# ust-ct — Connecticut underground storage tanks

> Look up any of the 12,749 facilities on Connecticut's underground storage tank register: tanks, construction, inspections, enforcement and reported releases, joined from six public files.

## What is under this Connecticut address?

Type the facility identifier, the address, or the name of the site. **12,749** facilities and **49,918** tanks — and one search returns what all six of the state’s files say, which none of them does alone.

Screening a portfolio? [Pro access](/pro.md) resolves a
list of addresses, and the [datasets](/data.md) are published with
their prices — from USD 300 a month for the stream of
changes.

### Six files, one question

Connecticut publishes its tank records as six separate datasets: the tanks,
the people responsible, the inspections, the enforcement actions, the reported
releases, and the list of currently active sites. Every one of them is keyed
on the same facility identifier, and nobody joins them.

So the question a buyer, a lender or an owner actually asks —
*what is under this address, is it still in use, and has anything been
recorded against it?* — has no single place to be answered. That is
what this site is.

### The number that bears on risk

**27,496** of the 49,918 tanks on the register are
recorded as **bare or asphalt-coated steel**, across
8,624 facilities. Unprotected steel in wet ground corrodes, and corrosion
is how a tank starts leaking — it is the construction the federal
upgrade rules were written to replace.

| Tank construction | Tanks | Share |
|---|---|---|
| Asphalt Coated Or Bare Steel | 27,496 | 55.1% |
| Fiberglass Reinforced Plastic | 11,164 | 22.4% |
| Coated & Cathodically Protected Steel (sti-p3) | 7,821 | 15.7% |
| Composite - Steel With Fiberglass (act 100) | 698 | 1.4% |
| Other (specify) | 691 | 1.4% |
| Composite - Steel With Urethane (act 100-u) | 87 | 0.2% |
| Composite - Steel With Plastic Jacket | 44 | 0.1% |
| Falsefalsefalsefalsefalsefalsefalse | 6 | 0.0% |

[Why this is the number worth knowing](/steel.md) — and why
it is not, on its own, a finding about any particular site.

### What the state records, and what it does not

28,899 recorded violations across 3,479 facilities.
7,906 red-tag entries. 8,752 enforcement actions. 3,882 reported
releases, the most recent on **2026-08-13**.

What none of those files contains: how much was spilled, what it was in
the ground, how far it went, or what remains to be done. They record that a
document exists. **No page on this site calls any site
polluted**, because nothing in the source supports it.
[What each record actually is](/records.md).

### The part people do not expect

3,383 of these facilities
are **heating-oil tanks** kept for the building above them
— schools, churches, apartment blocks, offices. They sit on the same
register as filling stations, for the same reason.

| Substance recorded | Facilities | Share |
|---|---|---|
| [Gasoline](/substance/gasoline.md) | 5,100 | 40.0% |
| [Diesel](/substance/diesel.md) | 3,622 | 28.4% |
| [Heating Oil(on-site Consumption)](/substance/heating-oil-on-site-consumption.md) | 3,383 | 26.5% |
| [Not stated](/substance/not-stated.md) | 321 | 2.5% |
| [Used Oil](/substance/used-oil.md) | 194 | 1.5% |
| [Hazardous Substance](/substance/hazardous-substance.md) | 83 | 0.7% |

[All 102 towns](/town.md) · [Bare steel](/steel.md) · [What the records mean](/records.md) · [Reported releases](/releases.md) · [How this site is built](/about.md)

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Página: https://ust-ct.pages.dev/
Fonte: Underground storage tank records — Connecticut Department of Energy and Environmental Protection (six datasets)
Recolha: 2026-08-21