Septic help for Kalispell and the Flathead Valley

How it works

1. Call or send a request

   Tell us where the property is and what the system is doing.

2. We connect you

   We connect you with an independent septic company that serves that part of the Flathead.

3. They call you back

   The company sets up the visit and prices the job with you directly.

Who uses this service?

Homeowners, buyers and landowners in Kalispell, Evergreen, Whitefish, Columbia Falls, Bigfork and the rural stretches in between. Homes inside Kalispell city limits are mostly on city sewer, but step outside town and septic is the norm. Flathead County officials put the number at roughly 30,000 septic tanks countywide, serving everything from older farmhouses in the Lower Valley to new houses on acreage north of Whitefish. If your property tax or utility bill shows no sewer charge, the house almost certainly has a septic system.

How often should the tank be pumped?

The Flathead City-County Health Department's homeowner handout says to have the tank pumped and the system inspected every three to five years by a licensed contractor, and to keep a record of each visit. Where your home falls in that range depends on the size of the tank, how many people live there, and whether you run a garbage disposal. A pumper can measure the sludge and scum in your tank and tell you when to book the next one. In Montana, septic tank pumpers are licensed by the state Department of Environmental Quality, so ask for the license when you schedule.

What makes the Flathead hard on septic systems?

• Groundwater that rises every spring. The county runs its groundwater monitoring in spring because that's when levels in the valley peak. A drainfield that works fine in August can sit in saturated soil in May.
• Shallow aquifers tied to rivers and lakes. The Montana Bureau of Mines and Geology describes the valley's shallow aquifers and surface waters as interconnected, which is why the county is strict about where drainfields go.
• Long, cold winters. Kalispell's winters are long and snowy, and pumping a tank buried under packed snow is harder than doing it in the fall. Book maintenance before the ground freezes when you can.
• Missed pump-outs. Once solids build up in the tank, they wash out into the drainfield and clog the soil. Replacing a drainfield costs far more than pumping a tank.
• Driving or building over the system. Trucks, trailers, shops and hot tubs on top of the tank or field crack pipes and pack the soil.

What are the warning signs of trouble?

• Toilets and drains that run slow or gurgle all over the house
• Sewage coming up in a shower, tub or basement floor drain
• Wet, spongy ground or standing water over the drainfield
• A strip of grass over the field that grows greener and faster than the rest
• Sewage smell in the yard, especially near the tank lids
• A pump chamber alarm that buzzes or flashes

Why do so many Flathead systems have pumps?

For about two decades, Flathead County required new drainfields to be pressure dosed, which means a pump or siphon pushes effluent out evenly across the whole field instead of letting it trickle into one end. In March 2026 the county commissioners approved changes that allow gravity systems again, but the county still favors pressure dosing, and Montana DEQ's standards call it the method of choice whenever possible. That means plenty of homes here have a pump chamber, floats and an alarm that need attention along with the tank. More on pump and alarm repairs.

Building on raw land?

Get the septic approval before you drill a well or pour a foundation. The county advises this because soil and groundwater conditions can limit where a drainfield can go, and that spot then dictates where the well and house fit. The process runs through the health department's Environmental Health office and usually involves a site evaluation or review, a design from a certified designer or engineer, and a permit before anyone digs. More on new septic systems.

Buying a home on septic?

Ask for an inspection before closing, and look up what the property was actually permitted for. The county lets you request permit records through a land research request, which shows the approved design and the number of bedrooms the system was sized for. If the listing has more bedrooms than the permit, that's worth sorting out before you sign. More on septic inspections.

Are you a septic company?

No. Kalispell Septic Pros is a referral service. We pass your call to an independent septic company that works at your address, and that company quotes the job, does the work and stands behind it. Before hiring anyone, read our tips for choosing a septic company and the Flathead County septic guide.

Areas we cover

• Kalispell and Evergreen
• Whitefish
• Columbia Falls
• Bigfork

Planning ahead? Read our Flathead County septic guide.