What is the Limit?
The Federal limit set by the EPA is 15 parts of oil per million parts of liquid discharged from your boat, which means that you would need to have more than 500 gallons of water in your bilge (picture this as ten 50 gallon drums) to legally remove one fluid ounce of oil without breaking the law.
Each state is allowed to set lower requirements.
Allows only 5 ppm (or about 1,500 gallons of water per ounce of oil)
CALIFORNIA & NEW JERSEY
Permit zero ppm