Grinders do not replace a septic field. They replace the gravity sewer. Kansas still will not let you dump treated water on the ground. So “no laterals” really means one of four things. Here are the four that are cost-effective enough to put on a plat.

Kansas rule first: surface discharge from an onsite system is illegal without an NPDES permit. KDHE will not issue that permit for one house. So every option either (a) sends the waste to a pipe or a plant, (b) puts a small drip/mound in the soil, or (c) hauls it.

---

1. Grinder pump + small-diameter force main (LPS)
This is the “grinder” people mean.

House waste drops into a 60–100 gallon basin. An E/One, Liberty ProVore, Zoeller, or Myers unit grinds it and pushes slurry through 1.25–2 inch pipe, uphill if needed, to the City main or to a package plant.

• Per-lot station, installed: about $3,000–$8,000 simple, $6,500–$12,000 in hard ground.
• Pump life: roughly 8–15 years. Replacement $1,600–$2,500 for an E/One-class unit.
• Power: on the order of $30–$80/year.
• Collection pipe is cheap compared with gravity sewer. EPA has said pressure collection can cut collection cost 50%+ versus gravity in bad terrain.

Use it when: a City main exists, but it is uphill, across a creek, or 500–2,000 feet away and a gravity interceptor would kill the deal.

Do not pump ground slurry into a septic tank that still has a leach field. It will not settle and it will plug the field.

Topeka hook: this is how you reach an existing main without relocating a trunk sewer. Pair it with the recapture sheet so later lots pay into the force main you built.

---

2. STEP — septic tank + effluent pump (usually the better grinder cousin)
Tank on the lot. No leach field. Liquid only goes down the pipe.

A 1,000–1,500 gallon tank stays in the yard. Solids stay in the tank. A cheap ½-hp effluent pump (Zoeller / Orenco-class) sends clear liquid through the same small force main to the City plant or to a cluster plant.

Compared with grinders on the same street:

	STEP	Grinder
On-lot install	~$8,000–$12,000	~$6,000–$12,000
Pump	~$500–$750, 7–20 yr	~$1,800–$2,300, 8–15 yr
What goes in the pipe	Liquid	Raw slurry
Tank pumping	Every 5–7 years (~$350)	None on lot; plant takes the solids
Load on the City plant	Lower BOD/TSS	Higher

Vendor and town studies keep landing the same way: STEP is usually cheaper to own than grinders over 20 years. One comparison put on-lot capital near $4,400 STEP vs ~$6,000 grinder, with pump swap $650 vs $1,800–$2,000.

Use it when: you are building a small plat and can either tap a City force main or drop a small package plant at the low corner. This is the system that matches TMC 18.35.080 / 18.40.020 “community-type sewage treatment plant.”

Best cost play for a Topeka edge plat.

---

3. Aerobic treatment unit (ATU) + drip — smallest legal “field”
Not zero soil. Tiny soil. No conventional laterals.

Tank + aerator treats the water to a much cleaner standard. Then shallow drip tubing (about 6–12 inches deep) doses a small area. KDHE lists ATUs, sand/textile filters, and drip as approved alternatives when clay, high water, or a small lot kill a standard field.

• Installed: about $10,000–$20,000 per house.
• Electric aerator: roughly $100–$150/year.
• Service contract: $200–$500/year.
• Footprint: a fraction of a conventional lateral field. That is the point on a half-acre Class A lot.

Use it when: you are staying onsite (no City main you can reach) and perc is ugly or the lot is tight. Health Department still has to sign the design. Drip is the stretch that lets 18.40.020 half-acre lots actually work in Shawnee clay.

Brand names staff will recognize: Norweco, Jet, Orenco AdvanTex (textile filter — same idea, often quieter than a bubbler ATU).

---

4. Holding tank (true no-lateral) — cheap to set, expensive to run
TMC 13.20.610 already defines it: nondischarging tank, no lateral, City will take domestic contents at the plant for a fee.

