Reference Documents

Saturday, November 03, 2012

County Releases LO Water Recycling Baseline GW Quality Monitoring Report

You can find it at this link:

http://www.slocounty.ca.gov/Assets/PW/LOWWP/Baseline+Groundwater+Quality+Monitoring.pdf

Looks like 16 of the 25 wells had total Nitrogen levels over 10 mg/l. Hmmm, hardly the one point above legal levels as asserted by some (assuming 10 mg/l average statewide allowed, but our level must be 7 mg/l or below). 8 wells had 7 mg/l or below, so approximately 2/3rds of the wells are over the limit.

On page 7 under "CONCLUSIONS" of the report, we find this,

"The average NO3-N concentration for the 25 wells sampled is 13.4 mg/l (median value 14.4 mg/l). The greatest concentrations of NO3-N are reported at wells in Baywood Park and south of Los Osos Valley Road. Individual fluctuations in NO3-N concentrations across the network, when averaged together, showed a 2.3 mg/l increase between October 2006 and August 2012. The number of monitoring network wells with water quality in excess of the NO3-N drinking water standard of 10 mg/l is presently 16 out of 25 wells tested."

It appears that things are getting worse, not better as some have asserted. Well, we have our baseline now and once the sewer is up and running let's see where these numbers go. I think we can forget all about the urban legends of decaying underground forests and cows in the valley to account for the nitrates.

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