EPA VIDA Rule: What It Means for Deck Hydraulic Fluids

This answer covers US federal law for vessels 79 feet (24 m) and longer in US waters and the contiguous zone, and only the lubricant duty in 40 CFR 139.6(e). It does not cover recreational or Armed Forces vessels, and it covers vessels under 79 feet and fishing vessels for ballast water only. Stern tube and propulsion lubricants, state rules and EU or IMO regimes are outside it.

What is changing under VIDA, and when?

Under the Vessel Incidental Discharge Act (VIDA), the EAL duty for deck hydraulic fluids is moving from the 2013 Vessel General Permit (VGP), a Clean Water Act permit, to EPA's national standards in 40 CFR part 139, which apply once the US Coast Guard issues implementing rules (EPA, 2024). The duty itself carries over: EPA's final rule "retains the caveat from the VGP that EALs must be used in oil-to-sea interfaces except when 'technically infeasible'" (EPA, 2024). What changes is the legal home, a written definition of an oil-to-sea interface that names above-water deck equipment, and the explicit addition of hydraulic fluid to the EAL definition. The 2024 rule also drops the VGP's list of accepted ecolabels, such as Blue Angel and the European Ecolabel, so a label alone will not show that a fluid meets the 40 CFR 139.2 definitions once the standards apply, although EPA expects all or most of those labeling programs to meet the new criteria (EPA, 2024).

The timeline below shows which federal action set each date that matters to a deck hydraulic system:

The row that matters most is the last one: as of 2026-10-14, the Coast Guard had published no VIDA implementing rule, so the 2013 VGP EAL requirement remains the one a vessel operator is held to.

Which deck hydraulic systems count as oil-to-sea interfaces?

A deck hydraulic system counts as an oil-to-sea interface under VIDA when its design lets oil escape directly into the surrounding water, which includes deck equipment that extends overboard or is mounted to the outside of the hull (40 CFR 139.2, 2026). The definition reads: "Oil-to-sea interface means any seal or surface on shipboard equipment where the design is such that oil or oily mixtures can escape directly into surrounding waters" (40 CFR 139.2, 2026). Its second sentence adds that such interfaces "are found on equipment that is subject to submersion as well as equipment above the surface line that extends overboard or is mounted to the exterior of the hull."

EPA's preamble names the deck machinery it has in mind: hose handling cranes, hydraulic provision handling cranes, hydraulic cranes and hydraulic stern ramps, plus hull-mounted equipment such as accommodation ladders (EPA, 2024). EPA notes that discharges can occur when booms or jibs, trolleys, cables, hoist gear or derrick arms are in use over the side (EPA, 2024).

EPA added the deck wording after comments, and said it matches its regulation of "those portions of vessel deck equipment from which lubricant or hydraulic fluid losses cannot otherwise be managed onboard the vessel" (EPA, 2024). The test is therefore the leak path, not the equipment name. A deck winch whose leaks fall into a drip pan is likely outside the definition; the same winch is likely inside it if its wire and greased parts run over the side.

When do the VIDA standards become enforceable?

The VIDA standards for deck hydraulic fluids become enforceable on the date the Coast Guard's implementing regulations are final, effective and enforceable, not on the November 8, 2024 effective date of EPA's rule (EPA, 2024). EPA's coverage section states: "The standards in this part are effective beginning on the date upon which regulations promulgated by the Secretary governing the design, construction, testing, approval, installation, and use of marine pollution control devices as necessary to ensure compliance with the standards are final, effective, and enforceable" (40 CFR 139.1, 2026).

The statute sets the Coast Guard's schedule. It must issue those regulations "as soon as practicable, but not later than 2 years" after EPA promulgates a standard (33 U.S.C. 1322, 2024). EPA describes this as within two years after EPA publishes the federal standards (EPA, 2024), which points to October 9, 2026. As of 2026-10-14, the Federal Register lists no Coast Guard document matching "VIDA" or "incidental discharge" published since October 1, 2024 (Federal Register, 2026). With no proposed or final Coast Guard VIDA rule, no enforcement date for 40 CFR 139.6(e) can be given.

