When a discharge triggers a federal duty
If you operate a recreational boat in U.S. waters, your reporting duty comes from federal law, and state rules can add to it. Under the regulations implementing section 311 of the Clean Water Act, the person in charge of a vessel must notify the National Response Center (NRC) as soon as they have knowledge of a discharge of oil, and immediately after that. The duty starts with knowing about the discharge, not with knowing how large it is. You do not have to confirm the amount or the source before calling.
The person in charge is the one who has command of the boat when the discharge happens. On a small boat that is usually the owner or skipper, but anyone at the helm or in charge of the vessel at that moment carries the same obligation.
What counts as a reportable oil discharge
Federal law defines harm by effect rather than by volume. Under 40 CFR 110.3, discharges that cause “a film or sheen upon or discoloration of the surface of the water or adjoining shorelines” are harmful, as are discharges that deposit sludge or emulsion beneath the surface or on nearby shorelines. A rainbow sheen spreading from a bilge leak, a drip at a fuel dock, or oily water pumped overboard can all qualify, even when the amount looks trivial and the sheen fades within minutes.
Oil in this context includes fuel, engine lubricating oil, hydraulic fluid and oily bilge water. If you see any sheen form on the water after a fuel, oil or bilge event, treat it as reportable and make the call.
How to make the report
Call the National Response Center toll-free at 1-800-424-8802, the number EPA gives for reporting oil discharges. Make this call first. If you cannot reach the NRC, the regulation allows a report to a predesignated On-Scene Coordinator from the Coast Guard or EPA, who must relay it promptly to the NRC. EPA also names its regional offices and the Coast Guard Marine Safety Office for the area where the incident occurred as alternative contacts.
Have the following information ready before you dial, or write it down as you talk. Dispatchers commonly ask for the location, including the nearest landmark or GPS position, the time you first saw the discharge, the source and what is still leaking, the substance, and your best estimate of the quantity. An estimate is acceptable, and you should say clearly what you know and what you do not know. Record the time of the call, the name of the person you spoke with and any reference number they give you. Dispatch may call back with follow-up questions, so keep your phone available.
Immediate safety during a spill
People come first, then containment. Fuel vapor is the greatest immediate hazard on a small boat. If it is safe to do so, shut off the engine and the fuel supply, then ventilate the space by opening hatches and running the blower. Check the bilge for vapor before starting any engine or switching on electrical equipment that could spark. Do not enter an enclosed space that may contain vapor until it has been aired out.
Stop the source only if you can do so without putting yourself at risk, for example by closing a valve, tightening a fitting or plugging a hole. Contain the oil with absorbent pads or a boom if you have them, and place used pads and rags in a sealed container. Never hose oil off the deck or wash it overboard, and do not apply dispersants or detergents on the water unless the responding agency instructs you to do so. If the spill is larger than you can handle, or if the boat is in difficulty, use your radio’s distress procedure as soon as possible.
Do not restart the engine or resume normal operation until the leak is repaired and the bilge has been cleaned and ventilated. Oily rags, pads and oily bilge water are oily waste. They belong in a container for an approved reception facility, not in household trash and not overboard.
Garbage and plastics: what the federal rules require
Federal garbage rules apply to recreational vessels as well as commercial ships. The regulations in 33 CFR 151.51 expressly include recreational vessels, with separate thresholds for different obligations. Three points matter most for a typical boater.
First, the placard. Under 33 CFR 151.51(e)(1), a manned U.S. vessel of 26 feet or more in length must display a placard. The person in charge must make sure it is displayed, and it must be durable, legible and at least 8 inches wide by 5 inches high. It must notify readers of the operating requirements for garbage discharge and state that the discharge of all forms of plastic into all waters is prohibited.
Second, plastics. No person on board may discharge plastic into the sea or into U.S. navigable waters. The rule covers items such as synthetic ropes, synthetic fishing nets and plastic garbage bags, and all garbage containing plastic must be landed ashore or incinerated. Store plastic waste on board until you reach a shore disposal point.
Third, food waste and other garbage. Under 33 CFR 151.71, food waste may be discharged only while the vessel is under way and not less than 12 nautical miles from the nearest land. Other garbage is not allowed overboard unless the section expressly permits it, so the default is to keep it on board and dispose of it ashore.
If your boat is 40 feet or longer and is either engaged in commerce or equipped with a galley and berthing, a written garbage management plan is also required under 33 CFR 151.51(d)(1). State rules may be stricter than the federal ones for some waters, so check the requirements for the waters you plan to use.
Sewage and no-discharge zones
Sewage follows a separate set of rules. EPA’s recreational boater guide on vessel sewage, updated on June 9, 2026, covers marine sanitation devices, no-discharge zones and the use of pumpout facilities. Under 40 CFR 140.4, a state may apply to EPA to completely prohibit the discharge of any sewage, treated or not, from all vessels in some or all of its waters. Some federal waters are already closed in this way, including the Boundary Waters Canoe Area and the Florida Keys National Marine Sanctuary waters.
Before a trip, find out whether the waters you plan to use are a no-discharge zone and where the pumpout stations are. If your boat has a marine sanitation device, follow the device manufacturer’s instructions and any state requirements for keeping it inoperable or secured while you are in a no-discharge zone. If your holding tank is full, use a pumpout facility rather than discharging.
Before you leave the dock
Federal law turns on knowledge and effect. Any sheen on the water is a reportable event, and you should call the NRC right away. Plastic and most garbage stay on board, and sewage handling depends on where you are. Checking these three areas before each trip is the most reliable way to avoid an unreported discharge.
Frequently asked questions
Do I also have to report a spill to my state?
Many states have their own spill reporting rules in addition to the federal duty. Check with your state environmental agency or boating agency for the requirements that apply to the waters you use.
Can I be penalized for failing to report a discharge?
Yes. Violations of the Clean Water Act and its implementing rules can bring civil and criminal penalties. The amounts are set by statute and adjusted over time, so consult the current official text rather than older guides.
What should I do if the fuel spill happened at a marina fuel dock?
Tell the dock staff immediately so they can stop the flow and follow the marina’s own procedures. You still have the federal duty to call the National Response Center yourself, and you should give the dock staff’s account of the event as part of your report.
