Tysons Dump
This site is currently on the EPA Superfund National Priorities List and remains under federal cleanup oversight. Most-cited contaminant of concern: 1,2,3-Trichloropropane.
310 Brownlie Rd., King of Prussia, Pennsylvania · ZIP 19406 · EPA ID PAD980692024
Listing-date and cleanup-phase enrichment from EPA's per-site SEMS profile is queued for a follow-up ingest pass. Until then, this section will populate from EPA's published timeline data.
Notable Signals
No notable signals at this Superfund site for the current ingest. Cleanup-phase and SEMS-action flags are deferred to a follow-up engineering pass.
What's In This Site
Each row pairs a contaminant with the medium it was found in (the exposure pathway). Hover any named contaminant for an agency-cited health-risk summary. Cited count = number of SEMS decision records (RODs and related) that name the pair.
Showing the top 30 pairs by SEMS citation count. 15 additional (contaminant, pathway) pairs are recorded for this site.
Groundwater Systems Serving Communities Within 3 Miles
The 9 systems below draw on groundwater (or mixed sources) and serve communities whose centroid sits within 3 miles of this site. Distance is to the served-city centroid — SDWIS does not expose individual wellhead locations, so this is a proximity screen, not a wellhead-impact assessment.
| Water system | Serves | Distance | Population served | Source | Status |
|---|---|---|---|---|---|
| Fairmount Mhp, L.P. Private | King Of Prussia | 1.4 mi | 80 | In compliance | |
| Warwick Water Works Private | King Of Prussia | 1.4 mi | 98 | UNRESOLVED | |
| Harrisonville Mobile Home Park Private | Norristown | 1.4 mi | 100 | In compliance | |
| Creekview Mhp Private | Norristown | 1.4 mi | 200 | UNRESOLVED | |
| Awc Valley Forge Crossing Mhp Private | Norristown | 1.4 mi | 250 | UNRESOLVED | |
| Woodland Mhp Private | Norristown | 1.4 mi | 61 | In compliance | |
| Hereford Est Mhp Private | Norristown | 1.4 mi | 710 | UNRESOLVED | |
| Mt Village Mhp Private | Norristown | 1.4 mi | 771 | UNRESOLVED | |
| Paw Berry Hollow Private | Norristown | 1.4 mi | 70 | In compliance |
Methodology: served-city centroid (TIGER 2020) is used as the PWS coordinate. Source-water classification from SDWIS primary_source_code; only groundwater and mixed-source systems are queried. Click any system above for its full SDWIS profile.
Who Lives Near This Site
Within 1 mile of this site (12 Census block groups, population-weighted demographics): a population of 17,903. Why we surface this →
Low-income
People of color
Under age 5
Over age 64
Source: Census ACS 2018-2022 block-group demographics, population-weighted across the 1-mile buffer around this site (from USEPA-clone/EJAM-open blockgroupstats). NPL site proximity contributes to the national EJ pattern; indicator-level percentile and disparity scores are surfaced on the county page and the state page.
Source. EPA Superfund Enterprise Management System (SEMS) · retrieved 2026-05-07. SEMS is a federal public-domain dataset under 17 USC §105.
What this is not. We report EPA's published Superfund record — site listing, status, and contaminants of concern as named in EPA's decision documents. We do not perform site visits, independent air or water sampling, or current-state health-risk assessment. NPL listing reflects EPA's Hazard Ranking Score at a point in time; it does not by itself describe present-day exposure.