Glossary N

The Environmental Glossary. Letter N +++ 'Nutrient', 'Nitrogen fixation', 'Natural gas'
A Non-Point Source Management Program is Under the Non-Point Source Management Program,
- Non-Point Source Pollution : A Non-Point Source Pollution is Pollution that occurs when rainfall, snowmelt, or Irrigation runs over land or through the ground, picks up pollutants, and deposits them into rivers,
Non-Productive Sow Days are Days a sow is neither Lactating or gestating.
A Non-Return Dip Cup is a dip cup that does not allow the liquid to reenter and potentially contaminate the storage container.
- Non-Transient, Non-Community Water System : A Non-Transient, Non-Community Water System is a water system which supplies water to 25 or more of the same
A Nonattainment is any area that does not meet (or that contributes to Ambient Air quality in a nearby area that does not meet) the national primary or secondary Ambient Air quality standard for the pollutant.
A Nonattainment Area is a region in which the level of a Criteria Air Pollutant is higher than allowed by the federal NAAQS.
A Nonbiodegradable is Substance that cannot be broken down in the environment by natural processess. See biodegradable.
Nonlinearities are Occur when changes in one variable cause a more than proportionate Impact on another variable.
Nonliving. compare biotic