, corrugated, and labor.
- No conservation-block ambush if Halloween candy or picnic-salad season blows past last winter.
- A published industrial policy. The ordinance says large process users are supposed to pay less per gallon. That is a signal, not just a number.
It does not buy a rate so low that water is free, and it does not make Topeka the cheapest city in Kansas. Emporia’s volume floor and Hutchinson’s large-user block can undercut $5.04. Wichita Block 1 can undercut $5.04. What Topeka sells is cheap enough, and stable.
9. One sentence you can use in the article
Topeka’s industrial rate is a predictable class discount: once the city files you as Industrial or Industrial II, every gallon that month is the same published price, cheaper than a house, with no winter-average trap — unlike Wichita or Hays, where the price of this month’s gallon depends on how much you used last winter.
That is the whole phrase.
