While lacking coercive power to compel enforcement, interstate compacts create accountability through multiple sources and layers connecting enforcement behavior to oversight. Using logistic regression, we test a model of accountability and enforcement of unauthorized water usage on the Klamath River. Findings indicate unauthorized water usage is far more likely to be reported and enforced on the Klamath River than on neighboring rivers in the same counties. Conclusions indicate the increased institutional layers of interstate compacts lead to more accountability and stringent enforcement and reporting of unauthorized water use.