• Install: about $3,000–$6,000.
• Pump-out: often weekly to monthly if it is a full-time house. That bill will eat a subdivision.

Use it when: one house, temporary occupancy, a construction trailer, or a lot you will sewer in 12–24 months. Do not plat 20 lots on holding tanks.

---

What I would actually bid, in order

1. City main within reach, bad grade: STEP force main to the existing sewer. Recapture the pipe.
2. No City main, several lots: STEP or grinder cluster to one package plant (the community plant already named in the code).
3. One or two lots, no pipe coming: ATU + drip, Health Department first under 18.35.080.
4. Bridge year only: holding tank under 13.20.610.

A wastewater lagoon is the rural Kansas fifth option if you have 3+ acres and no neighbors to fight the fence line. Cheap, no laterals, ugly, and it needs land. 

Everything You Wanted to Know About Septic Tanks in Topeka (Or Were Afraid to Ask)

By Henry McClure, MCRE, LLC

September 7, 2026

The hallway story is that you cannot put a septic tank in the city, and that inside the three-mile line the City can make you run sewer no matter what it costs.

That is not what the book says.

Topeka’s own code still has a septic path. Staff treat it like a museum piece. Developers treat it like it was repealed. It was not.

This is the stretch map.

---

1. The city did not ban septic. It wrote a recipe for it.

Class A is every plat inside the city limits. TMC 18.40.010(a).

Class A still has four utility combinations. Two of them are septic or no-public-sewer:

• City water, no public sewer: preliminary plat on half-acre lots, Health Department perc tests each lot, lots laid out so they can be replatted later. TMC 18.40.020(b)(2).
• No City water and no public sewer, private well plus septic: preliminary plat on one-acre lots, perc tests, lots at least 150 feet in any direction, and a plat restriction that laterals stay 25 feet off the property line and off the well. TMC 18.40.020(b)(4).

If septic were illegal in the city, that language would not be there.

Where to push: “Serviced with a public sewer” means the sewer is actually there and can take the flow. It does not mean “a main exists two miles away if you write a six-figure check.” Make staff put in writing whether the tract is serviced or merely could be reached. Those are different sentences.

---

2. The three-mile line is not a sewer-or-nothing zone.

Topeka’s subdivision rules apply inside the city and within three miles. TMC 18.30.020. That is K.S.A. 12-749. It is plat control. It is not a utility franchise.

How the three-mile ground is classified:

• Class B — touches the city, touches a pending annexation, touches a plat that touches the city, or sits on a major thoroughfare inside three miles. TMC 18.40.010(b).
• Class C — everything else inside three miles that does not touch the city and is not on a major thoroughfare. TMC 18.40.010(c).

Class B and C both allow no-public-sewer plats. Lot size follows perc tests. Floor is one acre and 125 feet of frontage when there is no public water and no public sewer. TMC 18.40.020(c)(2) and (c)(4).

The only extra bite on Class B: if the plat touches the city or a pending annexation, the owner files a written consent to annexation with the preliminary plat. TMC 18.40.020(c)(5).

Class C does not require that consent. TMC 18.40.020(d). That is the quiet line in the code. Isolated three-mile ground is the easiest septic case Topeka wrote for itself.

Where to stretch: Do not let a Class C tract get treated like it already lives in the city. It does not. County sanitary rules and KDHE Bulletin 4-2 still govern the tank. The City is regulating the plat, not owning the wastewater.

---

3. The official on-ramp is TMC 18.35.080. Use it first.

Before the preliminary plat is even filed:

• Call Public Works about sewer availability.
• If public sewage systems are not available, the owner or the engineer contacts the Health Department for individual septic or a community-type treatment plant.
• If it is individual septic, request perc tests. Health Department results go to Planning Commission.
• That work is done before the preliminary plat is filed.

That is the code path. Not a variance. Not a favor.

