Oil Tank Removal Requirements by State (2026)

What are the key oil tank removal statistics?

Maryland requires permanent closure within 30 days after an owner decides to abandon heating oil as the fuel source or decides to remove a qualifying residential or farm underground tank. This oil tank removal requirements by state dataset compares all 50 states and keeps that closure question separate from the different question of whether a tank sits inside a routine environmental UST program.

1. Maryland requires permanent closure within 30 days after the triggering decision for a qualifying residential or farm heating-oil UST (Maryland Department of the Environment, 2024 fact sheet; COMAR 26.10.01.13; verified July 27, 2026).
2. 40 CFR 280.12 excludes a tank storing heating oil for consumptive use on the premises from the federal UST definition (Electronic Code of Federal Regulations; verified July 27, 2026).
3. EPA states that state or local agencies may regulate heating-oil tanks excluded from federal UST rules, so the federal exclusion is not a complete property-level answer (U.S. EPA; verified July 27, 2026).
4. Connecticut sets no removal deadline for an intact, nonleaking residential heating-oil UST, but a leaking tank must be promptly emptied and removed (Connecticut DEEP; verified July 27, 2026).
5. New Hampshire's new residential underground heating-oil law was approved June 5, 2026 and takes effect August 4, 2026 (HB 1620, Chapter 122; verified July 27, 2026).
6. Wisconsin requires an abandoned regulated residential UST to be permanently closed within 60 days and requires at least five business days' advance notice (Wisconsin DATCP; verified July 27, 2026).
7. Rhode Island treats a qualifying residential UST as abandoned after more than 180 days out of service without approved temporary status and charges $75 per tank for closure (250-RICR-140-25-1; verified July 27, 2026).
8. Hartford's current Fire Marshal storage-tank-removal form lists a fee of $75 per tank (City of Hartford; verified July 27, 2026).
9. Maine requires a tank, piping, or facility that has been out of service for 12 months to be removed within 60 days unless written approval to remain out of service is obtained, and requires at least 10 days' notice before removal work (Maine DEP, 06-096 C.M.R. ch. 691; verified July 27, 2026).
10. Michigan generally requires a residential heating-oil tank to be emptied, cleaned, and removed after more than 12 months out of service or when no future use is intended, unless removal would threaten structural integrity (Michigan LARA; verified July 27, 2026).
11. Minnesota's MPCA program reaches heating-oil USTs over 1,100 gallons; regulated closure uses 10 days' advance notice and a post-closure filing within 30 days (Minnesota MPCA; verified July 27, 2026).

Does federal law require removing a heating-oil tank?

The federal UST regulations do not impose a universal residential heating-oil removal rule. A tank used to store heating oil for consumptive use on the premises is excluded from the federal UST definition in 40 CFR 280.12, while EPA expressly directs readers to state and local authorities because those jurisdictions may regulate excluded tanks.

The exclusion is part of the definition that determines whether 40 CFR Part 280 applies at all. It is different from the separate exclusion for a farm or residential motor-fuel tank of 1,100 gallons or less. The 1,100-gallon federal threshold belongs to that motor-fuel category; it is not the basis for the on-premises heating-oil exclusion.

That distinction has a direct closure consequence. The federal permanent-closure timetable in Part 280 cannot be applied automatically to a tank that Part 280 excludes. A state may adopt a different rule, and an adopted fire code may create an out-of-service clock, but neither becomes a nationwide residential rule merely because it resembles the federal regulated-UST provision.

What does EPA's regulated-tank data measure?

EPA's March 2026 performance page reports 534,189 active federally regulated petroleum USTs at approximately 190,224 facilities. EPA also reports cumulative release and cleanup measures for that regulated universe. Those figures describe federally regulated systems; they must not be presented as a count of buried residential heating-oil tanks, because qualifying on-premises heating-oil tanks are outside the federal UST definition.

Source: 40 CFR 280.12; EPA Frequent Questions About USTs; EPA UST Performance Measures. Verified July 27, 2026.

Who sets oil tank removal rules?

A residential heating-oil tank can sit outside an environmental UST program and still face a fire-code closure rule, a local permit, contractor qualifications, or release-cleanup duties. The controlling answer therefore comes from several legal layers, not from a single "regulated or exempt" label.

The release layer sits beside the tank-program answer rather than beneath it. A state can exclude a tank from routine registration and still require immediate reporting, investigation, soil or groundwater work, and agency closure when petroleum has escaped.

