Insights

Greene Economics led the 2025 update of Thurston County’s On-Site Sewage System Management Plan to meet new state code and strengthen public and environmental health protections for drinking water, shellfish beds, and Puget Sound. The plan targets vulnerable on-site sewage systems—especially in sensitive and flood-prone areas—enhances data and climate change planning, protects sensitive watershed, and supports more than 55,000 systems serving homes and businesses countywide.

The Washington Legislature commissioned an independent review of the state's commercial shellfish fees. Greene Economics assessed whether the industry could bear full cost recovery — and pointed to a public-good solution.

Biotoxin testing protects public health and a $416 million industry. Greene Economics makes the economic case for funding it as a public good, rather than charging the cost to commercial shellfish operations.

King County has more than 85,000 on-site sewage systems, many nearing the end of their working life. Our cost and equity analysis estimates what it will take to address failing septic systems and shows the county where to focus sewer investment and financial assistance.

The COVID-19 economy has disrupted daily life and created uncertainty for households and businesses alike. Many people are concerned about the future of the economy and how short-term disruptions may affect long-term recovery. Greene Economics shares key insights on the economic impacts of the COVID-19 economy, from household challenges and stimulus measures to broader macroeconomic trends.