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Maryland Clean Boating Lesson Plan

Learn about the environmental concerns and legal basics of vessel sewage in Maryland, including the harmful effects on human health and water quality. Discover the types of Marine Sanitation Devices (MSDs) and the importance of holding tanks and pump-outs.

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Maryland Clean Boating Lesson Plan

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  1. Maryland Clean Boating Lesson Plan Section 2 VESSEL SEWAGE www.dnr.maryland.gov/boating

  2. Vessel Sewage: Environmental Concerns • Harmful to human health • Diseases may be passed to swimmers or to people who eat contaminated shellfish • Harmful to water quality • Excess nutrients cause algal blooms • Bacteria that decompose algae reduce dissolved oxygen www.dnr.maryland.gov/boating

  3. Vessel Sewage: Legal Basics • Discharging raw sewage is against State and Federal laws • All vessels with installed toilets must have a Marine Sanitation Device (MSD), There are 3 types of MSDs. • Types I and II treat and release the waste. • Type III is a holding tank. • Portable toilets: Use a pumpout station to empty www.dnr.maryland.gov/boating

  4. Sewage: Marine Sanitation Devices Type I and II MSDs • Establish a regular maintenance schedule • Do not discharge in a marina, swimming area, over an oyster bar or in a poorly flushed area • Do not discharge in federally designated “No Discharge Zones” Holding Tanks (Type III) • Use enzyme-based products to control odor • Avoid quaternary ammonium compounds (QAC) and formaldehyde www.dnr.maryland.gov/boating

  5. Vessel SewageNo Discharge Zones • 2 NDZs in Maryland: Herring Bay and the Northern Coastal Bays. • EPA designates No Discharge Zones (NDZ) upon application by the State. • In a NDZ boaters may not use Type I or II MSDs (that treat and release waste). • Must use holding tanks and pump-out. www.dnr.maryland.gov/boating

  6. Vessel SewageResources • For more information visit DNR’s website www.dnr.maryland.gov/boating/pumpout • www.boatus.com/foundation • Know the laws and how they apply to you. www.dnr.maryland.gov/boating

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