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California's water has gotten cleaner
Environmental laws are having a positive effect on reducing levels of contaminant metals in Californian coastal waters
Credit: Wikimedia Commons
Panoramic shot of the Los Angeles Basin from Mulholland Drive. The Pacific Ocean is to the far right.
Environmental Science & Technology | Article Status of Metal Contamination in Surface Waters of the Coastal Ocean off Los Angeles, California since the Implementation of the Clean Water Act | 04-29-2012
In order to establish the status of metal contamination in surface waters in the coastal ocean off Los Angeles, California, reseachers determined their dissolved and particulate pools and compared them with levels reported in the 1970s prior the implementation of the Clean Water Act.
These measurements revealed a significant reduction in particulate toxic metal concentrations in the last 33 years with decreases of 100-fold for lead (Pb) and 400-fold for Copper (Cu( and Cadmium (Cd).
Overall, dissolved trace metal concentrations in the Los Angeles coastal waters were remarkably low with values in the same range as those measured in a pristine coastal environment off Mexico’s Baja California peninsula.
Primary source â–º Article Status of Metal Contamination in Surface Waters of the Coastal Ocean off Los Angeles, California since the Implementation of the Clean Water Act
Further reading â–º http://x-ray-mag.com/
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