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Nelson Contamination Data Hubs: United States and Canada

Three public hubs, compiled from agency source files and published with record counts, dates, downloads and a versioned release history. Free to read, quote and cite with attribution.

Cell shading rises with record density. Records without usable coordinates are not drawn.

20,346

Records across published datasets

0

Source datasets

2026.08.21

Current release, August 21, 2026

Cite this compilation

Nelson Environmental Remediation Ltd. (2026). North American contamination dataset compilation, release 2026.08.21. Retrieved from https://nelsonremediation.com/data/releases/2026.08.21.

Dataset compilation copyright 2026 Nelson Environmental Remediation Ltd. All rights reserved. Source attribution required. Reuse, republication, redistribution or model training on this compilation must credit Nelson Environmental Remediation Ltd. and link to nelsonremediation.com.

Methodology

Release history

Licence and attribution

Open the map

Three contamination hubs, one click away

Each card is a live density plot of that hub's records. Click anywhere on a card to open the interactive map.

11,046 recordsPFAS contamination, North AmericaDrinking water detections, monitoring stations, federal sites and defence installations across the United States and Canada, on one canvas with jurisdiction drilldowns.

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78,712 recordsPetroleum hydrocarbon contamination, North AmericaOpen petroleum releases, closure cohorts and pipeline incidents, benchmarked so one state or province can be read against another.

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13,725 recordsMilitary and defence contamination, North AmericaFormerly used defence sites, National Defence custodial land, project dossiers and the sites where a PFAS record describes the same ground.

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6 datasets, 11,046 records

PFAS contamination, North America

Drinking water detections, monitoring stations, federal sites and defence installations across the United States and Canada, on one canvas with jurisdiction drilldowns.

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Dataset

Coverage

Records

As of

Download

EPA UCMR 5 drinking water resultspfas-ucmr5.json · 621 KB · sha256 55af6f4072032254

United States

3,453

August 13, 2026

JSON

Water Quality Portal PFAS monitoring stationspfas-wqp-stations.json · 1.0 MB · sha256 89534414cfd660a3

United States and Canada

6,256

August 13, 2026

JSON

EPA SEMS Superfund sites with PFAS recordspfas-us-superfund.json · 175 KB · sha256 b6b02f71b1d03b33

United States

476

August 13, 2026

JSON

DoD PFAS assessment installationspfas-us-dod-installations.json · 169 KB · sha256 ae3521ebd4a083ae

United States

353

July 11, 2026

JSON

Federal Contaminated Sites Inventory PFAS sitespfas-canada-fcsi.json · 59 KB · sha256 9458ced6c98eb6fc

Canada

98

August 13, 2026

JSON

AFFF overlap layer (derived)afff-overlap.json · 298 KB · sha256 1b57e16e559e3e9f

United States and Canada

410

August 16, 2026

JSON

8 datasets, 78,712 records

Petroleum hydrocarbon contamination, North America

Open petroleum releases, closure cohorts and pipeline incidents, benchmarked so one state or province can be read against another.

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Dataset

Coverage

Records

As of

Download

EPA open leaking underground storage tank releaseshc-us-lust-open.json · 2.2 MB · sha256 62fe9d93b996fccf

United States

65,894

August 16, 2026

JSON

LUST release and closure totals by statehc-us-lust-state.json · 39 KB · sha256 7eedfe632efcf822

United States

51

August 16, 2026

JSON

LUST release totals by countyhc-us-lust-county.json · 443 KB · sha256 9d748bcc20611792

United States

3,142

August 16, 2026

JSON

LUST closure cohorts by statehc-us-lust-cohorts.json · 117 KB · sha256 9b1f031cd3e5d016

United States

51

August 16, 2026

JSON

Texas closure detailhc-us-tx-closures.json · 6 KB · sha256 b95da0e8a49493a2

Texas

40

August 16, 2026

JSON

Federal Contaminated Sites Inventory petroleum siteshc-canada-fcsi.json · 1.3 MB · sha256 443f487de12f3c49

Canada

8,021

August 16, 2026

JSON

Canadian petroleum closure cohorts by provincehc-ca-fcsi-cohorts.json · 36 KB · sha256 52dd52e78dcd8fa8

Canada

13

August 16, 2026

JSON

Canada Energy Regulator pipeline incidentshc-recent-events.json · 486 KB · sha256 8be0db76163b6dfb

Canada

1,500

August 16, 2026

JSON

2 datasets, 13,725 records

Military and defence contamination, North America

Formerly used defence sites, National Defence custodial land, project dossiers and the sites where a PFAS record describes the same ground.

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Dataset

Coverage

Records

As of

Download

Military and defence contaminated sitesmilitary-sites.json · 1.7 MB · sha256 ceb5cf3d9863810a

United States and Canada

9,840

August 16, 2026

JSON

Military site project dossiersmilitary-site-details.json · 2.0 MB · sha256 e085d53c773e8ddd

United States and Canada

3,885

August 16, 2026

JSON

Using these files

JSON files are the published compilation exactly as the maps read them. CSV exports are generated in your browser from the same file and carry the attribution line in the header rows. Cite the release version, not the download date, so anyone checking your figure sees the numbers you saw.

Questions about a figure, or a reuse beyond citation: contact Nelson.