The statute also sets a floor for the coming Coast Guard rules: they may not be less stringent than VGP Parts 3, 4 and 5, which cover corrective actions, inspections, monitoring, reporting, recordkeeping and training (33 U.S.C. 1322, 2024). An operator who keeps VGP-grade EAL records now is building the record the Coast Guard rules are required to match.

Does the 2013 VGP still apply until the VIDA Coast Guard rules are final?

Yes, the 2013 VGP still applies to deck hydraulic fluids until the VIDA Coast Guard rules are final, effective and enforceable (EPA, 2025). The statute states that "all provisions of the Vessel General Permit shall remain in force and effect, and shall not be modified, until the applicable date" on which the Coast Guard requirements for every covered discharge are final, effective and enforceable (33 U.S.C. 1322, 2024).

EPA's interim requirements split vessels by size. Non-recreational, non-Armed Forces vessels 79 feet and longer, except fishing vessels, follow the full 2013 VGP, the Coast Guard ballast water rules, and any applicable state and local requirements (EPA, 2025). Vessels under 79 feet and fishing vessels of any size follow the VGP for ballast water only (EPA, 2025).

For a vessel under the full VGP, Part 2.2.9 sets the lubricant duty: "All vessels must use an EAL in all oil to sea interfaces, unless technically infeasible" (EPA, VGP Part 2.2.9, 2013). A vessel that cannot use an EAL must record why and report the non-EAL use to EPA in its Annual Report (EPA, VGP Part 2.2.9, 2013). The VGP also asks operators to keep technical data sheets for every EAL used in oil-to-sea interfaces and note any ecolabel registration (EPA, VGP Part 4.2, 2013). For deck machinery that does not reach the water, the VGP deck washdown section says "EPA strongly encourages the use of environmentally acceptable lubricants in all above deck equipment" (EPA, VGP Part 2.2.1, 2013).

Which deck equipment and hydraulic fluids does the VIDA EAL rule affect?

The VIDA EAL rule affects every hydraulic fluid, oil and grease used in deck equipment whose design lets lubricant reach the water directly, and EPA states that any hydraulic fluid containing oils or greases in such equipment requires an EAL unless technically infeasible (EPA, 2024). The table below sorts typical deck equipment by whether it falls under 40 CFR 139.6(e):

The key row is the over-the-side crane: its hydraulic fluid and the grease on its hoist gear are covered whenever the boom works beyond the hull.

Greases are held to a different biodegradability bar than oils. For greases, at least 75 percent of the formulation by weight must biodegrade within 28 days, against 90 percent for oils (40 CFR 139.2, 2026). A crane with an EAL hydraulic fluid can still be out of line if its wire rope or slewing gear grease is conventional, so the inventory should list each lubricant on the machine, not only the hydraulic tank.

What does switching to an EAL change in a deck hydraulic system?

Switching a deck hydraulic system to an EAL changes the base fluid, and with it seal, paint, filter and mixing behavior, so the conversion is a qualification task rather than a top-up (US EPA, 2011). ISO 15380:2023 specifies requirements for environmentally acceptable hydraulic fluids in four categories: HETG (triglycerides), HEPG (polyglycols), HEES (synthetic esters) and HEPR (polyalphaolefins and other synthetic hydrocarbons) (ISO 15380:2023). An ISO 15380 category alone does not prove the three 40 CFR 139.2 criteria; ask the supplier for data against each.

Synthetic esters are compatible with mineral oil, which reduces changeover costs, but are incompatible with some paints, finishes and seal materials, and their cleaning action on mineral oil deposits can clog filters after changeover (US EPA, 2011). Polyalkylene glycols are incompatible with mineral oils and most paints, varnishes and seals, giving them the highest changeover costs of any EAL class (US EPA, 2011). Vegetable oil lubricants tolerate some mineral oil residue but need more frequent filter service (US EPA, 2011).

