THE 10 BEST Soil Testing Services in PORTLAND, OR
| Business Name | Key Services | Best For | Address | Hours | PS Rating |
|---|---|---|---|---|---|
| OSU Soil Health Laboratory | Nutrient analysis, pH testing, soil health assessment | Research-based agricultural testing | 3017 Agriculture and Life Sciences Building, Corvallis, OR 97331 | Mon-Fri 9AM-3PM | 4.7/5 |
| A&L Western Agricultural Laboratories | Complete soil analysis, organic recommendations, micronutrient testing | Comprehensive farm and garden testing | 10220 SW Nimbus Ave, Bldg K-9, Portland, OR 97223 | Mon-Fri 8AM-5PM | 4.5/5 |
| Environmental Works | Contamination testing, soil sampling, environmental analysis | Property transactions and safety assessments | Greater Portland Area Service | Same-day available | 4.8/5 |
| Alpha Environmental | UST testing, contamination detection, tank location services | Oil tank and property safety testing | Portland Metro Area Service | Mon-Fri 8AM-5PM | 4.6/5 |
| Columbia Laboratories | Heavy metals, pesticides, water quality, comprehensive testing | Commercial and industrial testing | 12423 NE Whitaker Way, Portland, OR 97230 | Mon-Fri 8AM-5PM | 4.4/5 |
| Intertek PSI Portland | Geotechnical testing, construction materials, site assessments | Construction and development projects | 6032 N. Cutter Circle Suite 480, Portland, OR 97217 | Mon-Fri 8AM-5PM | 4.3/5 |
| Terracon Consultants | Environmental consulting, geotechnical services, materials testing | Large-scale commercial projects | Portland Metro Area Service | Mon-Fri 8AM-5PM | 4.5/5 |
| Carlson Testing Inc. | Geotechnical engineering, materials testing, construction inspection | Construction and engineering projects | 8430 SW Hunziker St, Tigard, OR 97223 | Mon-Fri 7AM-5PM | 4.6/5 |
| Simply Soil Testing | Home garden testing, organic recommendations, basic analysis | Residential gardeners and homeowners | Burlington, WA (serves Portland) | Mail-in service | 4.4/5 |
| OMIC USA Inc. | Agricultural analysis, soil and water testing, lab services | Agricultural producers | Portland, OR 97230 | Mon-Fri 8AM-5PM | 4.2/5 |
#1. OSU Soil Health Laboratory – Best for Research-Based Agricultural Testing
Key Highlights:
- Accredited by NAPT-PAP for soil testing performance standards
- Provides comprehensive nutrient analysis with expert interpretation
- Offers research-backed recommendations from Oregon State University
The OSU Soil Health Laboratory stands as Portland’s most trusted academic soil testing facility. Located in Corvallis but serving the entire Portland metro area, this laboratory brings decades of research expertise to every soil sample. They use cutting-edge testing methods developed through years of agricultural research.
Their testing packages include everything from basic pH and nutrient levels to advanced soil health indicators. The lab examines organic matter content, cation exchange capacity, and micronutrient availability. Results come with detailed recommendations tailored to your specific crops or plants.
What makes OSU stand out is their educational approach to soil testing. They don’t just give you numbers. They help you understand what those numbers mean for your soil health. Their staff includes soil scientists who can answer questions about your specific situation.
Turnaround time is usually 4 to 5 weeks for standard testing. You can drop off samples at their submission box outside Room 3079 during weekday hours. They also accept mail-in samples from across Oregon.
#2. A&L Western Agricultural Laboratories – Best for Comprehensive Farm and Garden Testing
Key Highlights:
- Complete S3C analysis package with all plant nutrients for affordable pricing
- Offers both conventional and organic fertilizer recommendations
- Local Portland location makes drop-off convenient
A&L Western Agricultural Laboratories has been serving Portland’s agricultural community for decades. Their Portland location on SW Nimbus Avenue makes them one of the most accessible testing labs in the area. They specialize in providing detailed analysis that helps farmers and gardeners make smart decisions.
Their complete analysis package includes pH, all major and minor nutrients, organic matter, and soil texture information. The test results come with fertilizer recommendations based on the specific crops you plan to grow. They can customize advice for vegetables, fruits, lawns, or specialty crops.
The lab offers different testing packages to fit various budgets and needs. Their basic test starts at an affordable price point for home gardeners. Commercial growers can access more advanced testing options including micronutrient analysis and salinity testing.
Response time is quick, usually within 2 weeks for standard testing. You can bring samples directly to their Portland facility or mail them in. Their staff is friendly and happy to answer questions about collecting samples correctly.
#3. Environmental Works – Best for Property Transactions and Safety Assessments
Key Highlights:
- Offers free estimates and same-day service when possible
- Specializes in heating oil tank contamination testing
- Provides instant results communication via text or call
Environmental Works focuses on environmental soil sampling for property safety. They serve Portland, Beaverton, Tigard, and Vancouver with fast, reliable testing services. Their expertise covers everything from residential heating oil tanks to commercial property assessments.
