| A | B |
|---|
| atmospheric deposition | Sedimentation of solids, liquids or gaseous materials from the air. |
| BAT Best available, economically achievable technology | Best Pollution control available |
| best practicable control technology BAT | best technology for pooution control available at reasonable cost. |
| biochemical oxygen demand BOD | Standard test for measuring the amount of dissolved oxygen utilized by aquatic microorganisms. |
| coliform bacteria | Bacteria that live in the intestines of humans and other animals. Used to measure presence of feces in water or soil |
| cultural eutrophication | An increase in biological productivity and ecosystem succession caused by human activities |
| dissolved oxygen DO | Amount of oxygen dissolved in a given volume of water at a given temperature and atmospheric pressure (ppm) |
| effluent sewerage | A low cost alternative sewage treatment for cities in poor countries that combines some features of septic systems and centralized municipal treatment systems. |
| eutrophic | Rivers and lakes rich in organisms and organic material |
| nonpoint sources | Scattered, diffuse sources of pollutants such as runoff from farm fields, golf courses, construction sites, ect. |
| oligotrophic | condition of rivers and lakes that have clear water and low biological productivity; ususally clear and cold |
| oxygen sag | Oxygen decline downstream from a pollution source that introduces materials with high biological oxygen demands. |
| point sources | Specific locations of highly concentrated pollution discharge. |
| primary treatment | Process that removes solids form sewage before it is discharged or treated further. |
| red tide | A bloom of dinoflagellates that emitt toxins that can poison marine life. |
| secondary treatment | bacterial decomposition of suspended particulates and dissolved organic compounds that remain after primary sewage treatment |
| tertiary treatment | Removal of inorganic minerals and plant nutrients after primaryand secondary treatment of sewage. |
| thermal plume | A plume of hot water discharged into a stream or lake by a heat source (power plant) |
| total maxiumu daily loads TMDL | Amouint of particular pollutant that a water body can receive from both point and non-point sources and still meet water quality standards. |
