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

Hamilton/Labree Roads Gw Contamination

This site is currently on the EPA Superfund National Priorities List and remains under federal cleanup oversight. Most-cited contaminant of concern: Cis-1,2-Dichloroethene.

Hamilton & Labree Roads, Chehalis, Washington · ZIP 98532 · EPA ID WASFN1002174

See Lewis 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
Cis-1,2-DichloroetheneHealth riskTCE biodegradation intermediate. EPA MCL 70 µg/L; lower toxicity than parent solvents but commonly co-occurs in groundwater plumes. (EPA)Groundwater1
Dichloromethane (Methylene Chloride)Health riskIARC Group 2A probable carcinogen; central-nervous-system depressant; banned for most consumer paint-stripper uses. (IARC, EPA)Groundwater1
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)Groundwater1
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)Sediment1
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)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)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)Sediment1
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
Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 26 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
Lake Mayfield Community Club PrivateNapavine2.9 mi88GROUNDWATERIn compliance
Township Place PrivateNapavine2.9 mi56GROUNDWATERIn compliance
Pleasant Forest Camping Club PrivateNapavine2.9 mi327GROUNDWATERIn compliance
Columbia Crest Estates PrivateNapavine2.9 mi48GROUNDWATERIn compliance
Winlock Waters 2 PrivateNapavine2.9 mi25GROUNDWATERUNRESOLVED
Grand Mound Motel PrivateNapavine2.9 mi36GROUNDWATERIn compliance
Carrolls Water Assn PrivateNapavine2.9 mi449GROUNDWATERUNRESOLVED
River Oaks Rv Park & Campground PrivateNapavine2.9 mi50GROUNDWATERIn compliance
Flying Carpet Mobile Estates PrivateNapavine2.9 mi174GROUNDWATERIn compliance
Newaukum Ventures PrivateNapavine2.9 mi186GROUNDWATERIn compliance
Gunderson Water Works PrivateNapavine2.9 mi53GROUNDWATERIn compliance
Lakeside Village PrivateNapavine2.9 mi94GROUNDWATERIn compliance
Lewis Co Water Dist #1 MunicipalNapavine2.9 mi1,174GROUNDWATERUNRESOLVED
Malone PrivateNapavine2.9 mi181GROUNDWATERIn compliance
Mayfield Kamper Klub PrivateNapavine2.9 mi87GROUNDWATER2 HEALTH-BASED · 5YR
Napavine City Of MunicipalNapavine2.9 mi3,095GROUNDWATERIn compliance
Winston Creek Rv Park PrivateNapavine2.9 mi50GROUNDWATERIn compliance
Patterson Lake Water PrivateNapavine2.9 mi79GROUNDWATERIn compliance
Redmon Mobile Home Park PrivateNapavine2.9 mi105GROUNDWATERIn compliance
Silverbrook Mh & Rv PrivateNapavine2.9 mi42GROUNDWATERIn compliance
Skate Creek Terrace Association PrivateNapavine2.9 mi39GROUNDWATERIn compliance
Skookumchuck Mobile Manor PrivateNapavine2.9 mi90GROUNDWATERIn compliance
Timberlane Mobile Home Park PrivateNapavine2.9 mi63GROUNDWATER2 HEALTH-BASED · 5YR
Timberlane Mobile Estates PrivateNapavine2.9 mi120GROUNDWATERIn compliance
Whispering Woods Home Park PrivateNapavine2.9 mi125GROUNDWATERIn compliance
Prairie Village Llc PrivateNapavine2.9 mi55GROUNDWATERIn 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.

Equity context · ACS 2018-2022 block-group demographics

Who Lives Near This Site

Lewis County, Washington (no Census block groups within 1 mile and no host city — falling back to containing county): a population of 82,663. Why we surface this →

POPULATION SHARE
12.3%

Low-income

POPULATION SHARE
18.8%

People of color

POPULATION SHARE
5.8%

Under age 5

POPULATION SHARE
21.0%

Over age 64

Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror). 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.