Where to push: Get the “not available” finding on paper before sketch-plan turns into a $400,000 interceptor quote. Once Public Works has said sewer is available, you are arguing uphill. The statute wants the Health Department in the room when sewer is not available. Put them in the room.

---

4. Perc table — TMC 18.40.030. This is the lot-size fight.

Perc rate	Minimum site
1 inch per hour	½ acre
½ inch per hour	1 acre
¼ inch per hour	1½ acres
Slower than ¼ inch	3 acres

Setbacks on every site:

• Tank and lateral to water supply: 50 feet
• Tank and lateral to watercourse: 25 feet
• Tank and lateral to dwelling or property line: 10 feet (Class A no-water/no-sewer plats tighten laterals to 25 feet off the line)

Health Department picks test locations, approves tank and field design, and inspects before occupancy. TMC 18.40.030(d).

Where to stretch: Eastern Shawnee clay will often land you on 1 to 3 acres. That is not a denial. That is the table. If staff say “septic doesn’t work here,” ask for the perc number, not a speech. A community plant — which the code lists next to septic — is the move when lots need to be smaller than the perc table.

---

5. Building permits do not say “public sewer only.”

TMC 14.10.050: no building permit until the City Engineer certifies that facilities are available for sanitary sewage disposal, or there are approved plans and assurance the public improvements will be finished.

“Facilities” is the word. An inspected septic system the Health Department already signed is a facility. So is a community plant.

Where to push: Do not accept “we can’t issue a permit without a sewer main” if 18.40 and 18.35 already sent you to the Health Department. Ask the Engineer to certify the onsite facility, or to put in writing which sentence of 14.10.050 he is using to refuse it.

---

6. Forced connection is narrower than people think.

Inside the city, TMC 13.20.100 does not say “connect if a pipe exists anywhere in the neighborhood.”

Connect when the main or lateral is adjacent to the property and one of these is true:

1. The tank is a public nuisance (Utilities Director decides), or
2. The property changes ownership, or
3. A building permit remodel of the main structure, or
4. Five years after that adjacent sewer was built.

Leak a tank onto the ground and you have a separate violation. TMC 13.20.110. That is fair. A working tank on a lot the sewer does not touch is not a connect-now event.

Where to stretch: “Adjacent” is the fight word. Adjacent means on the property or in the abutting street, not “we can extend it if you pay.” Carry 13.20.100 into the plat meeting. If they cannot call the main adjacent, they cannot call 13.20.100.

Outside the city, City sewer generally wants annexation first. TMC 13.20.220. That cuts both ways. If they will not annex you, they should not pretend you are already on the municipal system.

---

7. You can avoid the plat fight altogether on some ground.

Platting is not required for:

• Agricultural splits of 3 acres or more with no new street. TMC 18.30.020(b)(1).
• Outside the urban growth area: 3 acres, 300 feet of frontage, width/depth no worse than 1:2, existing public road. TMC 18.30.020(b)(2).
• Inside the UGA: 20 acres, same frontage and ratio, existing public road. TMC 18.30.020(b)(3).
• Old legal lots of record.

Those tracts live under county/KDHE onsite rules, not a Topeka sewer main. That is the cleanest septic play in the three-mile area if the land can stay large.

---

8. Three options the code already names. Use all three.

1. Individual septic — perc, Health Department, lot size from the table.
2. Community-type sewage treatment plant — written into 18.40.020 and 18.35.080. Packaged plant, HOA or rural sewer district, built to KDHE. This is how you keep density when individual fields will not fit.
3. Holding tank — defined in TMC 13.20.610 as a nondischarging tank with no lateral. City will take domestic contents at the plant for a fee. Ugly economics. Useful as a temporary or a special-use argument, not a subdivision plan.

Dry sewer stubs and easements on a septic plat are the olive branch. You get to build now. They get a route for a future main without tearing up the street. That is the deal a grown-up city would take.

