Where should I test soil for contaminants?
Written by
Benjamin Miller
Reviewed by
Prof. Martin Thorne, Ph.D.To locate trustworthy soil contamination testing services, it's helpful to know the options available. Various labs are set up for different purposes, from individual homeowners to industrial users. Certified labs should be consulted for precise contaminant detection. The test results will depend significantly on the skill of the testing company and the quality of the machinery and test equipment.
University Extension Labs
- Offer affordable testing starting at $50 per sample
- Provide agricultural expertise for pesticide detection
- Deliver educational resources interpreting your results
State Environmental Agencies
- Handle regulatory testing for contaminated sites
- Prioritize public health threats like lead or PFAS
- Offer guidance on mandated cleanup procedures
Private Commercial Labs
- Provide fastest turnaround times (3-5 days)
- Offer comprehensive contaminant packages
- Supply certified reports for legal documentation
Ensure lab certifications for your individual contaminants. Lead testing requires EPA-specified methods, while PFAS testing requires specialized equipment. Mail it to services that are available everywhere, but drop it off locally to ensure your sample remains intact. Verify the credentials with the corresponding state environmental agencies to confirm their accuracy.
Cost varies widely by provider type. The best pricing can be found through University extensions. The state agency offers free testing at qualified sites. However, private labs usually charge a premium for this service when it is rushed. Check price groups before choosing a provider.
Turnaround times have a bearing on decision-making. University laboratories take 2 to 3 weeks during peak times. State agencies prioritize cases of emergency. Private laboratories provide the quickest results for time-sensitive projects. You may assess your level of urgency when picking a service.
Special circumstances need special providers. Sites near airports require PFAS expertise. Former orchards need pesticide specialists. Lead contamination demands certified risk assessors. Match your land history to provider capabilities.
To obtain accurate results, it's essential to prepare samples correctly. Read the lab instructions for soil sample depth and quantity in advance to ensure you have the necessary information. Only use containers that the lab has approved to avoid contamination. Clearly label each sample with the corresponding location information. The lab will analyze the samples and report any detected contaminants (if applicable). Correct sample preparation leads to reliable detection of contaminants.
Read the full article: 5 Critical Insights into Soil Contamination Testing
