Meet the Team


In order to collect the water-quality data that drives the Baltimore Water Watch website, Blue Water Baltimore, the home of the Baltimore Harbor Waterkeeper, developed an ambient water quality monitoring program to collect scientifically-rigorous and legally-defensible water-quality data using the Mid-Atlantic Tributary Assessment Coalition (MTAC) protocol. The administration and management of our monitoring program are the responsibility of our Baltimore Harbor Waterkeeper, Angela Haren, our Lead Water Quality Scientist, Alice Volpitta, and our Water Quality Scientist, Barbara Johnson.

Blue Water Baltimore’s mission is to restore the quality of Baltimore’s rivers, streams, and Harbor to foster a healthy environment, a strong economy, and thriving communities. We work to protect and restore Baltimore Harbor and the greater Patapsco River and its tributaries through advocacy, enforcement, restoration, education, and engagement to make our waters suitable for fishing and swimming, improve public health, and improve the health of the river ecosystem.


Angela Haren

Angela Haren is the Baltimore Harbor Waterkeeper at Blue Water Baltimore. She directs the advocacy, enforcement, and water quality monitoring activities to protect and restore Baltimore’s waterways. Growing up playing in the streams, lakes, and ocean of Northern California, Angela is happiest when she’s on the water and looks forward to the day her kids can safely play in Baltimore’s streams. As an environmental attorney, Angela specializes in marine and fresh water conservation. Prior to joining BWB, she co-founded Clear Resource Law, a firm focused on natural resource management. She served as a contract attorney for the Natural Resources Defense Council and Program Director for California Coastkeeper Alliance. Angela holds a J.D. from Golden Gate University, an M.P.P. in Natural Resource Policy from the UCLA Luskin School of Public Affairs, and a B.A. in Literature from UC Davis.


Alice Volpitta

Alice Volpitta is the Lead Water Quality Scientist at Blue Water Baltimore. In this role she has worked with a variety of public and private stakeholders to design and implement water quality surveys, including both ambient water quality monitoring and Illicit Discharge Detection and Elimination studies. Alice manages the Quality Assurance protocols and operations in relation to these studies, including training other employees and volunteers in technical skills related to water quality assessment. Additionally, Alice compiles, analyzes, and interprets our water quality data in order to develop the Baltimore Water Watch. Prior to her time with Blue Water Baltimore, Alice worked with the Maryland Department of Natural Resources carrying out monitoring surveys across the state. She earned her degree in Biology with a minor in Environmental Studies from St. Mary’s College of Maryland.


Barbara Johnson

As Blue Water Baltimore's Water Quality Scientist, Barbara Johnson leads field teams for the ambient water quality monitoring program under the Baltimore Harbor Waterkeeper. Barbara also manages our Outfall Screening Blitz program and our Pollution Reporting 101 trainings and conducts pollution investigations when problems are reported by community members. Before joining Blue Water Baltimore, Barbara interned with the water quality monitoring program and earned a Bachelor of Arts degree in Environmental Sustainability and Human Ecology from the University of Baltimore.

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Sarah Holter

Sarah Holter serves as both Project Assistant for the Waterkeeper team and Development & Engagement Coordinator at Blue Water Baltimore. As Project Assistant she works to collect samples in the field and catalogs water quality data. Before joining Blue Water Baltimore in 2017 she worked in urban agriculture at Real Food Farm and home improvement at Cities For All Ages, both programs of Civic Works. Sarah earned a Bachelor of Arts in Economics from St. Mary’s College of Maryland, with a focus on Environmental Economics and minors in Environmental Studies and Studio Art.