What are the oil tank removal requirements by state?

The 50-state table is the page's primary original dataset. Every row separates the official source's tank-program finding from the separate removal or closure trigger, and every row links directly to the issuing statute, rule, agency page, official form, or code compilation used for the July 27, 2026 verification.

The table is intentionally conservative where the official source is narrow. A row that proves only an on-premises heating-oil exclusion stops at that finding rather than turning silence into "removal is not required." That limitation is part of the dataset, not a missing answer.

Which states set a specific closure deadline?

Some jurisdictions use a calendar deadline; others use an event such as conversion, sale, replacement, or the owner's decision to abandon heating oil. The table below includes only clocks and event triggers established by the cited official source and states the tank category or adoption condition that limits each one.

The comparison shows why a national "deadline" is misleading. Maryland's 30-day rule is a state residential closure requirement; Wisconsin's 60-day rule applies to its regulated residential UST category; the one-year fire-code provision applies only where adopted and within scope; New Hampshire and Oregon use event triggers rather than a simple countdown.

Who may legally remove a heating-oil tank?

Worker qualifications vary almost as much as the closure triggers. Some states require a certified individual or firm, some regulate only tanks above a capacity threshold, some let an owner perform the work personally, and some leave the worker question to the local fire or building authority.

The categories should not be mixed. Connecticut's rule establishes what a registered home-improvement contractor must carry and complete; it does not, by itself, prove a blanket prohibition or permission for every owner. Minnesota's certified-contractor rule belongs to the MPCA-regulated category above 1,100 gallons, not automatically to every small home tank.

What notice is required before closure?

Notice can go to an environmental agency, fire department, permit office, or utility-locate system, and those notices serve different purposes. A utility-locate call does not replace a closure permit, and a state agency's lack of advance notice does not remove the deadline or qualification rules that still apply.

A property can have more than one notice obligation. The table reports the identified statewide requirement; a municipality may also require an application, inspection appointment, demolition permit, or fire-marshal notice.

What changes when a tank has leaked?

A program exemption usually does not exempt petroleum contamination. A leaking tank can trigger reporting, cleanup, qualified-contractor, sampling, groundwater, and agency-closure duties even where the intact tank was outside routine registration.

Four distinctions keep the legal and factual claims accurate:

• Closure without a release: an out-of-service clock or conversion event can require closure even when no contamination is documented.
• Cleanup without routine tank regulation: a state can exclude the intact residential tank from its UST program and still regulate the petroleum release.
• Removal is not cleanup closure: taking the tank out does not prove that affected soil or groundwater has been investigated or resolved.
• Closure in place does not erase historical liability: an approved tank-closure method does not settle an earlier discharge unless the cleanup authority says it does.

How do official sources treat assessment and sampling?

Connecticut recommends photographs, contractor documentation, and appropriate laboratory sampling and requires the spill-cleanup process when a known release exists. Michigan requires a site assessment for tanks of 1,100 gallons or more and recommends one for smaller tanks. Minnesota strongly recommends closure assessment and separates that recommendation from the threshold that determines MPCA program coverage. Oregon and New Jersey use dedicated heating-oil decommissioning or remediation frameworks with certified records and release-specific requirements.

These are not interchangeable national standards. A laboratory method, action level, sample count, or cleanup endpoint should be quoted only with the state, tank category, release condition, and issuing program that gives it meaning.

Excavation around a buried tank, tank entry, cutting, vapor control, and contaminated-material handling are hazardous operations. This page reports legal and program facts; it does not provide a work procedure. The applicable authority and qualified professionals determine how the work is performed safely.

Source: Connecticut DEEP; Michigan LARA; Minnesota MPCA; Oregon DEQ; New Jersey DEP. Verified July 27, 2026.

Where does the one-year out-of-service rule come from?

The 2021 International Fire Code (IFC) Section 5704.2.13.1.3 addresses underground storage tanks that have been out of service for one year. That provision is part of a model code published by the International Code Council and adopted by reference in many states and municipalities. It is not self-executing federal or national law.

The provision matters only after adoption. A state or municipality can adopt the model text, amend it, limit its scope, authorize an extension, or use a different code family. Ohio's current rule, effective November 20, 2025, incorporates the one-year provision and adds an extension mechanism. Washington PLIA directs owners to the local fire chief or fire marshal because the local adopted code supplies the operative requirement.

