Water pollution occurs when unnatural chemicals, bacteria, or microorganisms are present in water. In Poland, the main cause of water pollution is sewage from industrial and municipal systems, which introduces inorganic, organic, and radioactive substances that change the water's physical, chemical, and bacterial composition. While Poland monitors drinking water quality, the state of its surface water is systematically deteriorating. In contrast, water pollution is not a serious problem in Tenerife due to few factories, farms, and sewage outflows, and it is estimated to have one of the lowest levels of water pollution worldwide.

1. WATER POLLUTION
Poland and Tenerife
By group 1

2. What is water pollution?
Water pollution is when the composition of water consists of chemicals,
bacteria and microorganisms in an increased amount that are not its
natural components.

3. What causes the water pollution?
The changes in physical, chemical and bacteriological properties of water are caused by
the introduction of inorganic, organic and radioactive substances.

4. Water pollution in
Poland

5. Main cause of water pollution in Poland
The main cause of water degradation in Poland is sewage discharged from
industrial and municipal sewage systems.

6. Point pollutants
They are so-called point pollutants and include water used in production and
service facilities.

7. Potable water is constantly monitored
The amount of drinking water is constantly monitored and its quality classified
according to the degree of pollution. In Poland, in 1993, approximately 12,278
million m3 of water was used.

8. The problem
However, the state of surface water in Poland is systematically deteriorating.

9. Water pollution in Tenerife

10. In Tenerife, water pollution is not a serious
problem
In Tenerife, the level of water pollution is low because there are few factories,
arable fields and sewage outflows.

11. It is estimated that Tenerife has one of the smallest water pollution in the world.
Therefore, it is possible to see up to 25 meters down into the ocean at some point
near the island.