--- title: "PFAS Testing for Property Owners: A Sampling Guide" description: "Learn when a property needs PFAS testing, how water and soil sampling works, which EPA lab methods apply and how to read results in parts per trillion." url: https://aes.multisites.ai/guides/pfas-testing-for-property-owners publisher: Advanced Environmental Services phone: +1-314-865-2662 quote: https://aes.multisites.ai/contact --- Guide: 8 min read, updated October 30, 2026 # PFAS testing for property owners: when to test, how sampling works and what results mean Test for PFAS if your property sits near an airport, military base, landfill or industrial site, used firefighting foam, or draws from a private well. A site assessment picks sample points, trained staff collect clean samples, and an accredited lab reports results in parts per trillion. AES says most results arrive in two to four weeks. [Request a Quote](https://aes.multisites.ai/contact)[(314) 865-2662](tel:+1-314-865-2662) ![Aircraft hangar with a yellow fire truck and equipment during an AES PFAS project](https://aes.multisites.ai/_astro/pfas-2025-06-24-11.09.00.CKLsY786_1Qvvzs.webp) ![Steel roof structure inside a large aircraft hangar on an AES PFAS job](https://aes.multisites.ai/_astro/pfas-hangar1-20250623_105358.BLl5LH1X_Z2wtFbb.webp) ![Large warehouse floor with AES equipment in the distance](https://aes.multisites.ai/_astro/pfas-warehouse-2025-12-03-11.52.27.BVKPsHAu_sbKVc.webp) ## Who should test AES strongly recommends testing near airports, military bases, landfills, industrial facilities, or where firefighting foams were used. ## Private wells are on you EPA says it does not regulate or provide recommended standards for private wells, so start with your state agency and a certified lab. ## Use the right method EPA Methods 533 and 537.1 measure 29 PFAS in drinking water. Soil and groundwater need other methods. ## Results arrive in weeks AES says most PFAS testing results are available within two to four weeks, depending on sample count and lab schedules. ## Does my property need PFAS testing? Not every property does. AES says testing is strongly recommended for sites near airports, military bases, landfills and industrial facilities, or where firefighting foams have been used. A private well, a property sale or a lender’s request can also be reasons. PFAS are a group of manmade chemicals. Missouri DNR says they repel both water and oil and have been used since the 1940s in products such as non-stick cookware, carpet, clothing, furniture fabrics, cleaning products and some firefighting foams. DNR also says many PFAS break down very slowly and can build up in people, animals and the environment. Our [PFAS](https://aes.multisites.ai/glossary/pfas) glossary entry gives a short definition. Use this table to decide whether to test and what to test first. Your situation Test first Why Home on public water Read your utility’s results The utility must monitor under EPA’s rule, so start with its reports Home on a private well Well water EPA does not regulate private wells, so the owner tests Near an airport, base, landfill or plant Water, then soil if there is a source on your land AES recommends testing near these sites Firefighting foam used on site Soil and groundwater AES lists foam use as a reason to test Buying or selling an industrial property Site assessment, then sampling A history review shows where to sample No known source and public water Often no test needed Utility results may be enough ## Where do I start: public water, a private well or my site? Start with the water source. If you use a public system, ask the utility for its PFAS results. Missouri DNR’s PFAS Viewer Tool maps voluntary sampling of public systems. If you have a private well, contact your state agency and a certified lab. Missouri DNR says it has run PFAS monitoring projects for public supplies since 2013. Its PFAS Viewer Tool identifies where voluntary sampling took place in public drinking water systems. Look up your area before paying for a test. EPA gives steps for private wells. It says to contact your state environmental or health agency for advice and for a list of state-certified labs that use EPA-developed methods. It also says individuals can contact their state laboratory certification program to learn whether the state has certified labs for PFAS analysis. For land, soil or groundwater, the question changes. You are not testing what comes out of a tap. You are asking whether a release happened on or near your property and where it went. That takes a site assessment before any sampling, described next. ## What does a PFAS site assessment involve? A site assessment reviews site history, known PFAS use and likely pathways before anyone collects a sample. AES describes it as the first step, used to find potential sources, the extent of contamination and the right sampling points. See AES’s [PFAS assessment](https://aes.multisites.ai/pfas-assessment) page. A good assessment answers four questions in writing: 1. **What happened here?