This explains why the same one-year phrase can appear in jurisdictions whose environmental agencies exclude home heating-oil tanks. The environmental program answers whether its tank rules apply; the adopted fire code answers a different out-of-service and fire-safety question.

Connecticut's answer should not be inferred from the IFC model. CT DEEP's own residential FAQ supplies the publishable statewide statement: no removal deadline for an intact, nonleaking residential heating-oil UST, with prompt emptying and removal required for a leaking tank.

Source: 2021 International Fire Code Chapter 57; Ohio Admin. Code 1301:7-7-57; Washington PLIA; Connecticut DEEP FAQ. Verified July 27, 2026.

Which states offer financial assistance?

Financial assistance is separate from the legal closure rule and changes faster than most statutes. A program can pay only for cleanup, limit eligibility by income, require approval before work, carry a long review queue, or close to new applications while the underlying tank obligations remain.

Program status should be rechecked before publication updates and before anyone relies on funding. The page reports what the issuing office states; it does not treat a maximum award as a guaranteed payment or a cleanup fund as reimbursement for routine removal.

What are Connecticut's oil tank removal requirements?

Connecticut sets no deadline for removing an intact, nonleaking residential underground heating-oil tank. A leaking tank must be promptly emptied and removed, the release must be reported, and contamination must be addressed through the state's spill-cleanup framework.

For underground oil tank removal in Hartford, CT, the city's Fire Marshal process and CT DEEP contractor qualification rules apply on top of this state framework — see the Hartford section below and the Research Library for agency contact details.

Where does the state UST program stop?

CT DEEP's routine UST program is directed to nonresidential systems, while its residential heating-oil material addresses tanks serving four or fewer residential units. That program boundary does not remove DEEP's authority over a petroleum release, and it does not answer the town's permit or Fire Marshal requirements.

The often-repeated Connecticut deadline for older unprotected steel USTs belongs to the nonresidential program. It should not be imported into a single-family residential answer without a source that places that property and tank inside the regulated category.

Who may perform residential underground tank work?

A registered home-improvement contractor performing residential underground heating-oil tank removal or replacement must maintain $1,000,000 in liability insurance, complete a DEEP-approved 40-hour HAZWOPER course with the annual eight-hour refresher, and complete the specified International Code Council U2 decommissioning training. Trade-licensed work on fuel piping remains subject to the applicable occupational licensing rules.

These are contractor qualifications, not a statewide removal deadline. The distinction is why Connecticut can have no state clock for an intact tank and still regulate the qualifications of a contractor hired to remove or replace one.

What documentation and sampling does CT DEEP recommend?

CT DEEP recommends documenting the tank and excavation, retaining the contractor's report, and using appropriate laboratory analysis when evaluating the site. When a leak is known before removal or discovered during the work, the release enters the spill-reporting and cleanup process and remedial work uses a permitted spill-cleanup contractor.

The page labels those items correctly: agency guidance and release-driven obligations are not converted into a universal statutory sampling mandate for every intact tank.

What must a Connecticut seller disclose?

Connecticut's current Residential Property Condition Report asks whether an underground storage tank is or was present and requests related age, location, problem, and removal information. Under the form and C.G.S. §20-327c, a seller required to furnish the report who fails to do so must credit the purchaser $500 at closing.

The former draft's $300 figure came from older material and has been corrected to the current $500 amount shown on the Department of Consumer Protection form revised in 2025.

How much of Connecticut does this affect?

The Census Bureau's American Community Survey Table B25040 measures occupied housing units by primary heating fuel at state and local levels. It is useful for describing heating-fuel use, but it does not identify whether a property has an underground tank, whether a tank is active or abandoned, or whether a release exists.

This page therefore does not convert an oil-heating household count into a buried-tank count. It also does not combine broader "petroleum products" categories with a narrower heating-oil series as though the denominators were identical.

Source: Connecticut DEEP; Connecticut DCP; current Residential Property Condition Report; C.G.S. Chapter 400; U.S. Census Bureau ACS Table B25040. Verified July 27, 2026.

What does Hartford require?

Hartford uses a Fire Marshal Storage Tank Removal Inspection application. The current form lists a $75 fee per tank, while the city's homeowner permitting guide says a residential building permit is not required specifically for underground oil-tank removal and directs the owner to contact the Fire Marshal.

Is there a Hartford County permitting office?

