Typical stormwater pollutants, summary of sources and potential concerns for harvest and use
Link to this table

Pollutant Sources Potential Concerns
Nutrients
  • Nitrogen
  • Phosphorus
  • atmospheric deposition, sediment (adsorbed nutrients)
  • organic debris
  • fertilizer runoff
  • animal feces
  • combined sewer overflows
  • Support growth of algae or unwanted microbial growth on the water surface in the storage unit.
Organic Matter
  • Organic debris (leaves, flowers, pollen, twigs, insect carcasses, etc.)
  • Decomposition in tank can result in low dissolved oxygen levels, nuisance odors, and release of pollutants from sediments
Suspended Sediment
  • paved surfaces
  • areas of bare soil/poor vegetative cover
  • construction activity
  • stockpiles
  • May clog pump intake or distribution
  • Increases maintenance of storage
Chlorides
  • De-icing chemicals
  • water softening chemicals
  • Corrosive to metal pipes/plumbing
  • Plant toxicity (irrigation)
Pathogens
  • animal feces (including bird feces on rooftops)
  • insects/vector organisms
  • drainage area activities such as waste management
  • sewage overflows or leaking sewers
  • Human health risk
Metals
  • Vehicle exhaust
  • Roofing materials
  • Drainage area activities that are potential sources of metals (e.g. vehicle fueling or repair)
  • Plant toxicity
Organic Chemicals
  • Pesticides/herbicides
  • Industrial chemicals and solvents
  • Petroleum-derived chemicals
  • Drainage area activities that are potential sources of organics (e.g. herbicide/ pesticide use or waste management)
  • Plant toxicity
  • Human health risk
  • Animal health risk

This page was last edited on 16 April 2020, at 18:10.

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