Board of Directors

Nick Weigel

Nick is the acting President of COWA. He has over 15 years of experience in Civil Engineering and holds a Bachelor of Science in Civil Engineering from California State University, Chico. Nick is the President of NorthStar Engineering where he specializes in the design of decentralized wastewater collection, treatment, and dispersal systems.

Nick is active in the wastewater community and has taught at the California Wastewater Training and Research Center at CSU, Chico. He is a certified National Association of Wastewater Technicians instructor for the Onsite Wastewater Systems Inspector certification and Operation and Maintenance certification courses and teaches multiple courses for the California Onsite Wastewater Association. Nick is also on the Professional Advisory Board for the Department of Civil Engineering CSU, Chico and is chair of the Butte County Wastewater Advisory Committee.

 Laura Allen

Laura Allen is the co-founder of Greywater Action. She is the lead author of the San Francisco Greywater Design Manual for Outdoor Irrigation and the author of the how-to books Greywater, Greenlandscape and The Water-Wise Home: How to Capture, Conserve, and Reuse Water in Your Home and Landscape which includes technical instructions for design and installation of greywater systems. Laura works with cities and water agencies to develop and implement greywater education programs, and she also participates in code development. She is on the technical advisory committee for the International Association of Mechanical and Plumbing Officials’ (IAPMO) Water Efficiency Standard (We-STAND). Laura developed the first greywater training for professionals in California and leads classes and workshops on greywater systems design and installation.

 Tony Madrone

Tony is a sustainable landscape designer who specializes in irrigation and water management, and is the Principal at Indra Designs. Tony is dedicated to creating beautiful, functional and unique native-scapes utilizing drought tolerant plants, high efficiency irrigation and locally sourced materials when feasible. Tony applies his extensive knowledge of irrigation systems and residential stormwater management to designing and installing rainwater collection and greywater systems. Tony has 17 years of experience in landscape and irrigation design and is an ARCSA Accredited Professional, Qualified Water Efficient Landscaper (QWEL), EPA Certified Water Auditor, EPA Water Sense Partner and Licensed Landscape Contractor.

 Regina Hirsch

Regina is the Founder and Executive Director of Watershed Progressive, an onsite water design-build, consultation and education firm.  Watershed Progressive serves clients from the residential scale, to large institutional multiphase projects such as the CCC/National Guard Stormwater Low Impact Development (LID) Plan; Cal Poly San Luis Obispo Stormwater Catchment and Reuse Project; Evergreen and, Rush Creek Lodges Greywater and Stormwater Harvesting Projects –  all totaling several million gallons per year.

Regina sits as executive director for multiple organizations and as a consultant for state and regional government policy bodies.  Regina is a developer and co-organizer of the annual Localizing California Water Conference.  She is also co-owner of Mountain Sage Nursery. Regina is dedicated to bringing appropriate best management solutions to the public.  She is an ardent advocate for the natural and community benefits of watershed hydration.

California Onsite Water Association
PO Box 1063 | Groveland, CA | 95321

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