A perc test determines whether soil can safely absorb wastewater from a septic system. It is a critical step for many construction projects, septic replacements, and drainfield evaluations across many parts of Southeast Michigan.
Al Pearson and Son provides professional percolation testing for homeowners, builders, and property owners who need clear answers before permits can be approved or work can begin.
What Is a Perc Test ?
A perc test measures how quickly water drains through soil. The results help local health departments determine if a property can support a septic system and what type of system may be allowed.
Soil that drains too slowly can cause septic systems to fail. Soil that drains too quickly may not properly treat wastewater. Perc testing helps ensure systems are designed correctly for long term performance.
Why Perc Testing Is Important
Perc testing protects homeowners from installing systems that are likely to fail. It also protects groundwater, nearby properties, and public health.
A proper perc test helps:
- Prevent premature septic system failure
- Avoid sewage surfacing or backups
- Ensure permit approval
- Guide proper system design
- Reduce long term repair and replacement costs
Without a passing perc test, most septic permits cannot be issued.
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When a Perc Test Is Required
New Home Construction
Most new homes that are not connected to municipal sewer require a perc test before septic permits are approved.
Septic System Replacement
If an existing septic system has failed, updated testing may be required to meet current regulations.
Drainfield Failure
Standing water, repeated backups, or persistent odors may indicate soil absorption problems that require testing.
Property Sale or Development
Some property transfers, splits, or developments require updated perc testing to verify long term system viability.
How Perc Testing Works
1. Site Review and Planning
We review property layout, setbacks, slopes, and potential system locations before testing begins.
2. Test Hole Excavation
Test holes are excavated to required depths based on local health department guidelines.
3. Results and Documentation
Results are recorded and documented for permit submission and system design. If results indicate poor drainage, we explain next steps clearly so there are no surprises.
What Happens If Soil Does Not Pass a Perc Test?
Not all soil passes standard perc testing. Failing results do not always mean a property cannot be used, but they do limit options.
Possible outcomes may include:
- Engineered or alternative septic systems
- Modified drainfield designs
- Drainfield relocation
- Additional testing or review
- In some cases, no septic approval
Perc Testing and Long Term Septic Performance
Skipping or rushing perc testing often leads to system failure later. Proper testing ensures systems are designed for actual soil conditions, not assumptions.
Perc testing helps prevent:
- Chronic septic backups
- Drainfield saturation
- Sewage odors
- Costly emergency repairs
- Premature replacement
Who Needs Perc Testing
Homeowners
If you are replacing a system or dealing with recurring issues, perc testing may be required.
Builders
Perc testing is often required before construction can begin.
Property Owners
Vacant land or undeveloped parcels may require testing before sale or development.
Next Steps After Perc Testing
Once testing is complete, we help you understand the results and what comes next. This may include system design, drainfield repair planning, or coordination with local requirements.
Our goal is to provide clarity so you can make informed decisions.
If you need perc testing or soil evaluation for your property
Contact our team to schedule a site review and testing.
FAQ’S
Perc Test and Percolation Testing
How long does a perc test take?
Most perc tests are completed in one visit, though results may require additional review depending on soil conditions.
Do I need to be present during the test?
No. As long as we have access to the property, testing can be completed without you on site.
Who reviews or submits the results?
We provide documentation needed for permit review. Submission requirements vary by jurisdiction.
What happens if my land fails the test?
Yes, all our technicians are fully licensed and insured, ensuring safe, professional, and reliable garage door services.
Can failed soil ever be approved?
Sometimes. Engineered systems or design changes may allow approval, but this depends on local health department rules.
What happens if my land fails the test?
Sometimes. Engineered systems or design changes may allow approval, but this depends on local health department rules.
How long are perc test results valid?
Validity periods vary by jurisdiction. Some results remain valid for years, while others expire sooner.
Does perc testing guarantee permit approval?
No. It is one requirement, but setbacks, lot size, and system design also affect approval.
Is perc testing required for every property?
No. Properties connected to municipal sewer typically do not require testing.