- Failed some Health Guidelines
- Failed some Legal Limits
- Met all Reporting and Monitoring Requirements
- Uses Chlorine disinfectant
In 1960 California introduced the State Water Project (SWP) which includes 22 dams and reservoirs, a pumping plant, and a 444-mile-long aqueduct that carries water to southern California from the San Joaquin Valley. The SWP provides irrigation water to farms in the San Joaquin Valley and is a major supply source for Los Angeles and surrounding cities. The Colorado River also provides water that serves over 18 million customers in Los Angeles and surrounding cities. Thirty percent of California's total annual water supply comes from groundwater, and up to 60 percent in drought years.
The Los Angeles Department of Water and Power monitors its water supply for over 200 different contaminants throughout the year. When water does not meet established standards, it's treated to reduce contaminant levels. Apart from filtering and disinfecting the water, contaminant levels are also reduced through a process called blending which involves mixing water from different sources. Mountain streams usually contain significant amounts of animal waste, while groundwater may have high levels of radon. Many residents of Los Angeles are turning off their faucets and resorting to bottled water. However, bottled water regulations are nearly identical to those imposed on public drinking water. Los Angeles water exceeded legal limits for both Arsenic and potentially carcinogenic disinfectant by-products. It is also above health guidelines for radioactive elements. Experts agree that filtering your water is not only cost effective, but the safest route one can take.
Los Angeles, CA Water Quality Recent Violations
There were no health violations for in the 2010-2012 reporting periods
There were no reporting, montioring or other reported violations for in the 2010-2012 reporting periods
Los Angeles, CA Water Quality Historical Violations
|Contaminant||Total Tests||Positive Results||Above Health Limits||Above Legal Limits||EPA Regulated||Max Result||Health Limit||Legal Limit|
|Total trihalomethanes (TTHMs)||303||268||0||6||Yes||119.41||-||80|
|Alpha particle activity||90||88||88||0||Yes||5.97||-||15|
|Combined Uranium (pCi/L)||73||70||0||0||Yes||6.91||15||15|
|Gross beta particle activity (pCi/L)||7||7||0||0||Yes||5.26||15||15|
|Nitrate & nitrite||137||12||0||0||Yes||3.52||10||10|
|Total haloacetic acids (HAAs)||149||1||0||0||Yes||29||70||60|
|Total trihalomethanes (TTHMs)||43||13||0||0||Yes||43||-||80|
43 Contaminants were detected, 2 above legal limits, 7 above health guidelines, and 34 below limits for water suppliers serving Los Angeles, CA between 2004 and 2009.
82 Water Contaminants were tested for in the Los Angeles, CA area but not found in drinking water between 2004 and 2009.
Data Source: NYTimes.com
The scores and results above reflect a summary of the historical drinking water testing results that has been documented by the EPA and other sources. The color coding of the symbols was developed by WaterFilterComparisions.com as an easy way for individuals to gauge the historical effectiveness of Los Angeles water suppliers in meeting legal and health regulations in providing clean drinking water. This should only be used as a guide, and WaterFilterComparisons recommends you contact Los Angeles water suppliers to better understand the quality of the drinking water in Los Angeles, .