{Reference Type}: Journal Article {Title}: Trends of Enterovirus D68 Concentrations in Wastewater, California, USA, February 2021-April 2023. {Author}: Boehm AB;Wadford DA;Hughes B;Duong D;Chen A;Padilla T;Wright C;Moua L;Bullick T;Salas M;Morales C;White BJ;Glaser CA;Vugia DJ;Yu AT;Wolfe MK; {Journal}: Emerg Infect Dis {Volume}: 29 {Issue}: 11 {Year}: 2023 11 {Factor}: 16.126 {DOI}: 10.3201/eid2911.231080 {Abstract}: In this retrospective study, we measured enterovirus D68 (EV-D68) genomic RNA in wastewater solids longitudinally at 2 California, USA, wastewater treatment plants twice per week for 26 months. EV-D68 RNA was undetectable except when concentrations increased from mid-July to mid-December 2022, which coincided with a peak in confirmed EV-D68 cases.