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Water Quality

water_for_lifeThrough our dedicated Water Quality Task Force and other education and advocacy programs, SCWC is keeps our members informed and up to date on water quality issues and regulation.

Clean Water Act

Enacted by Congress in 1972, the Clean Water Act (CWA) is one of the nation’s most sweeping environmental laws, and it continues to make a broad, over-arching impact on the way water quality is regulated in California, and nationwide. The CWA established water quality standards based on the “best available technology economically feasible.” The goal of the CWA is to “restore and maintain chemical, physical and biological integrity of the nation’s waters.”


Safe Drinking Water Quality Act

The Safe Drinking Water Quality Act of 1974 (SDWQA) regulates drinking water quality throughout the United States. The purpose of the act was to ensure that the U.S. EPA controls the substances with the greatest risk, at the lowest cost to taxpayers; prevents contamination of source water; and informs consumers of contaminant levels and health risks in their water supply, and provides states with adequate flexibility to implement their own regulations.

  • Common Pollutants
  • Perchlorate
  • MTBE
  • Cryptosporidium
  • Disinfectant and disinfection byproduct rule (D/DBP)
  • Chromium-6
  • Volatile organic compounds (VOCs)
  • Compounds of Emerging Concerns (CECs)

Currently, prominent debates are taking place statewide and nationally regarding the regulation of perchlorate and chromium-6. In the case of these compounds, and other debates over water quality, SCWC believes that proper regulation must go hand-in-hand with meticulous review of the best science available. Risk factors for water contaminants must be based on hard findings alone, and the reach of water quality regulation must be reconciled with the feasibility of compliance.

SCWC monitors issues of water quality regulation closely, and we contribute consistently to this crucial dialogue to ensure the safety and reliability of California’s water supply.


April 15, 2014

Los Angeles Times - California to set chromium limit for drinking water supplies

Los Angeles Times 4 15 14

March 7, 2014

Letter to Governor Brown re: CA's Proposed Chromium 6 Drinking Water Standard Would Impede Delivery of Safe, Clean and Affordable Drinking WaterLos Angeles Times - California to set chromium limit for drinking water supplies


October 10, 2013 

Comments on Proposed Chrom 6 MCL


Sample Comment Letter Cr6 MCL

October 8, 2013

Appendix A:  Technical Summary of ToxStrategies Inc. Cr6Mode of Action (“MOA”) Framework Research Program’s Published Studies 

July 31, 2013

Office of Environmental Health Hazard Assessment July 2011 Public Health Goal for Hexavalent Chromium

July 31, 2013

Petition to Re-Evaluate the Public Health Goal for Hexavalent Chromium

July 31, 2013

SCWC & AWWA Co-Host Webinar on Latest Chromium Research - Presentation from ToxStrategies

Audio File

November 14, 2012


Atwater Participates in California Wastewater Industry Roundtable

October 2, 2012


Chronology & Status Update-Chromium 6 

October 5, 2011  

FAQ: Chromium-6

October 5,2011


FAQ: Chromium-6



May 31, 2011

Comment Letter: Chromium-6

April 25, 2011

Comment Letter: Sacramento Regional County Sanitation District


March 8, 2011

Comment Letter: Perchlorate


Feb. 7, 2011

Comment Letter: Chromium-6

Oct. 22, 2010

Comment Letter: Chromium-6


Oct. 5, 2010

Comment Letter: Sacramento Regional County Sanitation District

Sept. 30, 2010

Comment Letter: Perchlorate


June 22, 2010

Comment Letter: Perchlorate


Oct. 29, 2009

Comment Letter: Chromium-6

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