---

9. Script for the counter

“TMC 18.35.080 says if public sewer is not available I go to the Health Department before preliminary plat. I am asking you to say, in writing, whether this tract is serviced by public sewer today. If it is not, I am filing on the half-acre or one-acre septic track in 18.40.020, with perc under 18.40.030. 13.20.100 only forces a tap when the main is adjacent. I will stub easements for a future main. I am not asking you to invent a rule. I am asking you to use the one you already adopted.”

If they say the Comp Plan or the Urban Growth Area overrides the septic sections, make them show the ordinance that repealed 18.40.020(b)(2) and (b)(4). A plan is not a repeal.

---

Bottom line

County ground can take a tank. City code still lets a tank inside the limits when the sewer is not there. Three-mile Class C is the widest opening. Class B costs you a consent to annex if you touch the city. Class A inside the city is legal on half-acre or one-acre lots if the Health Department will perc it.

The City can still make the process miserable. That is not the same thing as the City having repealed the sections.

Stop asking permission to read the book. Quote it.

—

Henry McClure
MCRE, LLC
3625 SW 29th Street #100, Topeka, KS 66614
785-383-9994

Cite this at the counter: TMC 18.30.020, 18.35.080, 18.40.010, 18.40.020, 18.40.030, 14.10.050, 13.20.100, 13.20.110, 13.20.220, 13.20.610; K.S.A. 12-749; KDHE Bulletin 4-2. 

Stop Making the First Developer Pay for Everyone Else’s Sewer

By Henry McClure, MCRE, LLC

Topeka, Kansas
September 7, 2026

Topeka has a habit. If you are the first one to build, you pay for the pipe. Then the City takes the pipe, bills every house that taps it for the next fifty years, and the next three plats connect like they invented gravity.

That is not “protecting taxpayers.” That is making one private party capitalize a public system and then walking away from the revenue.

What is actually commonplace

On-site laterals and in-plat mains? Developer pays. That is normal. Almost every city in the country works that way.

Off-site sewer to reach the tract? The first developer usually advances the money. Growth cities then do one of three things: they pay the oversize, they recapture from later connectors, or they put public money to the edge of the site because they want the tax base.

Topeka often stops at the first sentence and skips the rest. The 2015 outside-city water and sewer rule is blunt: the total cost of extending sewer, including interceptors, “shall be borne by the developer without any participation by the City of Topeka.” No recapture. No oversize share. No tap-fee refund.

Washington State has a 20-year latecomer statute. Texas cities refund connection fees until the extension cost is recovered. Kansas rural water districts already run 20-year refund contracts. Whitfield County, Georgia put $900,000 of public money to the edge of a housing site. Bartlett, Tennessee spent more than $4 million to unlock an industrial corridor.

Kansas already has the same idea under other names: RHID, TIF, CID, and sewer benefit districts. We just refuse to use them for the person who actually laid the pipe.

Topeka’s own code is less harsh than staff practice

Read the book, not the hallway conversation.

• In-plat laterals: developer pays. TMC 18.45.070(a). Fine.
• A main that serves more than one plat: Council may form a benefit district and special-assess the land that benefits. TMC 18.45.070(b). That tool exists. It is almost never used in the first developer’s favor.
• Connection fees: the City Manager can waive up to 25 percent for an economic-development project. Governing Body can waive more. TMC 13.20.680. Underused.
• Forced connection inside the city is not “the pipe is 200 feet away.” It triggers when the sewer is adjacent and the tank is a nuisance, the property sells, there is a building-permit remodel, or five years have passed after the sewer was built. TMC 13.20.100.
• Septic is still on the books. If public sewer is not available, Class A and C plats may use onsite systems with lot size set by perc test. TMC 18.40.020 and 18.40.030. Building permits require certified sewage disposal — public or approved onsite. TMC 14.10.050.

