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occurs when water is withdrawn used for cooling purposes and returned to its source.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.