** Past owners, industrial processes, firefighting training or waste handling. 2. **Which PFAS use is known?** Foams, coatings, plating or manufacturing. 3. **Where could PFAS have moved?** Groundwater flow, runoff, drainage and neighboring sites. 4. **Where should samples come from?** Wells, soil borings, surface water or sediment. PFAS move easily in water. AES says they are persistent and mobile in the environment, which is why proper sampling matters before you design a cleanup. Skipping the assessment can mean paying to sample the wrong spots. ## How are PFAS samples collected? Trained staff collect samples with equipment that contains no fluorinated plastics, then ship them to an accredited lab under chain of custody. PFAS are common in everyday materials, so careless sampling can add PFAS to a clean sample. AES describes its practice on its [PFAS sampling](https://aes.multisites.ai/pfas-sampling) page. Its technicians use specialized non-fluorinated equipment to prevent cross-contamination. Its kits are stainless steel, polypropylene or HDPE, never Teflon or PTFE. It uses pre-cleaned containers and field blanks, plus low-flow sampling for groundwater. AES says its technicians avoid PFAS-containing materials from gloves and bottles to clothing and field gear, and keep documentation and chain-of-custody records. EPA names the standard drinking water methods. The table adds AES’s published methods for other media. Sample type Method Source Drinking water EPA Methods 533 and 537.1 (together measure 29 PFAS) EPA Wastewater, soil and groundwater EPA Draft Method 1633 AES, on its sampling page Ask the lab or consultant which method applies to your sample, which compounds it measures and what reporting limit it can reach. A lab that cannot answer is not ready to test PFAS. ## How do I read the results? Results come in parts per trillion, or ppt, and list each PFAS compound with a detection limit. Compare PFOA and PFOS to EPA’s drinking water limit of 4.0 ppt each. That limit covers public water systems. EPA sets no recommended standard for private wells. The glossary defines [parts per trillion](https://aes.multisites.ai/glossary/parts-per-trillion-ppt) and [MCL](https://aes.multisites.ai/glossary/mcl-maximum-contaminant-level), the maximum contaminant level. EPA’s 2024 drinking water rule set enforceable levels for six PFAS. EPA’s proposed 2026 extension keeps the PFOA and PFOS levels at 4.0 ppt each. Our guide to the [PFAS drinking water rule](https://aes.multisites.ai/guides/pfas-drinking-water-rule-explained) gives the current status. What you see on the report What it means ND or “not detected” Below the lab’s reporting limit, not proof of zero A number in ppt or ng/L Concentration of one PFAS in that sample Detection above 4.0 ppt for PFOA or PFOS Above the federal drinking water limit for public systems Several PFAS detected together Some PFAS rules treat mixtures together, so list them all Field blank with a detection The sample may be contaminated by handling, so ask for a retest A result is a snapshot of one place and day. Ask your consultant to explain the numbers in plain words, to say what they compare against and to recommend next steps. Our post on [how to read a PFAS lab report](https://aes.multisites.ai/blog/how-to-read-a-pfas-lab-report) goes line by line. ## How long does PFAS testing take, and what does it cost? AES says most testing results are available within two to four weeks, but turnaround varies with the number of samples and laboratory schedules. AES does not publish a PFAS testing price. The cost depends on the number of samples, the media and the compounds measured. Budget for more than the lab fee. A full project includes the site review, field work, shipping, lab analysis and the written interpretation. Ask for a quote that lists each part, so you can compare providers on equal terms. Plan the timeline backward from your deadline. If a sale or permit depends on results, order the work early, because the lab queue is outside anyone’s control. ## What happens if PFAS are found? You decide next steps with your consultant and, where rules apply, your state agency. AES says that if PFAS are found, it helps you understand the results and discuss next steps, which may include more assessment or remediation. For water, treatment may follow. The common options for water are covered on AES’s [PFAS treatment technologies](https://aes.multisites.ai/pfas-treatment-technologies) page. AES’s water treatment page names granular activated carbon, ion exchange and reverse osmosis, and explains why testing data picks the right one. Our glossary covers the technology terms. If PFAS are in your drinking water and you are concerned, EPA’s proposed-rule Q&A says to contact your water