When you’re buying or selling a home, soil contamination testing is often required. Environmental Works makes this process smooth and stress-free. They test for petroleum hydrocarbons, chemicals, and other contaminants that could affect property value or safety.
Their team uses advanced sampling methods including drill rigs and specialized equipment. They can detect contamination at various depths and locations around your property. If they find problems, they also offer remediation services to clean up contaminated soil.
What customers love most is their communication. They call or text with results immediately, which is super helpful during real estate transactions. Their customer service team is known for being friendly, professional, and detail-oriented throughout every project.
#4. Alpha Environmental – Best for Oil Tank and Property Safety Testing
Key Highlights:
- Over two decades of experience serving the Portland area
- Uses advanced technology for tank location and soil assessment
- Licensed, bonded, and insured with fast response times
Alpha Environmental specializes in underground storage tank testing and soil contamination analysis. They’ve been doing this work in Portland for more than 20 years. Their expertise helps homeowners and businesses understand whether old oil tanks have leaked into surrounding soil.
The company follows strict DEQ regulations when testing soil around heating oil tanks. They know exactly where to take samples and how deep to dig. Their testing can detect even small amounts of petroleum contamination that might not be visible.
Alpha Environmental provides thorough assessments that include tank location, condition evaluation, and soil testing. If contamination is found, they offer cleanup and remediation services to fix the problem. They handle all required reporting to state environmental agencies.
Customer reviews consistently praise their helpful staff and quick turnaround times. They typically respond within one business day to schedule consultations. Many customers appreciate their clear explanations of testing procedures and results.
#5. Columbia Laboratories – Best for Commercial and Industrial Testing
Key Highlights:
- ISO 17025:2017 accredited for quality assurance
- USDA permits allow testing of international samples
- Comprehensive testing includes heavy metals, pesticides, and microbiology
Columbia Laboratories serves a wide range of clients from individual homeowners to Fortune 500 companies. Located in Portland, they’ve been providing analytical testing services since 1996. Their facility can handle everything from simple soil tests to complex contamination analysis.
The lab offers testing for heavy metals like lead, cadmium, mercury, and arsenic. This is important for urban gardens where soil might be contaminated from old paint or industrial activities. They also test for pesticide residues and other agricultural chemicals.
As part of the Tentamus Group, Columbia has access to a global network of laboratories. This means they can handle unusual or specialized testing requests that smaller labs can’t manage. Their accreditation ensures results are legally defensible and meet industry standards.
Their testing services extend beyond soil to include water quality, plant tissue analysis, and environmental samples. Turnaround times vary based on the complexity of testing. They provide detailed reports that are easy to understand even for non-scientists.
#6. Intertek PSI Portland – Best for Construction and Development Projects
Key Highlights:
- Geotechnical engineering expertise for major infrastructure projects
- Approved by multiple regulatory agencies including ODOT and USACE
- One of 72 PSI offices providing consistent nationwide standards
Intertek PSI Portland serves Multnomah County and surrounding areas with professional engineering and testing services. They focus on construction materials testing and geotechnical assessments for development projects. Their work ensures buildings and infrastructure meet all safety codes.
The company conducts soil testing to understand subsurface conditions before construction begins. This includes testing soil strength, composition, and load-bearing capacity. Their geotechnical engineers analyze results to provide foundation design recommendations.
PSI Portland has worked on many iconic Portland projects including work for major manufacturers and Portland International Airport. Their team includes licensed engineers, geologists, and certified technicians. They understand local soil conditions and building requirements.
Their services cover the entire construction lifecycle from initial site assessment through final inspection. They can perform field testing on-site during construction. Laboratory testing is available for more detailed analysis of soil properties.
#7. Terracon Consultants – Best for Large-Scale Commercial Projects
Key Highlights:
- Employee-owned firm with over 50 Portland area professionals
- Serving the Pacific Northwest since 1998
- Comprehensive services including environmental, geotechnical, and materials testing
Terracon brings big company resources with local knowledge to Portland soil testing. Their Portland office employs engineers, geologists, scientists, and technicians ready to tackle complex projects. They provide consulting services throughout Oregon and beyond.
The company offers complete environmental site assessments including soil sampling and analysis. They can identify potential contamination from current or historic uses. Their geotechnical services help determine the best foundation designs for new construction.
Terracon’s materials testing ensures construction materials meet specifications and quality standards. They test soil compaction, aggregate properties, and other factors critical to building safety. Their work helps prevent costly construction problems down the road.
What sets Terracon apart is their commitment to safety and quality. They follow strict protocols for sampling and testing. Their reports are thorough and include clear recommendations based on test results.
#8. Carlson Testing Inc. – Best for Construction and Engineering Projects
Key Highlights:
- Established in 1976 with 49 years of experience
- Largest commercial construction materials laboratory in Oregon
- A2LA accredited laboratories in multiple Oregon locations
Carlson Testing operates out of Tigard with additional offices throughout Oregon. They’re known for having the most comprehensive soil testing laboratory in the state. Their services range from simple residential projects to major infrastructure developments.
