log in
Print | Back

Hanson Bridgett LLP

Nathan A. Metcalf

Nathan A. Metcalf


Hanson Bridgett LLP
California, U.S.A.

tel: 415-995-5838
Send an Email

Local Time: Fri. 10:57


Nathan has over a decade of experience in environmental law and water law. Nathan advises clients on water rights issues in defending and protesting water rights applications and transfers, including related issues under the California Environmental Quality Act, the California Fish and Game Code, the Clean Water Act sections 401 and 404, the Porter-Cologne Water Quality Act, the Endangered Species Act, and the public trust, reasonable use and physical solutions doctrines. Nathan has assisted public agency clients in implementation of the Sustainable Groundwater Management Act (SGMA) and the State's emergency water conservation regulations. His experience includes involvement in water transfers and groundwater managements issues related to dwindling water supplies. Nathan has also defended industrial and municipal clients in stormwater permit compliance and citizen suit actions involving stormwater discharges under the Clean Water Act.

Nathan has experience in NEPA/CEQA compliance, environmental due diligence, remediation and development of contaminated properties, environmental reporting requirements, hazardous waste management, environmental permitting, Prop 65, UST clean-up, and endangered species. Nathan has appeared before numerous administrative and judicial proceedings including, the Ninth Circuit Court of Appeals, California Superior Court, the California State Water Resources Control Board, the Nevada State Engineer and a Bureau of Land Management, Administrative Law Judge.

Before becoming an attorney, Nathan worked in the areas of hazardous waste disposal and environmental health and safety (EH&S) management for medical instrument, drug delivery and biotechnology companies.

Bar Admissions

  • California
  • Nevada
  • U.S. Court of Federal Claims
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. District Court for the Northern District of California


J.D., University of San Francisco School of Law (2005)
M.S., University of San Francisco (1997)
B.S., Clarion University of Pennsylvania (1989)
Areas of Practice
Professional Career

Significant Accomplishments

Water Law. Advises water right owners on permitting and reporting requirements before the SWRCB. Adjudication of water rights in administrative hearings. Achieved the dismissal of claims of forfeiture, abandonment, and lack of perfection for more than 1,400 individual water right owners in Federal Reclamation project. Assists with groundwater management, drought conservation measures and water transfers and wheeling agreements. Experience in fishery restoration projects and negotiated settlements with government agencies and environmental groups. Advises public agency clients in the implementation of SGMA including basin boundary modifications, application to become a Groundwater Sustainability Agency (GSA) and development of alternatives to a Groundwater Sustainability Plan (GSP).

Municipal Clients. Advises clients on environmental compliance requirements and review of environmental documents (CEQA / NEPA / ESA).

Industrial Stormwater. Advises municipal and industrial clients on stormwater compliance and defending citizen suit actions under the Clean Water Act, and negotiation of settlements.

Prop 65. Defends clients in Prop 65 actions, and resolves litigation through favorable settlement terms

Professional Activities and Experience

  • Northern California Rising Stars (2010–2015)


HB Briefly
Hanson Bridgett LLP 

Briefly is designed to provide readers with updates on the latest litigation developments in California. Our focus is on general litigation as well as issues surrounding class actions, products liability, discovery, privacy, cybersecurity, and the professional practice of law.


"Can Groundwater Permitting Affect the Public Trust?," co-author, Water Law Alert (September 2018)
"California's First Appellate District Court Finds Reasonable Use Determination Requires Consideration of All Competing Water Users," Water Law Alert (February 2018)
"Ninth Circuit: Changes in Water Flows Benefiting Fish Don’t Require SWRCB Permission," Water Law Alert (February 2017)
"DWR Provides Notice Of Proposed Emergency Regulatory Action for GSPs Under SGMA," co-author, Water Law Alert (July 2016)
"The DWR Releases Proposed Groundwater Sustainability Plan Emergency Regulations Under SGMA," co-author, Water Law Alert (May 2016)
"Governor Issues New Water Conservation Order; SWRCB Proposes Water Conservation Emergency Regulation Amendments," co-author, Water Law Alert (May 2016)
"The DWR Releases Draft Regulations for the Management of Groundwater Basins Under SGMA," co-author, Water Law Alert (February 2016)
"Infographic: Sustainable Groundwater Management Act (SGMA)," Hanson Bridgett's In The Loop (October 2015)
"The Sustainable Groundwater Management Act: Implementation Update," Water Law Alert (August 2015)
"SWRCB Issues Curtailment Notice for Senior Water Rights," Water Law Alert (June 2015)
"New Ruling: CDFW Notification Required For Water Diversions That Don’t Alter Streambed," Water Law Alert (June 2015)
"SWRCB Issues Emergency Regulation and Governor Proposes Conservation Enforcement Legislation," co-author, Water Law Alert (April 2015)
"SWRCB Issues Draft Regulations to Achieve 25% Water Use Reduction," co-author, Water Law Alert (April 2015)
"Update: State Water Resources Control Board Releases Proposed Regulatory Framework to Implement the Drought Executive Order," co-author, Water Law Alert (April 2015)
"Drought State of Emergency: Governor Brown Issues Executive Order Mandating 25 Percent Reduction of Urban Water Usage," co-author, Water Law Alert (April 2015)
"State Water Resources Control Board Proposes to Continue and Add New Requirements to the Drought Emergency Water Conservation Regulations," Water Law Alert (March 2015)
"â??State Water Resources Control Board Requires Additional Reporting by Riparian and Pre-1914 Water Right Owners," co-author, Water Law Alert (February 2015)
"Gearing Up for the Continuing Drought Emergency," Water Law Alert (February 2015)
"Court Finds SWRCB has Jurisdiction over Pre-1914 Water Rights and Defines Forfeiture Standard," Water Law Alert (September 2014

"Superior Court Finds Issuance of Well Drilling Permit for Groundwater Extraction is Subject to the Public Trust Doctrine," Water Law Alert (July 2014) 

"Sour Grapes: A Potential Prelude to Water Rights Curtailment," Water Law Alert (June 2014)

WSG's members are independent firms and are not affiliated in the joint practice of professional services. Each member exercises its own individual judgments on all client matters.

HOME | SITE MAP | GLANCE | PRIVACY POLICY | DISCLAIMER |  © World Services Group, 2019