utility for its levels and what it is doing to reduce them. If you worry about health, talk to your doctor. ## How does PFAS testing differ for a business or industrial site? Commercial and industrial sites test more media and need defensible records. AES says it serves municipalities, industrial facilities and private property owners, and that its work includes site assessments, sampling and laboratory analysis, then data interpretation and reporting. AES names the usual pathways PFAS take into water on its drinking water page. Use them to decide what to sample: Pathway Where it shows up What to sample Industrial manufacturing runoff Facilities using PFAS in coatings, plating or chemical production Process areas, discharge points, groundwater Wastewater treatment discharge Plants handling PFAS-laden biosolids or effluent Effluent, biosolids, receiving water Firefighting foam (AFFF) Airports, military bases and training facilities Soil, groundwater, drainage Landfill leachate Landfills holding PFAS-based waste Leachate, groundwater Sites with these histories may find PFAS at the source and downstream. AES says PFAS are soluble and mobile, so they can spread over long distances underground. AES also publishes separate pages for airports, landfills and schools if one fits your property. ## What questions should I ask a PFAS testing provider? Ask about the method, the lab, the sampling controls and the report. A provider who answers clearly is easier to trust. These questions separate careful work from careless work. Question A good answer Which EPA method will you use for my sample? Names a method that fits the media, such as 533 or 537.1 for drinking water Which lab runs the analysis? An accredited lab with PFAS experience; for wells, one your state recognizes How do you prevent cross-contamination? Non-fluorinated gear, field blanks, pre-cleaned containers Is chain of custody documented? Yes, with forms for every sample What will the report include? Results in ppt, detection limits, a comparison with limits and next steps What is the timeline? A date range, with lab time included Avoid sampling alone if the result will support a sale, a permit or a legal claim. Poor sampling can invalidate the data. ## What mistakes should property owners avoid? Most testing problems come from skipped planning, not from the lab. Avoid these five errors. 1. **Sampling before you know the source.** A site review shows where to sample. Without it, you may test the wrong spots and pay twice. 2. **Using the wrong bottle or gear.** PFAS appear in common materials. Use the lab’s kit or a trained sampler. 3. **Reading one number as the whole story.** One result is a snapshot of one place and day. Ask what it compares against. 4. **Ignoring the detection limit.** A “not detected” result only means below the lab’s reporting limit. 5. **Waiting until a deadline.** Lab time and field work take weeks. AES says most results arrive within two to four weeks, so order early. Keep every lab report, chain-of-custody form and invoice. Those records protect you if a buyer, lender or regulator asks later. ## Next step Ready to scope a test? Call AES at (314) 865-2662 or use the quote form at [/contact](https://aes.multisites.ai/contact). AES provides PFAS sampling and analysis for property owners across Missouri. Start with the [PFAS testing](https://aes.multisites.ai/pfas-testing) page for the full service. ## Frequently asked questions ### Does my property need PFAS testing? Not necessarily. AES says testing is strongly recommended for sites near airports, military bases, landfills and industrial facilities, or where firefighting foams have been used. A private well or a planned property sale can also be reasons. Most homes on public water can start with the utility's own results. ### How do I find a lab to test my well for PFAS? EPA says homeowners should contact their state laboratory certification program to learn whether the state has certified labs for PFAS analysis. EPA also says to contact your state environmental or health agency for advice and a list of state-certified labs using EPA-developed methods. ### What EPA methods test drinking water for PFAS? EPA says that using Methods 533 and 537.1, both government and private laboratories can measure 29 PFAS in drinking water. Ask any lab which method it uses for your sample. ### What do PFAS results in ppt mean? PPT means parts per trillion, the same as nanograms per liter. EPA's drinking water limits for PFOA and PFOS are 4.0 ppt each, and they apply to public water systems. A private well result has no federal limit, so compare it with the public limits and your state agency's advice. ### How long does PFAS testing take? AES says turnaround varies with the number of samples and lab schedules, but most testing results are available within two to four weeks. Plan for field work first, then lab analysis, then a