Bilge Water Disposal

Bilge water collects in the lowest part of the engine room. It mixes oil, fuel, water, detergents, and machinery wash-down. 

MARPOL Annex I sets strict limits on what a ship can discharge at sea, generally below 15 ppm oil content after treatment. Anything that fails the test goes ashore. 

Bilge water disposal service providers receive untreated or partially treated bilge water at port facilities and process it under permit. RecordsMarine's directory groups vetted operators by port. Superintendents can confirm reception capacity before the ship arrives.

When the Ship Needs Disposal Services

A few situations force the call:

• The onboard oily water separator (OWS) has broken down
• The bilge holding tank is full, and the next port stop is hours away
• Cargo or fuel oil contamination has pushed bilge water past treatment limits
• The vessel runs in a special area where overboard discharge is banned
• A pre-drydock clean has produced large volumes of dirty water
• Class survey requires a bilge tank inspection.

Bilge water disposal services scale to the volume. A routine port call moves a few cubic metres. A drydock pre-clean can move hundreds of tonnes.

How the Service Runs

The disposal company sends a road tanker, a barge, or a fixed reception line to the berth. A meter records the volume as it leaves the ship. The chief engineer signs the receipt. The entry goes into the Oil Record Book the same day. The shore facility then treats the waste, with further separation, biological treatment, or incineration, depending on the contract. A certificate of disposal follows for the ship's records and for any port state inspection.

Trustworthy bilge water disposal service providers handle transfer, paperwork, and certification within the same port call.

Documentation and Compliance

Every transfer goes into Oil Record Book Part I. Port State Control inspectors cross-check these entries against the ship's pumping records. The disposal certificate must name the receiving facility, the volume transferred, and the licence under which the waste was processed. 

A vague or missing certificate can lead to detention. Operators registered under MARPOL Annex I and the EU Port Reception Facilities Directive carry recognised paperwork across major trading regions.

How to Choose the Right Operator

Bilge transfer goes wrong fast when the operator is unprepared. Tankers turn up late. Reception capacity runs short. Paperwork lacks the right permit numbers. Each problem either delays the ship or leaves a compliance gap. 

Before approval of any new bilge water disposal services provider, check:

• Licensed reception under MARPOL Annex I
• Capacity that matches your ship's bilge volume
• Coordination with the port authority for berth-side access
• Documentation in English, accepted by your flag state
• Realistic transfer windows aligned with port stay
• Itemised pricing per cubic metre, with no hidden surcharges.

Costs to Expect

Disposal pricing varies widely by port. Typical 2026 ranges run from €15 to €60 per cubic metre. Surcharges apply for heavily contaminated water or out-of-hours service.

Drydock-volume disposals attract bulk pricing. Some ports include basic bilge water reception in port dues. Others charge separately. Confirm the basis at the quote stage rather than after delivery.

Frequently Asked Questions

Can a ship discharge bilge water at sea instead of paying for disposal?

Only after treatment through a working oily water separator, and only outside special areas. The discharge must measure below 15 ppm and go into the Oil Record Book. Untreated discharge is a criminal offence under MARPOL.

How fast can the service be arranged?

A 24- to 48-hour notice secures most port slots. Same-day service is sometimes possible at major hubs, usually at a premium. The ship's agent gets results faster than direct contact in most ports.

Is sludge disposal different from bilge water disposal?

Yes. Sludge is heavily oil-contaminated waste from the OWS and purifier discharges. It goes through dedicated sludge reception facilities under MARPOL Annex I. Many operators handle both, but the paperwork and pricing differ.

Find Bilge Water Disposal Services Near You

The directory below lists licensed operators by port. Confirm reception capacity and required notice period before the ship arrives. A late booking often misses the port stay window.