In unincorporated Shawnee County you can put in a septic tank that meets KDHE Bulletin 4-2. Cross the three-mile line or the city limit and you are told the only answer is a six-figure relocation. That is policy, not physics. K.S.A. 12-749 lets the city apply subdivision rules in the extra-territorial area. It does not require the city to ban the same wastewater system the county permits a half-mile away.

“I move the line. I recover the cost.”

I am not asking Topeka to hand me the entire sewer utility’s monthly bills. Those rates cover the plant and the existing system.

I am asking for every dollar created by the pipe I paid for.

A real recapture ordinance looks like this:

1. I design and build the off-site main — or relocate it — to City standards, post the bond, and dedicate it.
2. The City records a Recapture Area on every parcel that can tap that main or sit upstream of a lift station I funded.
3. Nobody later connects without paying a latecomer fee: their fair share of documented cost plus simple interest. City collects it at permit. City remits it to the original developer.
4. The City refunds its own system connection fee on every tap on that extension until principal plus interest is retired, or 20 years, whichever comes first.
5. If the City made me oversize or relocate for system reasons, it pays the incremental cost at acceptance. Not “subject to available CIP funds.”
6. If the main serves more than one owner, use the benefit district already sitting in TMC 18.45.070 so the neighbors stop free-riding.

Want the clean legal version of “I get the sewer income until I’m whole”? Put a surcharge only on the new customers on that extension and pledge it until the certified cost is retired. That does not raid the existing rate base.

Pair it with RHID. State law already lets property-tax increment reimburse sanitary sewer for up to 25 years. That is not a gift. That is the Legislature telling cities how to pay for growth without bankrupting the first mover.

Septic when the pipe is too far

Other Kansas cities use a distance test — 200 to 500 feet — and allow a private system beyond that, with a recorded duty to connect later.

Topeka should publish a cost cap. If the public main is not adjacent and the engineer’s cost to extend or relocate exceeds, say, $8,000 to $12,000 per lot, indexed, then a KDHE-standard onsite system is an approved alternative inside the city and the three-mile area. Lot size follows the perc table already in TMC 18.40.030. The plat carries a covenant to connect later under TMC 13.20.100.

In the extra-territorial area, require dry easements and stub-outs so a future main can go in without tearing up the street. Do not impose a sewer-or-nothing rule the county does not impose.

A failing tank is already a connect-now event. Nobody is asking to legalize cesspools. We are asking the City to stop using “someday sewer” as a veto on otherwise buildable land.

Five votes

1. Adopt a 20-year sewer recapture / latecomer ordinance. City collects. City remits. Admin fee capped at 5 percent.
2. Strike “without any participation by the City” from the 2015 extension rule. Developer advances standard-size cost. City pays documented oversize and City-required relocation.
3. Use the benefit district already in the code for off-site mains that serve more than one owner.
4. Adopt the cost-feasibility septic alternative above.
5. Hand every applicant a one-page “who pays” matrix at sketch plan. Ambiguity is a tax.

The line at the dais

The City will own the pipe. The City will bill every house on it for fifty years. The first developer should not donate that pipe and then watch the next three plats tap it for a fee the City keeps.

Recapture is not a giveaway. Benefit districts are already in the code. Septic on a perc-tested acre is already in the code. RHID is already state law.

What is missing is the will to use the tools instead of defaulting to “developer pays all, City keeps all.”

Topeka does not have to become Austin. It has to become a Midwestern city that wants the next subdivision badly enough to stop making the first mover finance the public system for free.

That is the whole argument.

—

Henry McClure
MCRE, LLC
3625 SW 29th Street #100, Topeka, KS 66614
785-383-9994

Citations for staff who will ask: TMC 13.20.100, 13.20.220, 13.20.680, 14.10.050, 18.40.020–030, 18.45.070; Topeka Ord. Water-Sewer Outside City Limits (2015); K.S.A. 12-715b, 12-749; KDHE Bulletin 4-2; Wash. Rev. Code ch. 35.91; Kansas RHID Act, K.S.A. 12-5241 et seq. 

#mcre1