written report that explains the numbers. ### Can I collect PFAS samples myself? It is risky. PFAS appear in many common materials, so ordinary gloves, bottles or clothing can contaminate a sample. AES says its technicians use specialized non-fluorinated equipment and follow strict protocols. Use a lab kit or a trained sampler, and follow the lab's directions exactly. ## Terms on this page - [Granular activated carbon (GAC)](https://aes.multisites.ai/glossary/granular-activated-carbon-gac) - [MCL (maximum contaminant level)](https://aes.multisites.ai/glossary/mcl-maximum-contaminant-level) - [Parts per trillion (ppt)](https://aes.multisites.ai/glossary/parts-per-trillion-ppt) - [Ion exchange](https://aes.multisites.ai/glossary/ion-exchange) - [PFAS](https://aes.multisites.ai/glossary/pfas) - [PFOA](https://aes.multisites.ai/glossary/pfoa) - [PFOS](https://aes.multisites.ai/glossary/pfos) ## Sources 1. [US EPA: PFAS Drinking Water Laboratory Methods](https://www.epa.gov/pfas/epa-pfas-drinking-water-laboratory-methods) 2. [US EPA: PFAS Drinking Water Laboratory Methods (finding a lab)](https://www.epa.gov/pfas/epa-pfas-drinking-water-laboratory-methods) 3. [US EPA: PFAS in Private Wells](https://www.epa.gov/cleanups/pfas-private-wells) 4. [US EPA: Proposed PFOA and PFOS Compliance Extension Rule](https://www.epa.gov/sdwa/proposed-pfoa-and-pfos-compliance-extension-rule) 5. [US EPA: Final PFAS National Primary Drinking Water Regulation](https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas) 6. [Missouri DNR: PFAS](https://dnr.mo.gov/contaminant-spotlight/perfluoroalkyl-polyfluoroalkyl-substances-pfas) 7. [Advanced Environmental Services: PFAS Testing and Analysis](https://www.aes-stl.com/pfas-testing/) 8. [Advanced Environmental Services: PFAS Testing and Analysis (who should test)](https://www.aes-stl.com/pfas-testing/) Written by Advanced Environmental Services and checked against the sources above on October 30, 2026. Rules change, so check the linked page before you act. ## Keep reading - [The EPA PFAS drinking water rule explained: limits, deadlines and what is proposedEPA's 2024 rule sets legally enforceable limits for six PFAS in public drinking water, including 4.0 parts per trillion each for PFOA and PFOS. Compliance is due in 2029. As of October 30, 2026, EPA has proposed, but not finalized, an optional extension to 2031 and the removal of four other limits.](https://aes.multisites.ai/guides/pfas-drinking-water-rule-explained) - [How to read a PFAS lab report: ppt, PFOA, PFOS and limitsA PFAS lab report lists each compound it tested for, such as PFOA and PFOS, with a result in parts per trillion (ppt), also written ng/L. Compare PFOA and PFOS to EPA's 4.0 ppt drinking water limits. EPA decides compliance by a running annual average, so one result alone does not prove a violation.](https://aes.multisites.ai/blog/how-to-read-a-pfas-lab-report) - [Asbestos in older St. Louis homes: where it hides and what to doAsbestos can hide in floor tile, floor adhesive, siding, roof shingles, textured walls, pipe wrap, furnace parts and attic insulation. About 87% of St. Louis city housing units and 68% of St. Louis County units were built before 1980. The only way to know is a lab test from a certified inspector.](https://aes.multisites.ai/guides/asbestos-in-older-st-louis-homes) - [Lead paint in pre-1978 homes: when to test, renovate safely or abateAny home built before 1978 may have lead-based paint. In Missouri, an estimated 60% of homes built 1960 to 1978 do, rising to 90% before 1949. Intact paint is a lower risk. Peeling paint and renovation dust are the problem. Missouri requires licensed lead professionals for abatement and for paint chip sampling.](https://aes.multisites.ai/guides/lead-paint-in-pre-1978-homes) - [Mold after water damage: how to inspect, remediate and verify the fixDry water-damaged areas and items within 24 to 48 hours, because mold needs moisture to grow. If mold already shows, or covers more than 10 square feet, EPA says to treat it as a larger job. Find the water source, contain the area, remove damaged material, dry everything, then confirm the moisture is gone.](https://aes.multisites.ai/guides/mold-after-water-damage) - [EPA keeps PFOA and PFOS limits, proposes a 2031 deadline optionAs of October 30, 2026, EPA's page describes a proposed rule, not a final one. It would keep the PFOA and PFOS limits at 4.0 parts per trillion each and let water systems request two more years, to 2031, to comply. EPA announced it May 18, 2026. The comment period closed July 20, 2026.](https://aes.multisites.ai/blog/epa-pfas-drinking-water-rule-2031-proposal) ## Request your custom environmental remediation estimate Contact us for a free environmental remediation or restoration estimate and a personalized solution to your problems. [Request a Quote](https://aes.multisites.ai/contact)[(314) 865-2662](tel:+1-314-865-2662)