Water pollution has become one of the main problems that could be found in construction sites when building facilities in a community. It is necessary for the government and related departments to deal with this problem as water pollution may cause damage to the marine life. In this part, causes of water pollution and some related regulations will be briefly introduced.
First of all, here are 4 main reasons for water pollution caused by constructions:

1. Chemicals or building materials like sand or cement may be flushed away by raindrops and then the sewage may go down stormwater drains. The sewage then would follow the stormwater drains and be discharged into the sea without any treats like filtering or precipitate. This would pollute seawater and hence affect eco-system of that habitat.

2. Apart from that, water will be used in order to cool down boring crowns when drilling is occurred in a construction. The water is also considered as polluted water because of dust or rock fragments that are produced during drilling could be found in the water.

3. What’s more, washing vehicles that are used in construction sites is also one of the causes of water pollution that is found in construction sites. Sand or dust would be cleaned off the vehicles and so that makes the water used turbid.

4. Last but not least, some of the construction sites may have facilities for workers to use (for example toilets or workers’ canteens) and wastewater would then be produced. This kind of wastewater like dishwater or human waste usually contains organic compounds which would help pathogenic microbes grow. One of the well-known disease agents is Giardia lamblia which is commonly found in fecal materials.

If the polluted water produced by the above causes is not well treated before being discharged into the sea, then the coastal water in the vicinity of outfalls would be