Toxic Substance: A chemical or mixture that may present an unreasonable risk of injury to health or the environment.
Toxic Waste: A waste that can produce injury if inhaled, swallowed, or absorbed through the skin.
Toxic substance: any chemical product applied on the surface of or incorporated into any structural or decorative material, or any other chemical, biologic, or physical agent in the home environment or its immediate surroundings, ...
Toxic Substance (or toxicant)
A substance that can cause death, disease, behavioural abnormalities, cancer, genetic mutations, physiological or reproductive malfunctions, or physical deformities in any organism or its offspring.
toxic substance
chemical etiologic agent
poison
toxicant
toxic chemical
toxic material
Material causing injury to living organisms as a result of physicochemical interactions.
Toxic Substance (Toxicant): harmful to plant or animal life, either immediately (acute toxicity) or over a long time period (chronic toxicity).
Toxic Substances Control Act (TSCA)
A federal law of 1976 to regulate chemical substances or mixtures that may present an unreasonable risk of injury to health or the environment.
Toxic substances (or toxin) are those chemicals or other substances that can cause damage to the health of living organisms.
toxic substance : A chemical or mixture that can cause illness, death, disease, or birth defects. The quantities and exposures necessary to cause these effects can vary widely.
Toxic substances contain contaminants that can cause sickness or death for living organisms. Toxic is also a classification for hazardous waste.
Toxic Substance Control Act Interagency Testing Committee
TLV
Threshold Limit Value ...
Toxicant/toxic substance
A human-made chemical or mixture that presents a risk of death, disease, injury or birth defects in organisms that ingest or absorb them.(1), (5) ...
Agency for Toxic Substances and Disease Registry (ATSDR)-An agency of the Department of Health and Human Services, the Agency for Toxic Substances and Disease Registry is responsible for chemical safety.
The Agency for Toxic Substances and Disease Registry (ATSDR) is a federal public health agency with headquarters in Atlanta, Georgia, and 10 regional offices in the United States.
Acute Exposure A single exposure via oral, dermal or inhalation to a toxic substance that may result in harm or death.
Agency for Toxic Substances and Disease Registry (ATSDR) ATSDR is part of the U.S. Department of Health and Human Services.
LD L0- The lowest dosage of a toxic substance that kills test organisms.
LDC- London Dumping Convention
LDCRS- Leachate Detection, Collection, and Removal System
LDD- Light-Duty Diesel
LDDT- Light-Duty Diesel Truck
LDDV- Light-Duty Diesel Vehicle ...
To most people not professionally involved in water quality issues, water is either drinkable (technically potable) or contains potentially harmful or toxic substances.
A single exposure to a toxic substance which may result in severe biological harm or death. Acute exposures are usually characterized as lasting no longer than a day, as compared to longer, continuing exposure over a period of time.
Acute Toxicity ...
These are forms of diffuse pollution caused by sediment, nutrients, organic and toxic substances originating from land use activities which are carried to lakes and streams by surface runoff.
Acute Exposure: A single exposure to a toxic substance which may result in severe biological harm or death.
Contamination - Introduction into water, air and soil of microorganisms, chemicals, toxic substances, wastes or wastewater in a concentration that makes the medium unfit for its next intended use.
background level In toxic substances monitoring, the average presence of a substance in the environment, originally referring to naturally occurring phenomena.
Dose Response
How an organism's response to a toxic substance changes as its overall exposure to the substance changes. For example, a small dose of carbon monoxide may cause drowsiness; a large dose can be fatal. ...
PCBs
polychlorinated biphenyls; very persistent, toxic substances, stored in fatty tissue; previously widely used as fire-resistant dielectric fluids in transformers and capacitors; now prohibited ...
It is not only large quantities of toxic substances that contaminate land. Contamination can occur even when small quantities of waste are allowed to seep into the soil over a long period of time.
Multimedia Exposure: Exposure to a toxic substance from multiple pathways such as air, water, soil, food, and breast milk.
Mutagenic: The ability of a chemical or physical agent to produce heritable changes in the DNA of living cells.
N ...
Nonpoint Source (NPS) Pollution: Forms of pollution caused by sediment, organic and inorganic chemicals, and biological, radiological, and other toxic substances originating from land use activities, ...
The science of poisons and toxic substances occurring in the environment and their effects.
Definition source ...
Hardness: The concentration of calcium or magnesium in water; affects the availability of nutrients and toxic substances to stream organisms.
Headwaters: Small streams and creeks at the uppermost end of a river system.
Toxicogenomics: The collection, interpretation, and storage of information about gene and protein activity in order to identify toxic substances in the environment, ...
Bioaccumulation (bioconcentation): A term used to describe a process that occurs when levels of toxic substances increase in an organism over time, due to continued exposure.
According to the federal Agency for Toxic Substances and Disease Registry, the substance is not considered a pollutant per se, as it separates into relatively harmless component elements once released into water or moist soil.
FLY ASH A fine residue, left after trash is burned in an incinerator, which can be carried in the air. It can contain harmful or toxic substances such as dioxins, lead and mercury.
FR Freon.
Woodburning Pollution - air pollution caused by emissions of particulate matter, carbon monoxide, and odorous and toxic substances from woodburning stoves and fireplaces
X
Y
Z ...
Chronic exposure to PCBs is believed to cause liver damage. It also is known to bioaccumulate in fatty tissues. PCB use and sale was banned in 1979 with the passage of the Toxic Substances Control Act.
the introduction of toxic substances into an ecosystem.
pollution, ecological.
ppm parts per million, a measure of concentration, usually of some toxic substance. Laws are often framed say that effluents are permitted to contain some maximum amount of various pollutants each measured in ppm.
 See also: Toxic, Water, Environment, Waste, Air
  
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