Potable Water
The Great lakes
Chemicals and sludge and sewage were dumped in.
Country Health Departments
Sewage in public places such as lakes or ponds monitors.
1986- 1988
amendment were made to the safe drinking water act regarding lead.
Personal preferences
appearance, odor, hardness, taste. These do not ell us if water is safe to drink.
Filters
can be used at home or at a drinking water plant. do not work for bacteria and viruses.
1972 Clean Water Act
cleaned up our nation water, provided billions of dollars for sewage treatment plants.
Point Source
distinct and confined. ex pipe coming from industrial plant, leak coming from underground tank.
1980 CERCLA
established superfund, Compensate Environmental Response Compensation and Liberty Act
Paper
for dirt and sediment
Thermal Pollution
occurs when water is withdrawn used for cooling purposes and returned to its source. If the water is raised by just a few degrees it can alter the some aquatic system. Indian point.
Waste water and sewage treatment used in modern countries
private homes have septic systems.
1899 Refuse Act
protected navigable water from pollution
Primary Treatment
removes 30% to 40% of the pollutants in the form of sludge. The sludge goes to land fills
Third World Countries
sewage in river and stream can cause mass infections and illness
Life Straw
they filter the water and make it clean enough to drink.
Water Diversion
used for irrigation or the production of hydroelectric power. Ecosystems destroyed.
Secondary Treatment
uses bacteria to breakdown to remaining sludge. The water is up to 90% clean and can be rentrned to rivers and streams.
Testing
water must be sent to an accredited lab to find out if it is safe to drink or swim in. The lab tests for bacteria such as coliform, organic chemicals, lead ect.
BOD
a measure of the amount of oxygen used by Micro-organism as they breakdown Mater
Charcoal
For organic chemicals
Advanced Treatment
For there purifiers anything still left in the water
Non- Point Source
Hard to Track back, an area of pollution, farms and factories.
Water Pollution
Industrial wast (land fills, oil-spills and leaks) Sewage. Agricultural waste and chemicals from fertilizing and detergents.
Chlorine
Kill the bacteria and viruses. Only this is usually added at a drinking water plat.
BOD*
When its high fish and other water life that need oxygen can no longer live in the water. This can be caused by sewage. Eventually, the pond or lake dies and eutrophication results.