Need a septic inspection, pumping, a repair or a new system in Manderson, WY? Describe your project once and up to five septic contractors who work in Manderson and Big Horn County get back to you. Free, no obligation.
Manderson has about 89 residents (2024 Census Bureau estimate) and 104 people per sq mi: a rural area. Outside the reach of the public sewer, homes rely on an onsite septic system that needs regular pumping and, when it fails, a repair permitted by the local health department.
Manderson at a glance
- Population (Census Bureau estimate, 2024)
- 89 (+2.3% since 2020)
- Rank in Wyoming
- 91st of 99 cities and towns
- Land area
- 0.9 sq mi
- Population density
- 104 people per sq mi (rural)
- Type
- Town (Manderson town)
- Main county
- Big Horn County
What to check before hiring in Manderson
- Permits: new systems and most repairs in Wyoming need a permit from the state or county health department, often with a soil or percolation test first. Your contractor should handle or explain the paperwork.
- License: septic installers and pumpers are licensed or registered in most states. Ask for the license or registration number.
- Maintenance: the U.S. EPA recommends having a household septic system inspected at least every three years and the tank pumped typically every three to five years.
- Buying a home: a septic inspection before closing tells you the condition of the tank and drain field; some counties require one at sale.
Useful official resources
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U.S. EPA SepticSmart
How septic systems work and how to maintain them.
Services available in Manderson
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Septic inspection
Inspection of the tank and drain field, often requested when a home is sold or by the local health department.
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Septic tank pumping
Pumping the solids out of the tank. EPA notes household tanks are typically pumped every three to five years.
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New septic system design and installation
Soil and percolation testing, system design, permit and installation for a new home or a replacement system.
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Septic repair
Diagnosis and repair of backups, odors, a failing drain field or damaged components.
Frequently asked questions in Manderson
How often should a septic tank be pumped in Manderson?
Typically every three to five years for a household system, according to the U.S. EPA, depending on tank size, household size and water use. An inspection tells you when yours is due.
Do I need a permit to repair or replace a septic system in Wyoming?
Usually yes: new systems and most repairs require a permit from the state or county health department, often after a soil evaluation. Your contractor can tell you what applies to your property in Manderson.
What are the signs of a failing septic system?
Slow drains, gurgling pipes, sewage odors, wet or unusually green spots over the drain field and backups in the house. Have the system inspected quickly: early repairs cost less.
Who will contact me?
Up to five independent septic contractors who serve Manderson, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.