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

Palermo Well Field Ground Water Contamination

This site is currently on the EPA Superfund National Priorities List and remains under federal cleanup oversight. Most-cited contaminant of concern: Tetrachloroethene.

Palermo Avenue & O Street, Tumwater, Washington · ZIP 98501 · EPA ID WA0000026534

See Thurston 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
TetrachloroetheneHealth riskPCE / 'perc'. IARC Group 2A probable carcinogen; central-nervous-system effects; common dry-cleaning solvent and DNAPL plume contaminant. EPA MCL 5 µg/L. (IARC, EPA)Groundwater2
TetrachloroetheneHealth riskPCE / 'perc'. IARC Group 2A probable carcinogen; central-nervous-system effects; common dry-cleaning solvent and DNAPL plume contaminant. EPA MCL 5 µg/L. (IARC, EPA)Soil2
TetrachloroetheneHealth riskPCE / 'perc'. IARC Group 2A probable carcinogen; central-nervous-system effects; common dry-cleaning solvent and DNAPL plume contaminant. EPA MCL 5 µg/L. (IARC, EPA)Air1
TetrachloroetheneHealth riskPCE / 'perc'. IARC Group 2A probable carcinogen; central-nervous-system effects; common dry-cleaning solvent and DNAPL plume contaminant. EPA MCL 5 µg/L. (IARC, EPA)Soil Gas1
TetrachloroetheneHealth riskPCE / 'perc'. IARC Group 2A probable carcinogen; central-nervous-system effects; common dry-cleaning solvent and DNAPL plume contaminant. EPA MCL 5 µg/L. (IARC, EPA)Surface Water1
TrichloroetheneHealth riskTCE. IARC Group 1 carcinogen — kidney cancer; suspected liver cancer and non-Hodgkin lymphoma. EPA MCL 5 µg/L; common DNAPL groundwater plume contaminant. (IARC, EPA, ATSDR)Groundwater1
TrichloroetheneHealth riskTCE. IARC Group 1 carcinogen — kidney cancer; suspected liver cancer and non-Hodgkin lymphoma. EPA MCL 5 µg/L; common DNAPL groundwater plume contaminant. (IARC, EPA, ATSDR)Soil1
TrichloroetheneHealth riskTCE. IARC Group 1 carcinogen — kidney cancer; suspected liver cancer and non-Hodgkin lymphoma. EPA MCL 5 µg/L; common DNAPL groundwater plume contaminant. (IARC, EPA, ATSDR)Surface Water1
Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 29 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
Lakeland Manor MunicipalTumwater1.1 mi122GROUNDWATERUNRESOLVED
Maple Manor Mobile Home Park PrivateTumwater1.1 mi120GROUNDWATERIn compliance
Mcneil Island Water State-ownedTumwater1.1 mi692GROUNDWATERUNRESOLVED
Tumwater City Of MunicipalTumwater1.1 mi51,802GROUNDWATERIn compliance
Nisqually-Leschi & West Nisqually TribalOlympia2.7 mi3,200GROUNDWATERIn compliance
Olympic Park Trailer Court PrivateOlympia2.7 mi169GROUNDWATERIn compliance
Cuyamaca TribalOlympia2.7 mi375GROUNDWATERIn compliance
Haynes Acres Division 1 PrivateOlympia2.7 mi74GROUNDWATERUNRESOLVED
Woodard Place PrivateOlympia2.7 mi94GROUNDWATERIn compliance
Ski View Estates PrivateOlympia2.7 mi47GROUNDWATERUNRESOLVED
Cooper Point Estates PrivateOlympia2.7 mi36GROUNDWATERIn compliance
Pioneer PrivateOlympia2.7 mi84GROUNDWATERIn compliance
Bethel Water Co PrivateOlympia2.7 mi270GROUNDWATERIn compliance
Grand Mound MunicipalOlympia2.7 mi3,764GROUNDWATERIn compliance
Black Lake Bible Camp & Conf Ctr PrivateOlympia2.7 mi477GROUNDWATERIn compliance
Boston Harbor MunicipalOlympia2.7 mi1,153GROUNDWATERUNRESOLVED
Carlyon Beach Homeowners PrivateOlympia2.7 mi1,273GROUNDWATERUNRESOLVED
Cedar Crest Mobile Home Park PrivateOlympia2.7 mi92GROUNDWATERIn compliance
Country Club Estates 521 MunicipalOlympia2.7 mi113GROUNDWATER15 HEALTH-BASED · 5YR
Delphi Daubel PrivateOlympia2.7 mi29GROUNDWATERIn compliance
Spanaway Village Water System PrivateOlympia2.7 mi125GROUNDWATERIn compliance
Cloister PrivateOlympia2.7 mi29GROUNDWATERIn compliance
Black Lake Acres PrivateOlympia2.7 mi104GROUNDWATERUNRESOLVED
North Offut Lake Wtr Service PrivateOlympia2.7 mi97GROUNDWATERIn compliance
Olympia City Of MunicipalOlympia2.7 mi126,966GROUNDWATERIn compliance
Mountain Valley Water System PrivateOlympia2.7 mi126GROUNDWATERIn compliance
Salt Aire Mobile Terrace PrivateOlympia2.7 mi23GROUNDWATERIn compliance
Sexton PrivateOlympia2.7 mi35GROUNDWATERIn compliance
Tamoshan MunicipalOlympia2.7 mi260GROUNDWATERUNRESOLVED

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 (5 Census block groups, population-weighted demographics): a population of 7,473. Why we surface this →

POPULATION SHARE
28.3%

Low-income

POPULATION SHARE
17.2%

People of color

POPULATION SHARE
5.6%

Under age 5

POPULATION SHARE
15.8%

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.