William K. Koska, A Professional Corporation

William K. (Bill) Koska has done trial work and litigation for over five decades in Southern California. For the past 45 years, his practice has focused on litigation involving all aspects of real estate, as well as issues concerning land, water, environmental, and toxic tort litigation. His cases have included CERCLA, CEQA, Clean Air Act, Proposition 65, asbestos, federal and state safe drinking water laws, air quality matters, and construction contract disputes.

Mr. Koska has represented individuals, developers, corporations, and public utilities in high-profile cases, achieving landmark rulings and substantial settlements. His extensive trial experience, coupled with environmental and real estate expertise, has made him an effective advocate before state, county, and city permitting authorities. He is AV Rated by Martindale-Hubbell for more than 45 years and has been recognized as a Top Attorney by San Diego Magazine in the areas of Real Estate and Land Use.

Preovolos Lewin, ALC | San Diego, CA
Of Counsel | Present
Serve in the Environmental and Toxic Tort practice group, representing clients in real estate disputes, environmental contamination cases, and construction contract negotiations. Handle litigation involving asbestos, mold, boundary issues, landslides, and permitting matters before local and state authorities.

William Koska & Associates | San Diego, CA
Managing Partner | 01/1981 – Present
Represent Fortune 50 companies, developers, and private individuals in high-stakes environmental and real estate matters. Defend clients in product liability cases, negotiate multimillion-dollar contracts, and manage litigation for high-profile entertainment clients. Practice spans multiple states, including CA, NV, AZ, TX, and TN.

Tyson & Mendes | San Diego, CA
Of Counsel | 01/2022 –
Served in the Environmental and Toxic Tort practice group, leading litigation related to environmental issues. Negotiated construction contracts, represented clients in eminent domain and inverse condemnation cases, and defended environmental claims involving significant personal injury and air quality issues.

Frederickson, Mazeika & Grant | San Diego, CA
Of Counsel | 11/2012 – 01/2022
Handled complex real estate and environmental litigation, representing developers, subcontractors, and homeowners in disputes over contamination, boundary lines, and construction defects.

Consilio (f/k/a Legility) | San Diego, CA
Of Counsel | 05/2012 – 06/2021
Negotiated and reviewed construction and procurement contracts for multinational corporations, with a focus on compliance, cybersecurity, and international data privacy laws.

• Secured 7-figure settlement for Dial Corporation in chlorine tank explosion litigation.
• Achieved $95M settlement for Malibu homeowners after landslides as part of cross-complaint against Los Angeles County.
• Defended American States Water Company in toxic tort litigation involving 3,000+ plaintiffs, resulting in landmark California Supreme Court ruling.
• Negotiated over $100M in settlements for water contamination disputes with the State of California and Aerojet General Corp.
• Represented defendants in largest asbestos fine case in San Diego County, reducing liability to less than 8% of original fine.
  

Environmental & Toxic Torts | Complex Real Estate Disputes | Contract Negotiation | Litigation Management | Regulatory Compliance | Inverse Condemnation & Eminent Domain | Product Liability Defense | Strategic Legal Counsel

• Juris Doctor, University of Arizona, Tucson, AZ
• Bachelor of Science in Business Administration, University of Florida, Gainesville, FL
• Licensed to practice law in California & Tennessee
• Admitted to U.S. District Courts in California, Tennessee, and Nevada
  

A highly sought-after speaker, Mr. Koska has shared his experience in groundwater litigation with a number of national and regional industry associations, including the National Association of Water Companies (NAWC), the Southeast Regional Water Purveyors Association, the National Conference of Regulatory Attorneys and the National Association of Regulatory Utility Commissioners (NARUC). 

Following his presentation at the 2008 annual meeting of the NARUC Committee on Water, the NARUC Board of Directors adopted a resolution encouraging states to consider legislation or regulations that would provide a safe harbor from liability for water purveyors providing water in compliance with federal and state drinking water standards, similar to the California safe harbor confirmed by the Court of Appeal in the August 2007 case In re: Groundwater Cases.

Selected Recent Presentations

• 31st Annual National Conference of Regulatory Attorneys, “A Safe Harbor for Water Companies: From Litigation to Legislation,” June 2008, Charleston, South Carolina
• 
  National Association of Regulatory Utility Commissioners Committee on Water, “A Safe Harbor for Water Companies that Comply with Safe Drinking Water Standards: State Legislation,” February 2008, Washington, D.C. Click here to download the full PDF.
• National Association of Water Companies, 2007 National Drinking Water Symposium, Relief From Tort Liability for Drinking Water Providers,” October 2007, La Jolla, California. Click here to download the full PDF.
• American States Water Company, Officers and Senior Management, “Managing Electronic Information and E-Discovery,” October 2007, San Diego, California
• National Association of Regulatory Utility Commissioners, Staff Subcommittee on Accounting and Finance, “The Effect of Environmental Lawsuits,” September 2006, Portland, Maine
  

• Mr. Koska has authored articles for a variety of publications, including: 
  “From Litigation to Legislation: A Safe Harbor for Drinking Water Providers” (APWA Reporter, August 2008)
• “Wastewater Systems in 20 States Face Serious Funding Crisis” (April 3, 2008)
• “Unanimous Supreme Court Permits Private Parties to Sue for Cleanup Expenses Under CERCLA Section 107" (July 11, 2007)
• “Suing over Sewage: The Future of San Diego's Coastal Waters” (San Diego Transcript, May 2, 2002)