Montana septic rules
Septic pumping rules in Montana.
Montana requires a state license or permit to pump or haul septage. Below: who regulates, what pumpers have to keep, and where to find the official forms. Checked against official sources on October 8, 2026.
The rules
What a pumper in Montana should know.
A guide, not legal advice. Counties and local health departments can add their own rules on top of the state's, so check with the county where the system is.
- Who regulates septic systemsState and local
Montana Department of Environmental Quality (DEQ), Solid Waste Management Section, Septic Tank Pumper Program. DEQ licenses septic tank pumpers and inspects septage disposal sites, while residential septic systems are approved by the local health department (county sanitarian), and county health officers or sanitarians sign off on each pumper disposal site.
The state program- Pumper and hauler licensingState license
Anyone in the business of cleaning cesspools, septic tanks, portable toilets, privies, grease traps, car wash sumps or similar works, or disposing of their contents, must hold a DEQ septic tank pumper license (ARM 17.50.803). Licenses expire December 31 each year; renewal applications are due to DEQ by January 31, and renewals after April 1 carry a $125 late fee. A new application needs a separate disposal site application for each site, signed by the county health officer or sanitarian, and a vehicle inspection form for applicants proposing land application.
Licensing details- Where septage can go
Disposal sites must be approved by DEQ and the county. DEQ guidance lists four disposal options: a wastewater treatment plant, a licensed septage processor or composting facility, a licensed Class II landfill for dewatered septage, or a land application site that meets the site and management rules in ARM Title 17, chapter 50, subchapter 8.
Disposal rules- Records and reports
DEQ's Septic Pumper Guide says pumpers must submit disposal records twice a year: by July 15 for January 1 through June 30, and with the annual renewal application for July 1 through December 31, and that DEQ may require monthly records if problems are found. The 2026 renewal form asks for the volume disposed at each approved site and copies of the prior year's records. DEQ provides land application and wastewater treatment summary log forms.
Reporting rules- Inspections
Not confirmed from an official source. Ask the state program linked above, or your county health department.
- The rule book
ARM Title 17, chapter 50, subchapter 8 (septic tank pumper licensing at ARM 17.50.803)
Official forms
Get the forms from the source.
We link to the state's own pages instead of keeping copies, because forms change. Your county may use its own forms as well, and those are the ones an inspector will expect.
In PortaPro
Upload your county's form once. Fill it from every job.
- Your form, filled from the job
Upload the current PDF from your county or the state, place the fields on it, and bind them to job data. Each pump-out fills it with the customer, site, tank, gallons pumped and technician, and you download a finished PDF.
How Regulatory Forms works- Service reports on the driver's phone
Every account comes with a septic inspection checklist and a pumping service report with gallons pumped and a disposal manifest. Drivers fill them on site and they are filed with the job.
PortaPro for septic companies- Prefer paper for now
Print our free septic pumping service report. It has the fields most programs ask for.
Free septic service report
Questions
Do I need a license to pump septic tanks in Montana?
Montana requires a state license or permit to pump or haul septage. Anyone in the business of cleaning cesspools, septic tanks, portable toilets, privies, grease traps, car wash sumps or similar works, or disposing of their contents, must hold a DEQ septic tank pumper license (ARM 17.50.803). Licenses expire December 31 each year; renewal applications are due to DEQ by January 31, and renewals after April 1 carry a $125 late fee. A new application needs a separate disposal site application for each site, signed by the county health officer or sanitarian, and a vehicle inspection form for applicants proposing land application.
Where do I get Montana septic forms?
From the state's own pages, linked on this page. Many counties and local health departments use their own forms on top of the state's, so check with the county where the system is too.
Does PortaPro come with Montana forms built in?
No. Forms change, and counties use their own, so PortaPro doesn't ship copies. You upload the current PDF from your county or state once, place the fields on it, and PortaPro fills it from each job: customer, site, tank, gallons pumped and technician. When the agency updates its form, you upload the new one.
How current is this page?
We read the official sources listed at the bottom on October 8, 2026. Rules and forms change, so treat this as a starting point and confirm with the agency before you rely on it. This is not legal advice.
Sources
Official pages we read on .
- https://www.deq.mt.gov/twr/Programs/septic-tank
- https://www.deq.mt.gov/twr/Programs/solidwaste
- https://deq.mt.gov/files/Land/SolidWaste/Documents/docs/NewSTPApplication2024.pdf
- https://deq.mt.gov/files/Land/SolidWaste/Documents/renewalapplications/STP%20Renewal%202026.pdf
- https://deq.mt.gov/files/Land/SolidWaste/Documents/pumpers/SepticPumperGuideFebruary2011.pdf
- https://deq.mt.gov/files/Land/SolidWaste/Documents/pumpers/CountyGuideforApprovingSeptageLandApplicationSites.pdf
- https://deq.mt.gov/files/Land/SolidWaste/Documents/HomeownerGuideSepticSystems.pdf
- https://deq.mt.gov/files/Land/SolidWaste/Documents/newapplications/STP/STPNewSiteform-2026.pdf
- https://deq.mt.gov/files/land/SolidWaste/documents/pumpers/PumpRecordsLandApplication.doc
Other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Keep the county's paperwork with the job.
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