DESCRIPTION – Historical Bacteriological Water Quality Data

(All historical data is contained in the text files for each of the years listed below. Each file can be saved to your personal computer and then imported to a suitable spreadsheet or database program. Please refer to your software documentation for instructions on importing text files.)

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Historical Bacteriological Water Quality Data – 2023 Historical Bacteriological Water Quality Data
Historical Bacteriological Water Quality Data – 2022 Historical Bacteriological Water Quality Data
Historical Bacteriological Water Quality Data – 2017 thru 2021 Excel file
Historical Bacteriological Water Quality Data – 2011 thru 2016 Excel file

Historical Bacteriological Water Quality Data – 2000 thru 2010

 Excel file

Historical Bacteriological Water Quality Data – 1990 thru 1999

 Excel file
Historical Bacteriological Water Quality Data – 1986 thru 1989 Excel file

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Coastal Storm Drain Outfall Program

Sampling stations in the Coastal Storm Drain Outfall Program (CSDO) have been incorporated into a new Regional Monitoring Plan. Starting April 6, 2015, new CSDO data will be stored in the Historical Bacteriological Quality Water Quality files found above.

The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, issued by the San Diego Regional Water Quality Control Board to Orange County and the incorporated cities of South Orange County, requires routine bacteriological monitoring of coastal storm drains and their respective ocean receiving waters. Pursuant to these requirements, a monitoring program was developed by the County and approved by the Regional Board. Samples are collected weekly during dry weather from the major storm drains, and in the surf zone 25 yards upcoast (northerly direction) and 25 yards downcoast (southerly direction) of the respective drain-ocean interface. The intent of this monitoring is to evaluate the impacts (magnitude and trends) of urban runoff to the coastal zone.

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Acronyms and Directions to Download Coastal Storm Drain Outfall Program Data

Acronyms and Directions to Download Coastal Storm Drain Outfall Program Data - text file
Coastal Storm Drain Outfall Program – 2015 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2015 - Excel file
Coastal Storm Drain Outfall Program – 2014 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2014 - Excel file
Coastal Storm Drain Outfall Program – 2013 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2013 - Excel file
Coastal Storm Drain Outfall Program – 2012 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2012 - Excel file
Coastal Storm Drain Outfall Program – 2011 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2011 - Excel file

Coastal Storm Drain Outfall Program – 2010

 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2010 - Excel file

Coastal Storm Drain Outfall Program – 2009

 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2009 - Excel file
Coastal Storm Drain Outfall Program – 2008 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2008 - Excel file
Coastal Storm Drain Outfall Program – 2007 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2007 - Excel file
Coastal Storm Drain Outfall Program – 2006 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2006 - Excel file

Coastal Storm Drain Outfall Program – 2005

 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2005 - Excel file

Coastal Storm Drain Outfall Program – 2004

 Coastal Storm Drain Outfall Program - 2015 - text fileCoastal Storm Drain Outfall Program - 2004 - Excel file