No. Connecticut abolished county government in 1960; counties remain geographic and judicial designations rather than general-purpose permitting governments. A property outside the City of Hartford must use its own town or city building department and fire marshal rather than a "Hartford County" permit office.

This dataset does not publish unverified municipal rows for the rest of the historical county. A future town-level expansion should add each municipality only after checking that municipality's current form, fee, permit, code, and issuing office.

Source: Connecticut Office of Legislative Research, Report 2015-R-0274; City of Hartford. Verified July 27, 2026.

Why are these rules changing now?

Recent changes are visible in the primary sources rather than inferred from market commentary. New Hampshire approved a new residential underground-tank law in June 2026; Ohio's current Chapter 57 fire-code rule became effective November 20, 2025; and New Jersey readopted its Heating Oil Tank System Remediation Rules effective June 24, 2025.

Financial programs are changing at the same time. Maryland's residential reimbursement stopped accepting applications in July 2024. Washington's former heating-oil insurance policy expired June 30, 2025, and PLIA now publishes a separate loan-and-grant route. New Jersey's funding material warns of a substantial review wait caused by demand.

The fragmentation itself creates the need for a dated reference. Environmental exclusions, adopted fire codes, local permits, contractor rules, release programs, and assistance programs do not update on one schedule. A trustworthy state comparison must preserve source dates and refresh the actual rows rather than merely changing the year in the title.

How was this dataset built?

This dataset was built as a jurisdiction-by-jurisdiction regulatory compilation, not as a survey, estimate, or legal-content rewrite. The original evidence is the normalized 53-row file: all 50 states plus the federal UST layer, the 2021 International Fire Code model layer, and the Hartford municipal layer.

What was collected?

For each state, Hartford Tank Removal Research recorded:

• tank scope and capacity or date conditions;
• whether the routine state tank program includes or excludes the residential heating-oil category;
• the removal, closure, conversion, sale, abandonment, or out-of-service trigger established by the source;
• the deadline or timing, where the source supplies one;
• the permit or notice authority;
• the contractor, certification, or owner-performed-work rule established by the source;
• whether assessment or sampling is required, recommended, or release-driven;
• the separate release and local-code overlay;
• the effective or source date;
• the primary-source URL; and
• the July 27, 2026 verification date.

Which sources were accepted?

Accepted evidence was limited to official statutes, regulations, administrative-code publishers, environmental agencies, fire marshals, issuing municipal offices, official forms, EPA, the eCFR, and the official ICC model-code text. Commercial contractor pages, directories, forum posts, and secondary legal summaries were not used as published authority.

Some official sources are guidance rather than law. The page identifies them as guidance and does not promote a recommendation into a legal mandate. Where an official source has an older revision date, that date is preserved rather than hidden.

How were the state rows coded?

Program applicability and closure obligation were coded separately. If the official source proves only that an on-premises heating-oil tank is excluded from a routine UST program, the row says that the cited program source does not itself establish a statewide residential removal deadline. It does not say "no removal required."

The same rule applies to worker qualifications and sampling. A certification rule that applies only above 1,100 gallons is not extended to a 275-gallon home tank. A sampling recommendation is not labeled mandatory. A local application is not presented as a county or statewide permit.

How were conflicts handled?

The evidence priority was:

1. current enacted statute or regulation;
2. current issuing-agency page or official form;
3. current official guidance;
4. older official guidance with its source date disclosed.

Where two current official sources appear to conflict, the page states both findings and flags the ambiguity rather than choosing a single answer without basis.

What was not measured?

This dataset does not include: estimated tank counts, price ranges, contractor directories, site-specific legal opinions, or unenacted bills and proposed rules. Figures requiring a survey, model, or estimate methodology beyond the cited official source are not published here.

What are the dataset's limitations?

This is a state-level reference, not a property-specific legal determination. A tank's location, capacity, installation date, construction, building type, occupancy, current use, release history, heating-system conversion, and property transfer can change the answer.

Local rules remain material. A state environmental source may not administer fire code, building code, demolition permits, utility locates, waste disposal, or municipal inspections. The table therefore does not convert a state program exclusion into a local permission.

Model code is not enacted law by itself. The International Fire Code row identifies a reusable model provision. Its one-year rule governs only after adoption and only within the adopted scope, subject to local amendments and official discretion.

Some official publications have older source dates. The California code compilation and Massachusetts residential guide disclose their source vintage. Oklahoma's cited statutory compilation also carries its publication date. Their state rows are deliberately narrow and do not claim more than those official materials establish.

