### condition | impurity:

Contamination
* Is a small amount of light spuriously transmitted from within a rejection band.
* affects adult survival
  - birds
  - safety
* also occurs when companies overuse fertilizers, pesticides, and herbicides.
* can also occur where food is being made
  - double the amount of manganese in the food, blood, or tissue sample
  - occur at every stage of the food chain
* can occur if bacteria in flood water come in contact with food
  - filth and disease bacteria in flood waters cover, drip or seep into food
* can occur naturally or by the hands of humans
  - come from pollution
  - result from substances escaping into groundwater, surface water, or the air
* causes damage
  - health problems
* comes from other sources
* consists of soil contaminated with metals and petroleum hydrocarbons.
* is an impurity
  - any substance placed into or onto evidence by a responsible party
  - anything other than pure water
  - soiling
  - the unintended presence of harmful substances or micro-organisms in food
  - through ingestion, inhaling, and absorption through the skin
  - usually more serious in a drinking water supply than in water for other uses
* major contributor to exposure effects on metal surfaces
  - element in the marketing of products
* occurs from fungal spores present in all aerial environment, indoors and outdoors.
* occurs when cattle are confined to feed lots to be fattened for slaughter
  - commercial divers clean boat hulls painted with soft paints in the water
  - there is more nitrate in the soil than plants can absorb
* poses problems
  - serious problems
* presents problems.
* radioactive material in an undesirable location.
* recurrent problem with paramecia cultures.
* reduces quality.
* represents problems.
* results from damage
  - water damage
  - in diseases
* starts through transmission of the bacteria via the fecal matter.
* takes place through fecal contaminated food and hands.

### condition | impurity | contamination:

Bacterial contamination
* can cause food borne illness, including life-threatening botulism.
* can cause foodborne illness, including life-threatening botulism
  - such as botulism and salmonella poisoning
  - spread diseases to humans and livestock
* falls under the category of pathogens.

Chemical contamination
* appears initially and most intensely at the sediment-water interface.
* impacts different media - air, water and land.
* is of concern in many coastal areas
  - possible along with the risk of damaging work and property

Environmental contamination
* is found in surface and subsurface soils.
* plays a major role in the transmission of hookworm.

Fecal contamination
* common cause of gastrointestinal illness.
* is one way the organism is spread to raw agricultural products
  - very damaging because of bioaccumulation
* occurs when people defecate outdoors or use human feces as fertilizer.

Food contamination
* Most food contamination is caused by organisms that occur naturally in foods.
* brings every form of plague.
* can bring more than a passing stomachache
  - occur at any stage during food production, shipping, storage and preparation
* interferes with recycling.
* is most risky in any raw foods.

Ionic contamination
* becomes adsorbed on soil particles following contact.
* can cause corrosion on electronic devices.

Lead contamination
* Most lead contamination is from corrosion by-products.
* can poison adults and children
  - spread with groundwater and surface water, by erosion, or with airborne dust
* is another good reason for pregnant women to refrain from drinking wine.
* major concern today, especially when small children are involved.

Mercury contamination
* can affect the human central nervous system, kidneys and liver.
* is widespread.
* problem at thousands of industrial sites.
* significant public health and environmental problem.
* worldwide problem that comes from many sources