Datastruct
DATASTRUCT
Data source · Massachusetts Department of Environment…

Tier Classified 21E Sites

Statewide layer of currently active oil or hazardous-material disposal sites classified under Chapter 21E and the Massachusetts Contingency Plan.

FreeAPIFull fileSubnational
What it answers ↓
2Questions answered
4Fields delivered
1Region
Source CON Parcel environment… CON Parcel environment… FEA Environmental site… FEA Environmental site… FEA Environmental site… FEA Street address

Questions this answers

2 · best fit first
QuestionPrimary fit
Parcel environmental remediation case history

MassDEP’s statewide layer identifies currently active Tier Classified disposal sites by RTN, site name, address, town, status code, and site-detail URL.
QuestionSupporting fit
Parcel environmental remediation case status

The layer emits raw TIERI, TIERII, and TIER1D classifications for currently active identified RTNs; closure or milestone dates are not supplied.

Fields it delivers

4 fields
Environmental site descriptionEnvironmental site nameEnvironmental site statusStreet address
CoverageSubnational

First-party agency product and GIS material describes this as a Massachusetts statewide or state-program dataset. Coverage is limited to the regulated/program population described by the product, not every site in the state.

Massachusetts, United States
Access & termsFree

The cited public agency dataset, lookup, download, or API endpoint is directly available without an order, subscription, membership, or payment step. The standing route represented by this source is therefore free; any optional records services outside that route are not part of this classification.

Want Tier Classified 21E Sites tested on your records?

We run match and fill rates on a sample of your data, then handle the contract, security review, and delivery into your stack if it earns its place.