Water Quality and Treatment

Our engineers and scientist want to help you find a solution to your water quality and treatment challeges. Contact us today!

We Specialize in Developing Solutions to Uncommon Water Quality & Treatment Challenges

We have no bias towards any approach – whether a simple operational change or applying a new technology – only that it best addresses our client’s needs.
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Distribution System Water Quality Optimization

Helping clients with all aspects of distribution system water quality.

Applied Research
and Pilot Testing

We specialize in bench scale
and pilot scale testing

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Monitoring and Response Planning

Providing clients support for the occurrence of emerging contaminants.

“The information and consultation provided to the District by Corona provide ongoing and clear data from which we are able to manage PFAS effectively.”

Andy Tuchscherer
Operations Manager at Sammamish Plateau Water, WA

Golden State Water Company, CA: Corrosion Control Evaluation

Golden State Water Company (GSWC) operates 37 water systems throughout California. All systems have complied with the Lead and Copper Rule (LCR) since the rule was promulgated in 1991. Even though GSWC’s systems have been in compliance, the company took the proactive step to evaluate the potential for enhanced corrosion control to improve water quality to customers and reduce leaks and failures. 

Corona assisted GSWC to 1) evaluate the corrosivity of existing and potential new source waters and determine feasibility of further corrosion control, 2) prioritize and rank the water systems that may benefit from enhanced corrosion control treatment, 3) develop recommendations on potential corrosion control treatment options for systems that may benefit from additional corrosion control, and 4) test various corrosion control options at the bench-scale. Corona also worked with GSWC to develop guidelines to evaluate how bringing new sources of supply online impacts corrosion control.

California Water Service, CA: Hexavalent Chromium Treatment Implementation

Corona conducted a treatment study for 27 different wells Cr(VI)-impacted wells operated by California Water Service (Cal Water) and found strong-base anion exchange (SBA-IX) or reduction-coagulation-filtration (RCF) to be the most cost-efficient options. As a result, Cal Water procured nine full-scale SBA-IX treatment facilities. Corona conducted pilot testing to optimize SBA-IX performance in terms of resin selection, contact time, and brine regeneration strategies, which was supported in part by a $5 million research grant from the Proposition 50 Chapter 6(b). Corona also conducted RCF pilot testing that showed Cr(VI) reduction with ferrous could proceed ~20-times faster than was originally thought.

Sammamish Plateau Water Supply District, WA: PFC Response Plan and Support

Corona developed a monitoring and response plan that presented Sammamish Plateau Water (District) with the following:

  • a plan for monitoring groundwater quality and pumping rates that impact the migration of per- and polyfluoroalkyl substances (PFAS) in the Lower Issaquah Valley, 
  • recommended water quality levels at which the District should move forward with design and implementation of a response alternative, and 
  • an assessment of non-treatment and treatment response alternatives.  

The plan contained recommended actions the District should take to reduce the likelihood of any future increases in PFAS concentrations as well as options for response actions and trigger levels the District should use to protect water quality provided to customers if increases in PFAS concentrations do occur.  Response options included non-treatment and treatment alternatives.  Descriptions of the non-treatment options available to the District, including pumping scenarios to maximize the production from Well 9 and limit Well 7 and 8 production and the purchase of additional regional water, were provided.  Treatment options for the District were compared between ion exchange (IX) and granular activated carbon (GAC). Ultimately, GAC was selected if a treatment response is pursued by the District.  Cost assessments were provided for non-treatment and treatment alternatives.

Contact Information

Craig Gorman

director of water quality and treatment

303-544-2161 x 403