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Superfund / NPL site · EPA Superfund SEMS through latest publishNPL Final

Moss-American Co., Inc. (Kerr-Mcgee Oil Co.)

This site is currently on the EPA Superfund National Priorities List and remains under federal cleanup oversight. Most-cited contaminant of concern: Carcinogenic Polycyclic Aromatic Hydrocarbons (Cpah).

8716 N Granville Road, Milwaukee, Wisconsin · ZIP 53244 · EPA ID WID039052626

See Milwaukee ContaminantsEquity contextHow we read Superfund data
CLEANUP TIMELINE

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.

Anomaly engine

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.

Contaminants of concern · per EPA SEMS

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.

ContaminantPathwayCited
Carcinogenic Polycyclic Aromatic Hydrocarbons (Cpah)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Sediment2
2,3,7,8-Tetrachlorodibenzo-P-Dioxin (Tcdd)Surface Water1
2,4-DinitrophenolSediment1
2,4-DinitrophenolSoil1
9H-FluoreneSoil1
BenzeneHealth riskIARC Group 1 carcinogen. Long-term inhalation causes leukemia and bone-marrow disorders. (IARC, EPA)Groundwater1
BenzeneHealth riskIARC Group 1 carcinogen. Long-term inhalation causes leukemia and bone-marrow disorders. (IARC, EPA)Soil1
Benzo(B)FluorantheneSediment1
Benzo(B)FluorantheneSoil1
Benzo(Ghi)PeryleneSediment1
Benzo(Ghi)PeryleneSoil1
Benzo(K)FluorantheneSediment1
Benzo(K)FluorantheneSoil1
Benzo[A]AnthraceneHealth riskPAH; IARC Group 2B possible carcinogen; common combustion byproduct and creosote constituent. (IARC)Sediment1
Benzo[A]AnthraceneHealth riskPAH; IARC Group 2B possible carcinogen; common combustion byproduct and creosote constituent. (IARC)Soil1
Benzo[A]PyreneHealth riskPAH; IARC Group 1 carcinogen; the prototypical PAH used to benchmark PAH-mixture cancer risk. EPA MCL 0.2 µg/L. (IARC, EPA)Sediment1
Benzo[A]PyreneHealth riskPAH; IARC Group 1 carcinogen; the prototypical PAH used to benchmark PAH-mixture cancer risk. EPA MCL 0.2 µg/L. (IARC, EPA)Soil1
CadmiumSediment1
CadmiumSoil1
Carcinogenic Polycyclic Aromatic Hydrocarbons (Cpah)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Groundwater1
Carcinogenic Polycyclic Aromatic Hydrocarbons (Cpah)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Soil1
Carcinogenic Polycyclic Aromatic Hydrocarbons (Cpah)Health riskPAH class includes IARC Group 1 carcinogens (e.g., benzo[a]pyrene); long-term exposure raises cancer risk. (IARC, EPA)Surface Water1
ChloroformSurface Water1
ChryseneSediment1
ChryseneSoil1
Dibenzo(A,H)AnthraceneSediment1
Dibenzo(A,H)AnthraceneSoil1
EthylbenzeneHealth riskIARC Group 2B possible carcinogen; eye and respiratory irritant. (IARC)Groundwater1
EthylbenzeneHealth riskIARC Group 2B possible carcinogen; eye and respiratory irritant. (IARC)Soil1
EthylbenzeneHealth riskIARC Group 2B possible carcinogen; eye and respiratory irritant. (IARC)Surface Water1

Showing the top 30 pairs by SEMS citation count. 18 additional (contaminant, pathway) pairs are recorded for this site.

Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 24 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 systemServesDistancePopulation servedSourceStatus
Park Place Subdivision PrivateMequon2.7 mi260GROUNDWATERIn compliance
Concordia University PrivateMequon2.7 mi1,500GROUNDWATERUNRESOLVED
Highland Colony Estates Condo PrivateMequon2.7 mi88GROUNDWATERIn compliance
Ravine Farms Hm Owners Assoc PrivateMequon2.7 mi100GROUNDWATERIn compliance
Country Terrace Condo Homes PrivateMequon2.7 mi160GROUNDWATERIn compliance
Mequon Water Trust PrivateMequon2.7 mi26GROUNDWATERUNRESOLVED
Mequon Colony Estates PrivateMequon2.7 mi75GROUNDWATERUNRESOLVED
Village Glen Apts PrivateMequon2.7 mi30GROUNDWATERIn compliance
Huntington Park PrivateMequon2.7 mi600GROUNDWATERIn compliance
Mequon Parc Apartments Llc PrivateMequon2.7 mi60GROUNDWATERUNRESOLVED
River Trails Estates Water Users PrivateMequon2.7 mi84GROUNDWATERUNRESOLVED
River Lake Subdivision PrivateMequon2.7 mi100GROUNDWATERIn compliance
Haddonstone Subdivision PrivateMequon2.7 mi195GROUNDWATERIn compliance
Vintage Estates PrivateMequon2.7 mi130GROUNDWATERUNRESOLVED
Wyngate Subdivision PrivateMequon2.7 mi100GROUNDWATERIn compliance
Westchester Lakes Subdivision PrivateMequon2.7 mi300GROUNDWATERIn compliance
Kenilworth Subd PrivateMequon2.7 mi120GROUNDWATERIn compliance
Mequon Trail Townhomes PrivateMequon2.7 mi615GROUNDWATERUNRESOLVED
Woodridge Estates PrivateMequon2.7 mi100GROUNDWATERIn compliance
Mequon On The Square Condominium Owners Association Inc PrivateMequon2.7 mi110GROUNDWATERIn compliance
Brighton Ridge Subdivision PrivateMequon2.7 mi200GROUNDWATERUNRESOLVED
Elm Grove Terrace PrivateMequon2.7 mi75GROUNDWATERIn compliance
Lake Country Apartments PrivateMequon2.7 mi84GROUNDWATERUNRESOLVED
Willow Glen Apartments PrivateMequon2.7 mi80GROUNDWATERUNRESOLVED

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.

Equity context · ACS 2018-2022 block-group demographics

Who Lives Near This Site

Within 1 mile of this site (6 Census block groups, population-weighted demographics): a population of 9,774. Why we surface this →

POPULATION SHARE
51.4%

Low-income

POPULATION SHARE
83.9%

People of color

POPULATION SHARE
15.2%

Under age 5

POPULATION SHARE
8.1%

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.