The company provides geotechnical engineering services including soil borings, foundation recommendations, and slope stability analysis. Their laboratory can perform advanced tests like consolidation testing and direct shear analysis. These tests help engineers design safe, stable structures.
Carlson’s field technicians conduct on-site testing during construction to ensure quality control. They test soil compaction, moisture content, and other properties as work progresses. This helps catch problems early before they become expensive issues.
Their staff includes registered professional engineers and geologists who understand Oregon’s unique soil conditions. They’re certified by multiple agencies including the Oregon Department of Transportation. Customers appreciate their responsive communication and practical recommendations.
#9. Simply Soil Testing – Best for Residential Gardeners and Homeowners
Key Highlights:
- Affordable testing packages starting at budget-friendly prices
- Specializes in home garden and lawn testing
- Provides both organic and conventional fertilizer recommendations
Simply Soil Testing focuses specifically on residential gardening needs. While based in Burlington, Washington, they serve Portland gardeners through convenient mail-in testing. Their approach is perfect for homeowners who want to improve their vegetable gardens or lawns.
The company offers several testing packages ranging from basic to comprehensive. Their full testing package includes pH, all plant nutrients, organic matter, and soluble salts for a reasonable price. Results come with specific recommendations for the plants you want to grow.
What gardeners love is the personalized advice. You tell them what you’re planting, and they tailor fertilizer recommendations to those specific crops. They offer both organic and conventional amendment options so you can choose what fits your gardening philosophy.
Their testing helps you avoid wasting money on unnecessary fertilizers. By knowing exactly what your soil needs, you can add only the nutrients that are missing. This saves money and is better for the environment.
#10. OMIC USA Inc. – Best for Agricultural Producers
Key Highlights:
- Specialized agricultural soil and water analysis
- Comprehensive lab services for commercial growers
- Located in Portland for easy access
OMIC USA provides agricultural laboratory services focused on helping commercial growers maximize crop yields. Their Portland location makes them accessible for farmers throughout the Willamette Valley. They understand the unique challenges of Oregon agriculture.
The lab offers detailed soil nutrient analysis that helps farmers make fertilizer decisions. They test for all major and minor nutrients plus soil pH and salinity levels. Their recommendations help optimize soil conditions for specific crops.
OMIC also provides water quality testing which is important for irrigation management. Poor water quality can affect crop health and soil chemistry over time. Their analysis helps identify potential problems before they damage crops.
Their experience with agricultural production means they understand crop nutrient requirements. They can interpret test results in the context of commercial farming operations. This practical knowledge helps growers make cost-effective management decisions.
How Much Does Soil Testing Cost in Portland?
Soil testing prices in Portland vary widely based on what you need tested. Basic pH testing can be free through Master Gardener programs or cost around $15 to $25 at commercial labs. Complete nutrient analysis packages typically range from $35 to $70 for home gardeners.
More comprehensive testing for heavy metals, pesticides, or contaminants costs between $100 and $300 per sample. Environmental testing for property transactions often runs $300 to $800 depending on how many samples are needed. Commercial agricultural testing packages can cost more but provide detailed analysis for large acreage.
Most labs offer different testing levels so you can choose what fits your budget. Basic tests cover pH and major nutrients like nitrogen, phosphorus, and potassium. Advanced packages add micronutrients, organic matter, and soil texture analysis.
Consider what you really need before ordering expensive tests. Home gardeners usually don’t need the same detailed analysis as commercial farmers. If you’re just trying to improve your vegetable garden, a mid-level package is probably perfect.
How Often Should I Test My Soil in Portland?
Most Portland gardeners should test their soil every 3 to 5 years. This timeframe lets you track how your soil is changing over time. If you’re adding compost and amendments regularly, testing helps you see if your efforts are working.
New gardens or lawns should be tested before you start planting. This baseline test tells you what amendments to add from the beginning. It’s much easier to fix soil problems before plants are in the ground.
Some situations require more frequent testing. If you’re growing intensive crops like vegetables or have had plant health problems, test every 2 to 3 years. Commercial growers often test annually to fine-tune fertilizer applications.
Portland’s rainy climate causes nutrients to leach from soil over time. Regular testing helps you know when to add lime to adjust pH or replace lost nutrients. This keeps your plants healthy and saves money by avoiding unnecessary fertilizer applications.
What Soil Problems Are Common in Portland?
Portland soils are typically acidic due to heavy rainfall. Most areas have pH levels between 5.0 and 6.0, which is too low for many garden plants. Adding lime is often necessary to raise pH to the ideal range of 6.5 to 7.0.
Clay soil is extremely common in Portland, especially in areas with Jory or Willakenzie soil types. These heavy soils drain poorly and can suffocate plant roots. Adding organic matter like compost helps improve drainage and soil structure over time.
Urban soils may contain lead contamination from old paint or past industrial uses. This is especially a concern near old houses or former industrial sites. Testing for heavy metals is smart if you’re planting edible gardens in established neighborhoods.
Some Portland soils lack sufficient organic matter and have poor nutrient levels. Regular additions of compost help build soil fertility naturally. Testing shows you which specific nutrients need supplementing for the best plant growth.