Montana's current official sources conflict at exactly 1,100 gallons. The July 2025 UST notification form says "1,100 gallons or less." The current DEQ assistance page says "less than 1,100 gallon capacity" in one program summary and "1,100 gallons or less" elsewhere on the same page. This edition leaves that boundary visible and directs an exactly 1,100-gallon system to Montana DEQ rather than choosing one formulation silently.

Washington does not have one uniform local closure process. PLIA directs readers to the local fire chief or fire marshal. The page therefore reports the model-code pattern without inventing a statewide worker credential or permit that the state source does not establish.

The District of Columbia is not included. The downloadable file contains 50 state rows plus federal, model-code, and Hartford layers.

This dataset does not count tanks or estimate price. No nationwide administrative count of buried residential heating-oil tanks was identified, and no cost figure with a single national method, sample, scope, and date was adopted. Those gaps remain visible rather than being filled with unsupported numbers.

What files can be downloaded?

The downloadable evidence files contain 53 rows: 50 states, the federal UST layer, the 2021 International Fire Code model layer, and the Hartford municipal layer. The CSV and JSON use matching fields for scope, program treatment, closure trigger, timing, authority, notice, worker requirement, assessment, release overlay, source date, source URL, and verification date.

The checksums identify the exact files described by this page. A later substantive update should publish a new version date, regenerate both files, update the checksums, and update dateModified only after the affected sources are rechecked.

How should this page be cited?

The details below identify the publication, page title, canonical URL, verification date, and dataset version associated with this edition. They are provided as neutral attribution metadata and do not request or condition use of the page.

What are the most common questions?

The answers below repeat the page's operative findings in standalone form. Each answer preserves the jurisdictional qualifier that prevents a program exemption, model code, or local rule from being quoted as a national mandate.

Which primary sources support this page?

The source list below contains the official federal, state, model-code, and municipal materials used for the page and dataset. Per-state source URLs also appear in the HTML table and in the primary_source_url field of both downloads.

1. Electronic Code of Federal Regulations, 40 CFR 280.12 — Definitions
2. Electronic Code of Federal Regulations, 40 CFR Part 280
3. U.S. EPA, Frequent Questions About Underground Storage Tanks
4. U.S. EPA, UST Technical Compendium — Applicability, Definitions and Notification
5. U.S. EPA, UST Performance Measures
6. International Code Council, 2021 International Fire Code, Chapter 57
7. Connecticut DEEP, Residential Home Heating Oil Tanks
8. Connecticut DEEP, Residential Home Heating Oil Tanks FAQ
9. Connecticut DEEP, Residential Underground Home Heating Oil Tank Releases
10. Connecticut Department of Consumer Protection, Removal Requirements for Underground Storage Tanks
11. Connecticut Department of Consumer Protection, Residential Property Condition Report
12. Connecticut General Statutes, Chapter 400
13. Connecticut Office of Legislative Research, County Government Report 2015-R-0274
14. City of Hartford, Storage Tank Removal Inspection Application
15. City of Hartford, Homeowner's Guide to Permitting
16. New Hampshire General Court, HB 1620 Final Text, Chapter 122
17. New Hampshire DES, Heating Oil and SafeTank
18. Maryland Department of the Environment, Residential Heating Oil
19. Maryland Department of the Environment, Residential/Farm UST Closure Fact Sheet
20. Maryland COMAR 26.10.01.13
21. New Jersey DEP, Unregulated Heating Oil Tank Program
22. New Jersey DEP, UHOT Funding Fact Sheet
23. New Jersey DEP, N.J.A.C. 7:26F Readoption Effective June 24, 2025
24. Ohio Admin. Code 1301:7-7-57, effective November 20, 2025
25. Wisconsin DATCP, Residential Underground Storage Tanks Fact Sheet
26. Oregon DEQ, Heating Oil Tanks
27. Washington PLIA, Heating Oil Tank Decommissioning
28. Maine DEP, Chapter 691 — Rule for Underground Oil Storage Facilities
29. Michigan LARA, Home Heating Oil Tank FAQ
30. Minnesota MPCA, Heating Oil Tanks
31. Rhode Island, 250-RICR-140-25-1
32. Vermont Statutes, Title 10, Chapter 59
33. Virginia DEQ, Home Heating Oil Tanks