How to check if your property is contaminated for gardening

Enter your address into a screening tool that reads the public federal record and returns the documented sites within reach — Superfund, underground storage tanks, brownfield, TRI industrial releases, mining, CAFO, nitrate, pesticide history, and PFAS. Growable Ground reads all 9 source types across roughly 1.8M indexed sites and shows which are nearby, what kind, and which direction they travel. It is a screening estimate from documented records and proximity — not a soil measurement — so a nearby record means testing is worth it, not that your soil is contaminated.

A working, well-maintained septic system is generally not a contamination source for a nearby vegetable garden, but keep edible beds off the drain field itself and out of any low spot where effluent could surface after heavy rain. The concern with septic is bacteria and nutrients rather than the heavy metals the federal contamination record tracks, so the practical rules are separation and drainage: give the beds a few feet of clearance, do not dig edible beds into the leach field, and wash produce well. If the system is old or failing, resolve that before growing food directly downhill of it.

Lead paint chips near a pre-1978 house are a common and real source of soil lead, so the right move is a lab test for lead before growing food in that ground. Remove visible chips, then test the soil where you plan to plant — your state Cooperative Extension runs an inexpensive lead panel. If levels come back elevated, raised beds with clean imported soil and a barrier layer let you keep gardening safely, and favoring fruiting crops over leafy greens and roots further lowers exposure. This is soil close to the structure, which the federal site record does not capture — so the lab test, not the map, is the check that matters here.

If your address is near a Superfund site, an old industrial parcel, a busy road, a former orchard, or a known underground storage tank — yes, a lab test is the right next step. Your state Cooperative Extension can run a heavy-metal panel for a modest fee. The federal record narrows down whether and where to test; the lab confirms what is actually in the soil you plan to plant in.

Lead from old paint and historical leaded gasoline near roads; arsenic from pre-1990 orchards and historic pesticide use; petroleum hydrocarbons from underground storage tanks; PFAS from firefighting and industrial use; nitrate from agricultural runoff in well water; and a long list of site-specific contaminants near Superfund or brownfield parcels. The plants you choose, and how you prepare the bed, both matter.

The platform reads 9 federal contamination source types — Superfund, brownfield, underground storage tanks, TRI industrial releases, mining, CAFO, nitrate, pesticide, and PFAS — across roughly 1.8M indexed sites nationwide. For your address, it shows which sites are within reach, what kind of contaminants they involve, and how each source type travels — by road runoff, by wind deposition, or by groundwater flow direction.

A clean federal record is good evidence and not a guarantee. The EPA does not catalog every historical land use, every domestic burn pit, every painted barn. If your soil has been disturbed, your house is pre-1978, or you are growing within a few feet of an old structure or driveway, a lab test for lead and arsenic is inexpensive insurance.

Often yes, with care. Raised beds filled with clean imported soil, lined to prevent root contact with native soil, and located away from the dominant contamination pathway (the road shoulder, the downwind plume) are the standard remedy for low-to-moderate contamination. Leafy greens and root crops accumulate more than fruit-bearing crops, so plant choice matters too. For higher-risk sites, an environmental professional should weigh in before food production.

Different contamination types travel different ways. Road runoff follows the road and the slope. Industrial air emissions travel downwind, so the direction of the prevailing wind matters. Underground plumes travel with groundwater, which follows terrain and aquifer geometry, not the surface road. The same nearby site can be high risk on one side of your parcel and low risk on the other. Patent-pending work on this is what powers the directional view in Growable Ground.

No. For a land purchase, a Phase I Environmental Site Assessment by a licensed consultant is the legal standard, and a Phase II involves actual soil and groundwater sampling. The Growable Ground view is a public-record screening — useful before a Phase I, not a substitute for one.