Industrial and construction sites promote water pollution. They drain their wastes into the water sources and this poses a risk to marine life. Sewer overflows are also a source of water pollution. These sewage spills are rampant due to the inefficiency of water treatment plants (Tijuana River Valley Recovery Team 44). Pollution results from the lack of well-connected piping and this facilitates the flow of untreated sewerage into the waters. The fact that the storm drains have weak linkages with the sewer systems does not alleviate the situation. The stormwater flows directly into water sources and this is the greatest challenge that thwarts the efforts to alleviate water pollution. Furthermore, wastewater from homes poses danger since discharging it into water sources results in contamination. Detergents and pesticides found in the wastewater end up in the oceans and rivers.