Landfills & Waste Sites.

§ I · The surface

A municipal solid waste landfill — MSW in regulatory shorthand — is the engineered terminus for household and commercial garbage. The modern version is a lined, capped, methodically constructed earthwork: a base layer of compacted clay and synthetic membrane to keep liquids from reaching groundwater, a sequence of waste cells filled in stages, a cap of clay and soil sealed over the final lift to keep precipitation out, and a perimeter network of gas-collection wells and groundwater monitoring points. The Bordeaux Landfill, which received Nashville's household waste from 1973 to 1994, is one of these. Southern Services, the construction-and-demolition (C&D) landfill that has handled most of the city's drywall, concrete, and post-storm rubble for more than thirty years, is a related but regulatorily distinct category — C&D landfills accept inert and semi-inert construction debris rather than household waste, and are subject to different gas-emission and monitoring requirements.

What happens inside a closed landfill is not nothing. Organic material — food scraps, paper, yard waste, lumber, cardboard, anything containing biomass — continues to decompose for decades after the final cap is placed. The decomposition is anaerobic, meaning it proceeds in the absence of oxygen, and its principal byproduct is landfill gas (LFG): approximately fifty percent methane and fifty percent carbon dioxide by volume, plus trace concentrations of nearly thirty organic hazardous air pollutants including benzene, toluene, ethylbenzene, and vinyl chloride. Methane is the most consequential of these from a climate standpoint — at least twenty-eight times more potent than CO₂ as a greenhouse gas over a hundred-year horizon — and the most consequential of these from a regional smog standpoint as well, since LFG components react with sunlight to form ground-level ozone. MSW landfills are the third-largest human-caused source of methane emissions in the United States.

EPA tracks active MSW landfills through the Landfill Methane Outreach Program (LMOP) and through the Greenhouse Gas Reporting Program (GHGRP), which requires landfills with annual methane generation above 25,000 metric tons of CO₂-equivalent to report their emissions. Closed landfills remain on these registries for as long as they continue to off-gas measurably — which, for a site like Bordeaux, means decades after the final waste was deposited.

§ II · The hidden layer

The fact worth naming directly is that these two landfills — the closed one and the operating one — are located in the same predominantly Black neighborhood, less than a mile apart, on land where Metropolitan Nashville Government and its predecessors have historically also sited a jail, an animal control facility, a water treatment plant, a county hospital, and a potter's field. The geography is documented in city records, in two decades of local journalism, and in the official testimony of state legislators, Metro Council members, and community advocates. Davidson County Councilmember Jonathan Hall, who represents District 1, grew up between the two sites. State Senator Brenda Gilmore has been advocating against further landfill expansion in Bordeaux for twenty years.

This page is a hazard explainer, not an advocacy piece, and the recommendations in §IV are the same as they would be for any landfill chapter — based on distance, status, gas-collection infrastructure, and prevailing wind. But a hazard chapter that did not state the geographic fact above would be telling readers less than the public record knows. Parcelscope's underlying data — the EPA LMOP registry, the TDEC permit records, the Metro Public Works post-closure file — surfaces these sites as numbers. The community that has lived with them for two generations knows them as something else.

§ III · What the records show

A Parcelscope report's landfill category surfaces the closest LMOP-registered MSW landfill within three miles of the subject address, with status and distance. The three-mile radius reflects the distance at which landfill-gas emissions and odor episodes can be reasonably attributed to a specific source; beyond it, attribution becomes unreliable. C&D landfills like Southern Services are not currently in LMOP scope — LMOP tracks municipal solid waste landfills specifically, because those are the methane-generating category — but they are visible through state TDEC permits and Metro Public Works records.

Three pieces of context worth knowing when reading these records:

First, "closed" does not mean "inactive." A municipal solid waste landfill that received its last load thirty years ago is still generating methane today. The decomposition rate slows over time — peak gas generation typically occurs five to fifteen years after waste placement and declines gradually thereafter — but measurable emissions persist for decades. The Bordeaux Landfill, closed in 1996, is still in post-closure monitoring for exactly this reason. Closure changes the regulatory regime; it does not switch off the underlying biology.

Second, gas-collection infrastructure matters. About two-thirds of GHGRP-reporting landfills nationally have an active landfill-gas collection system; these systems typically capture sixty to ninety percent of methane generated and either flare it or convert it to electricity or pipeline-quality natural gas. The remaining one-third of landfills, plus the uncollected fraction at sites that do have collection systems, contributes to ambient air emissions. Whether a specific landfill near your address has active gas collection — and how effective it is — substantially changes the exposure profile.

Third, the regulatory category matters. MSW landfills are regulated under Subtitle D of the Resource Conservation and Recovery Act with substantial liner, cap, monitoring, and post-closure requirements. C&D landfills are regulated under a separate, generally less stringent set of rules because their waste stream is assumed to be inert. In practice, the C&D waste stream often contains drywall (a sulfur source that can off-gas hydrogen sulfide under wet anaerobic conditions), painted lumber, treated wood, and small fractions of household waste that didn't get separated out at the curb. The regulatory category captures what the law assumes is in the pile. What is actually in the pile varies.

§ IV · The bottom line

The presence of an active MSW landfill within one mile of a Davidson County address is the kind of finding that warrants direct investigation before a real-estate commitment, particularly with attention to which direction the prevailing wind carries gas and odor emissions. For Davidson County, this question is largely confined to addresses in northwest Nashville near the Bordeaux site cluster; the county does not operate an active MSW landfill within its boundaries today, and most of Nashville's household waste travels to Middle Point Landfill in Rutherford County. The presence of an active C&D landfill within a mile — primarily relevant to Bordeaux-adjacent addresses near Southern Services — is a comparable concern, though the regulatory framework and emissions profile are different.

The presence of a closed, post-closure-monitored MSW landfill within a mile or two — the Bordeaux situation for a substantial portion of northwest Nashville — is a longer-tail consideration. Methane emissions from a properly capped closed landfill are typically captured by gas collection where it exists, flared or used for energy, and otherwise attenuate over decades. Groundwater monitoring around well-managed closed landfills typically shows no off-site migration. The principal residual exposures associated with closed landfills are odor episodes during weather inversions, occasional methane vent stack visibility, and the property-value and quality-of-life effects of living adjacent to a former landfill — effects that, in Bordeaux, have been documented and discussed in city council testimony for decades.

For an owner or buyer who wants to read landfill records themselves: EPA's Landfill Methane Outreach Program maintains a public registry of MSW landfills at epa.gov/lmop, including operational status, gas-collection details, and emissions data for reporting facilities. TDEC's Division of Solid Waste Management permits and inspects Tennessee landfills, including C&D sites, through publicly searchable databases. Metro Public Works maintains post-closure documentation for the Bordeaux site, including the wildlife-habitat conversion records.

For everyone else, this is one of the thirteen categories Parcelscope reads against your address. The Landfill section of a report identifies the closest LMOP-listed MSW landfill within three miles, notes operational status and gas-collection presence where available, gives each finding a distance and a direction, and renders the resulting per-category score on the same plain-language scale as the other twelve hazards. For Bordeaux-adjacent addresses, the report will surface both the closed Bordeaux Landfill and, separately under the broader records picture, the Southern Services C&D site.