Water quality
Story
From Bilingual Weekly - Wednesday, May 30, 2012
Coalition response...The author does a credible job with a very complex issue. As explained
in the article, selenium and salt are naturally occurring minerals in the soil
and irrigating the lands along the west side of the San Joaquin Valley has
created water runoff that transports the selenium and salt to the San Joaquin
River. Everyone involved with this issue have recognized that the amount of
runoff water reaching the river has declined in recent years, even critics of
farming in the region.
"Most of the contamination
now comes from the Grassland Drainage Area (GDA)," according to the
author. A project undertaken in the GDA by farmers, local water districts,
State/federal agencies and some environmental organizations has achieved remarkable
results in stemming the flow of water runoff. More than 57,500 acre-feet of
runoff water was discharged through drainage channels in 1995 before the
establishment of the Grasslands Bypass Project. That number dropped to 14,500
acre-feet, a 75% reduction, by 2010. In addition, the amount of selenium, salt
and boron have also been reduced by 87%, 72% and 64%, respectively. These
results should give hope to those concerned with the runoff levels, especially
if most of the remaining runoff is within the GDA, as suggested by the author.
The Central Valley Regional Water
Quality Control Board has closely monitored the results of the project and has
continued its Use Permit to continue its efforts through 2019. The U.S.
Environmental Protection Agency has labeled the projects efforts as a
"success story." Read their declaration at http://water.epa.gov/polwaste/nps/success319/ca_san.cfm.
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