Danfoss's fluid requirements list HEES, HETG and HEPG fluids with an added condition: they must also meet ISO 15380 Annex B, a shear stability and yellow metal test (Danfoss 520L0463, 2016). Bosch Rexroth's mineral-oil fluid data sheet treats a fluid containing more than 2 percent of another fluid as a mixture, recommends a written performance guarantee from the new fluid's supplier, and refers changeovers between fluid classifications to VDMA 24314, VDMA 24569 and ISO 15380 Annex A (Bosch Rexroth RE 90220/05.12, edition read).

What counts as technically infeasible for an EAL under VIDA?

Under VIDA, technically infeasible is not yet defined: 40 CFR part 139 uses the term without defining it, and EPA left the test to the Coast Guard (40 CFR 139.6, 2026). EPA's preamble states: "Determinations of technical infeasibility regarding the use of an EAL pertain to implementation and therefore would fall under the USCG's implementing regulations established under CWA section 312(p)(5)" (EPA, 2024). The one example EPA gives is existing equipment for which no compatible products are currently available (EPA, 2024).

Until those rules exist, the working definition is the one in the 2013 VGP. For EAL purposes, technically infeasible means one of four conditions (EPA, VGP Part 2.2.9, 2013):

1. No EAL product is approved for the application that meets the equipment manufacturer's specifications.

2. A product that comes pre-lubricated, such as wire rope, has no available alternative made with an EAL.

3. No product meeting the manufacturer's specifications is available in any port the vessel calls at.

4. Changeover to an EAL must wait until the vessel's next drydocking.

Each condition is narrow. The first needs the equipment maker's approval list, not a general view that EALs perform worse. The fourth defers the duty to a dated event rather than waiving it, so a deck crane running mineral oil under this condition should show a changeover plan for the next drydock. In every case the VGP requires the reason in the vessel's records and the non-EAL use in the Annual Report (EPA, VGP Part 2.2.9, 2013).

What should deck equipment operators do now under VIDA?

Deck equipment operators should comply with the VGP EAL duty now and build records the VIDA Coast Guard rules can be checked against, because the statute requires those rules to be at least as strict as VGP recordkeeping (33 U.S.C. 1322, 2024). The action table below assigns each step to a role and a deadline:

The most urgent row is the inventory, because the VGP EAL requirement applies today and VIDA did not pause it (EPA, 2025). The inventory also fixes scope for every later step: a crane that never works over the side may need no EAL, while a hull-mounted ladder or stern ramp does, and the list lets the superintendent order fluids and plan drydock work once instead of machine by machine.

Disposal matters at every changeover: Section 13 of each fluid's SDS gives its disposal considerations (OSHA, 29 CFR 1910.1200 App D), the VGP bars oil discharges in quantities that may be harmful as defined in 40 CFR Part 110 (EPA, VGP Part 2.2.9, 2013), and 40 CFR 139.6(b) will prohibit any discharge of used or spent oil once the VIDA standards apply (40 CFR 139.6, 2026).

What is still open in the VIDA rule for deck hydraulic fluids?

Three points about deck hydraulic fluids remain open in the VIDA rule as of 2026-10-14: the Coast Guard rule itself, the infeasibility test, and the edge of the deck equipment definition.

First, the date and content of the Coast Guard implementing rule are unknown. The statutory deadline of two years after EPA publication passed on October 9, 2026 with no Coast Guard VIDA document in the Federal Register (Federal Register, 2026). When the rule is final and enforceable, the VGP and certain existing federal, state and local vessel discharge requirements are repealed (EPA, 2024), so state requirements that apply today under the interim regime (EPA, 2025) may change on that date.

Second, the infeasibility test will be written by the Coast Guard (EPA, 2024). Whether it keeps the four VGP conditions, including deferral to the next drydocking, is not known.

Third, EPA tied deck coverage to equipment that extends overboard, and noted that losses from idle deck equipment are typically captured in deck washdown (EPA, 2024). How the Coast Guard will treat equipment that works over the side only now and then is not settled.

The EAL definition itself is stable: EPA kept the VGP's 28-day biodegradability window rather than the 10-day window used in the European Ecolabel (EPA, 2024).

Lubinpla works this kind of question from a fleet's own technical data sheets, SDS and certificates and returns one cited document for review.